Initial checkin

6 files changed, 6463 insertions, 0 deletions

diff --git a/library/HTML5/Data.php b/library/HTML5/Data.php
new file mode 100644
index 000000000..fa97e3ee8
--- /dev/null
+++ b/library/HTML5/Data.php
@@ -0,0 +1,120 @@
+<?php
+
+// warning: this file is encoded in UTF-8!
+
+class HTML5_Data
+{
+
+    // at some point this should be moved to a .ser file. Another
+    // possible optimization is to give UTF-8 bytes, not Unicode
+    // codepoints
+    protected static $realCodepointTable = array(
+        0x0D => 0x000A, // LINE FEED (LF)
+        0x80 => 0x20AC, // EURO SIGN ('€')
+        0x81 => 0xFFFD, // REPLACEMENT CHARACTER
+        0x82 => 0x201A, // SINGLE LOW-9 QUOTATION MARK ('‚')
+        0x83 => 0x0192, // LATIN SMALL LETTER F WITH HOOK ('ƒ')
+        0x84 => 0x201E, // DOUBLE LOW-9 QUOTATION MARK ('„')
+        0x85 => 0x2026, // HORIZONTAL ELLIPSIS ('…')
+        0x86 => 0x2020, // DAGGER ('†')
+        0x87 => 0x2021, // DOUBLE DAGGER ('‡')
+        0x88 => 0x02C6, // MODIFIER LETTER CIRCUMFLEX ACCENT ('ˆ')
+        0x89 => 0x2030, // PER MILLE SIGN ('‰')
+        0x8A => 0x0160, // LATIN CAPITAL LETTER S WITH CARON ('Š')
+        0x8B => 0x2039, // SINGLE LEFT-POINTING ANGLE QUOTATION MARK ('‹')
+        0x8C => 0x0152, // LATIN CAPITAL LIGATURE OE ('Œ')
+        0x8D => 0xFFFD, // REPLACEMENT CHARACTER
+        0x8E => 0x017D, // LATIN CAPITAL LETTER Z WITH CARON ('Ž')
+        0x8F => 0xFFFD, // REPLACEMENT CHARACTER
+        0x90 => 0xFFFD, // REPLACEMENT CHARACTER
+        0x91 => 0x2018, // LEFT SINGLE QUOTATION MARK ('‘')
+        0x92 => 0x2019, // RIGHT SINGLE QUOTATION MARK ('’')
+        0x93 => 0x201C, // LEFT DOUBLE QUOTATION MARK ('“')
+        0x94 => 0x201D, // RIGHT DOUBLE QUOTATION MARK ('”')
+        0x95 => 0x2022, // BULLET ('•')
+        0x96 => 0x2013, // EN DASH ('–')
+        0x97 => 0x2014, // EM DASH ('—')
+        0x98 => 0x02DC, // SMALL TILDE ('˜')
+        0x99 => 0x2122, // TRADE MARK SIGN ('™')
+        0x9A => 0x0161, // LATIN SMALL LETTER S WITH CARON ('š')
+        0x9B => 0x203A, // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK ('›')
+        0x9C => 0x0153, // LATIN SMALL LIGATURE OE ('œ')
+        0x9D => 0xFFFD, // REPLACEMENT CHARACTER
+        0x9E => 0x017E, // LATIN SMALL LETTER Z WITH CARON ('ž')
+        0x9F => 0x0178, // LATIN CAPITAL LETTER Y WITH DIAERESIS ('Ÿ')
+    );
+
+    protected static $namedCharacterReferences;
+
+    protected static $namedCharacterReferenceMaxLength;
+
+    /**
+     * Returns the "real" Unicode codepoint of a malformed character
+     * reference.
+     */
+    public static function getRealCodepoint($ref) {
+        if (!isset(self::$realCodepointTable[$ref])) return false;
+        else return self::$realCodepointTable[$ref];
+    }
+
+    public static function getNamedCharacterReferences() {
+        if (!self::$namedCharacterReferences) {
+            self::$namedCharacterReferences = unserialize(
+                file_get_contents(dirname(__FILE__) . '/named-character-references.ser'));
+        }
+        return self::$namedCharacterReferences;
+    }
+
+    public static function getNamedCharacterReferenceMaxLength() {
+        if (!self::$namedCharacterReferenceMaxLength) {
+            $namedCharacterReferences = self::getNamedCharacterReferences();
+            $lengths = array_map('strlen', array_keys($namedCharacterReferences));
+            self::$namedCharacterReferenceMaxLength = max($lengths);
+        }
+        return self::$namedCharacterReferenceMaxLength;
+    }
+
+
+    /**
+     * Converts a Unicode codepoint to sequence of UTF-8 bytes.
+     * @note Shamelessly stolen from HTML Purifier, which is also
+     *       shamelessly stolen from Feyd (which is in public domain).
+     */
+    public static function utf8chr($code) {
+        if($code > 0x10FFFF or $code < 0x0 or
+          ($code >= 0xD800 and $code <= 0xDFFF) ) {
+            // bits are set outside the "valid" range as defined
+            // by UNICODE 4.1.0
+            return "\xEF\xBF\xBD";
+        }
+
+        $x = $y = $z = $w = 0;
+        if ($code < 0x80) {
+            // regular ASCII character
+            $x = $code;
+        } else {
+            // set up bits for UTF-8
+            $x = ($code & 0x3F) | 0x80;
+            if ($code < 0x800) {
+               $y = (($code & 0x7FF) >> 6) | 0xC0;
+            } else {
+                $y = (($code & 0xFC0) >> 6) | 0x80;
+                if($code < 0x10000) {
+                    $z = (($code >> 12) & 0x0F) | 0xE0;
+                } else {
+                    $z = (($code >> 12) & 0x3F) | 0x80;
+                    $w = (($code >> 18) & 0x07) | 0xF0;
+                }
+            }
+        }
+        // set up the actual character
+        $ret = '';
+        if($w) $ret .= chr($w);
+        if($z) $ret .= chr($z);
+        if($y) $ret .= chr($y);
+        $ret .= chr($x);
+
+        return $ret;
+    }
+
+}
diff --git a/library/HTML5/InputStream.php b/library/HTML5/InputStream.php
new file mode 100644
index 000000000..f98b42723
--- /dev/null
+++ b/library/HTML5/InputStream.php
@@ -0,0 +1,284 @@
+<?php
+
+/*
+
+Copyright 2009 Geoffrey Sneddon <http://gsnedders.com/>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+// Some conventions:
+// /* */ indicates verbatim text from the HTML 5 specification
+// // indicates regular comments
+
+class HTML5_InputStream {
+    /**
+     * The string data we're parsing.
+     */
+    private $data;
+
+    /**
+     * The current integer byte position we are in $data
+     */
+    private $char;
+
+    /**
+     * Length of $data; when $char === $data, we are at the end-of-file.
+     */
+    private $EOF;
+
+    /**
+     * Parse errors.
+     */
+    public $errors = array();
+
+    /**
+     * @param $data Data to parse
+     */
+    public function __construct($data) {
+
+        /* Given an encoding, the bytes in the input stream must be
+        converted to Unicode characters for the tokeniser, as
+        described by the rules for that encoding, except that the
+        leading U+FEFF BYTE ORDER MARK character, if any, must not
+        be stripped by the encoding layer (it is stripped by the rule below).
+
+        Bytes or sequences of bytes in the original byte stream that
+        could not be converted to Unicode characters must be converted
+        to U+FFFD REPLACEMENT CHARACTER code points. */
+
+        // XXX currently assuming input data is UTF-8; once we
+        // build encoding detection this will no longer be the case
+        //
+        // We previously had an mbstring implementation here, but that
+        // implementation is heavily non-conforming, so it's been
+        // omitted.
+        if (extension_loaded('iconv')) {
+            // non-conforming
+            $data = @iconv('UTF-8', 'UTF-8//IGNORE', $data);
+        } else {
+            // we can make a conforming native implementation
+            throw new Exception('Not implemented, please install mbstring or iconv');
+        }
+
+        /* One leading U+FEFF BYTE ORDER MARK character must be
+        ignored if any are present. */
+        if (substr($data, 0, 3) === "\xEF\xBB\xBF") {
+            $data = substr($data, 3);
+        }
+
+        /* All U+0000 NULL characters in the input must be replaced
+        by U+FFFD REPLACEMENT CHARACTERs. Any occurrences of such
+        characters is a parse error. */
+        for ($i = 0, $count = substr_count($data, "\0"); $i < $count; $i++) {
+            $this->errors[] = array(
+                'type' => HTML5_Tokenizer::PARSEERROR,
+                'data' => 'null-character'
+            );
+        }
+        /* U+000D CARRIAGE RETURN (CR) characters and U+000A LINE FEED
+        (LF) characters are treated specially. Any CR characters
+        that are followed by LF characters must be removed, and any
+        CR characters not followed by LF characters must be converted
+        to LF characters. Thus, newlines in HTML DOMs are represented
+        by LF characters, and there are never any CR characters in the
+        input to the tokenization stage. */
+        $data = str_replace(
+            array(
+                "\0",
+                "\r\n",
+                "\r"
+            ),
+            array(
+                "\xEF\xBF\xBD",
+                "\n",
+                "\n"
+            ),
+            $data
+        );
+
+        /* Any occurrences of any characters in the ranges U+0001 to
+        U+0008, U+000B,  U+000E to U+001F,  U+007F  to U+009F,
+        U+D800 to U+DFFF , U+FDD0 to U+FDEF, and
+        characters U+FFFE, U+FFFF, U+1FFFE, U+1FFFF, U+2FFFE, U+2FFFF,
+        U+3FFFE, U+3FFFF, U+4FFFE, U+4FFFF, U+5FFFE, U+5FFFF, U+6FFFE,
+        U+6FFFF, U+7FFFE, U+7FFFF, U+8FFFE, U+8FFFF, U+9FFFE, U+9FFFF,
+        U+AFFFE, U+AFFFF, U+BFFFE, U+BFFFF, U+CFFFE, U+CFFFF, U+DFFFE,
+        U+DFFFF, U+EFFFE, U+EFFFF, U+FFFFE, U+FFFFF, U+10FFFE, and
+        U+10FFFF are parse errors. (These are all control characters
+        or permanently undefined Unicode characters.) */
+        // Check PCRE is loaded.
+        if (extension_loaded('pcre')) {
+            $count = preg_match_all(
+                '/(?:
+                    [\x01-\x08\x0B\x0E-\x1F\x7F] # U+0001 to U+0008, U+000B,  U+000E to U+001F and U+007F
+                |
+                    \xC2[\x80-\x9F] # U+0080 to U+009F
+                |
+                    \xED(?:\xA0[\x80-\xFF]|[\xA1-\xBE][\x00-\xFF]|\xBF[\x00-\xBF]) # U+D800 to U+DFFFF
+                |
+                    \xEF\xB7[\x90-\xAF] # U+FDD0 to U+FDEF
+                |
+                    \xEF\xBF[\xBE\xBF] # U+FFFE and U+FFFF
+                |
+                    [\xF0-\xF4][\x8F-\xBF]\xBF[\xBE\xBF] # U+nFFFE and U+nFFFF (1 <= n <= 10_{16})
+                )/x',
+                $data,
+                $matches
+            );
+            for ($i = 0; $i < $count; $i++) {
+                $this->errors[] = array(
+                    'type' => HTML5_Tokenizer::PARSEERROR,
+                    'data' => 'invalid-codepoint'
+                );
+            }
+        } else {
+            // XXX: Need non-PCRE impl, probably using substr_count
+        }
+
+        $this->data = $data;
+        $this->char = 0;
+        $this->EOF  = strlen($data);
+    }
+
+    /**
+     * Returns the current line that the tokenizer is at.
+     */
+    public function getCurrentLine() {
+        // Check the string isn't empty
+        if($this->EOF) {
+            // Add one to $this->char because we want the number for the next
+            // byte to be processed.
+            return substr_count($this->data, "\n", 0, min($this->char, $this->EOF)) + 1;
+        } else {
+            // If the string is empty, we are on the first line (sorta).
+            return 1;
+        }
+    }
+
+    /**
+     * Returns the current column of the current line that the tokenizer is at.
+     */
+    public function getColumnOffset() {
+        // strrpos is weird, and the offset needs to be negative for what we
+        // want (i.e., the last \n before $this->char). This needs to not have
+        // one (to make it point to the next character, the one we want the
+        // position of) added to it because strrpos's behaviour includes the
+        // final offset byte.
+        $lastLine = strrpos($this->data, "\n", $this->char - 1 - strlen($this->data));
+
+        // However, for here we want the length up until the next byte to be
+        // processed, so add one to the current byte ($this->char).
+        if($lastLine !== false) {
+            $findLengthOf = substr($this->data, $lastLine + 1, $this->char - 1 - $lastLine);
+        } else {
+            $findLengthOf = substr($this->data, 0, $this->char);
+        }
+
+        // Get the length for the string we need.
+        if(extension_loaded('iconv')) {
+            return iconv_strlen($findLengthOf, 'utf-8');
+        } elseif(extension_loaded('mbstring')) {
+            return mb_strlen($findLengthOf, 'utf-8');
+        } elseif(extension_loaded('xml')) {
+            return strlen(utf8_decode($findLengthOf));
+        } else {
+            $count = count_chars($findLengthOf);
+            // 0x80 = 0x7F - 0 + 1 (one added to get inclusive range)
+            // 0x33 = 0xF4 - 0x2C + 1 (one added to get inclusive range)
+            return array_sum(array_slice($count, 0, 0x80)) +
+                   array_sum(array_slice($count, 0xC2, 0x33));
+        }
+    }
+
+    /**
+     * Retrieve the currently consume character.
+     * @note This performs bounds checking
+     */
+    public function char() {
+        return ($this->char++ < $this->EOF)
+            ? $this->data[$this->char - 1]
+            : false;
+    }
+
+    /**
+     * Get all characters until EOF.
+     * @note This performs bounds checking
+     */
+    public function remainingChars() {
+        if($this->char < $this->EOF) {
+            $data = substr($this->data, $this->char);
+            $this->char = $this->EOF;
+            return $data;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Matches as far as possible until we reach a certain set of bytes
+     * and returns the matched substring.
+     * @param $bytes Bytes to match.
+     */
+    public function charsUntil($bytes, $max = null) {
+        if ($this->char < $this->EOF) {
+            if ($max === 0 || $max) {
+                $len = strcspn($this->data, $bytes, $this->char, $max);
+            } else {
+                $len = strcspn($this->data, $bytes, $this->char);
+            }
+            $string = (string) substr($this->data, $this->char, $len);
+            $this->char += $len;
+            return $string;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Matches as far as possible with a certain set of bytes
+     * and returns the matched substring.
+     * @param $bytes Bytes to match.
+     */
+    public function charsWhile($bytes, $max = null) {
+        if ($this->char < $this->EOF) {
+            if ($max === 0 || $max) {
+                $len = strspn($this->data, $bytes, $this->char, $max);
+            } else {
+                $len = strspn($this->data, $bytes, $this->char);
+            }
+            $string = (string) substr($this->data, $this->char, $len);
+            $this->char += $len;
+            return $string;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Unconsume one character.
+     */
+    public function unget() {
+        if ($this->char <= $this->EOF) {
+            $this->char--;
+        }
+    }
+}
diff --git a/library/HTML5/Parser.php b/library/HTML5/Parser.php
new file mode 100644
index 000000000..5f9ca560e
--- /dev/null
+++ b/library/HTML5/Parser.php
@@ -0,0 +1,36 @@
+<?php
+
+require_once dirname(__FILE__) . '/Data.php';
+require_once dirname(__FILE__) . '/InputStream.php';
+require_once dirname(__FILE__) . '/TreeBuilder.php';
+require_once dirname(__FILE__) . '/Tokenizer.php';
+
+/**
+ * Outwards facing interface for HTML5.
+ */
+class HTML5_Parser
+{
+    /**
+     * Parses a full HTML document.
+     * @param $text HTML text to parse
+     * @param $builder Custom builder implementation
+     * @return Parsed HTML as DOMDocument
+     */
+    static public function parse($text, $builder = null) {
+        $tokenizer = new HTML5_Tokenizer($text, $builder);
+        $tokenizer->parse();
+        return $tokenizer->save();
+    }
+    /**
+     * Parses an HTML fragment.
+     * @param $text HTML text to parse
+     * @param $context String name of context element to pretend parsing is in.
+     * @param $builder Custom builder implementation
+     * @return Parsed HTML as DOMDocument
+     */
+    static public function parseFragment($text, $context = null, $builder = null) {
+        $tokenizer = new HTML5_Tokenizer($text, $builder);
+        $tokenizer->parseFragment($context);
+        return $tokenizer->save();
+    }
+}
diff --git a/library/HTML5/Tokenizer.php b/library/HTML5/Tokenizer.php
new file mode 100644
index 000000000..06c73065f
--- /dev/null
+++ b/library/HTML5/Tokenizer.php
@@ -0,0 +1,2307 @@
+<?php
+
+/*
+
+Copyright 2007 Jeroen van der Meer <http://jero.net/>
+Copyright 2008 Edward Z. Yang <http://htmlpurifier.org/>
+Copyright 2009 Geoffrey Sneddon <http://gsnedders.com/>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+// Some conventions:
+// /* */ indicates verbatim text from the HTML 5 specification
+// // indicates regular comments
+
+// all flags are in hyphenated form
+
+class HTML5_Tokenizer {
+    /**
+     * Points to an InputStream object.
+     */
+    protected $stream;
+
+    /**
+     * Tree builder that the tokenizer emits token to.
+     */
+    private $tree;
+
+    /**
+     * Current content model we are parsing as.
+     */
+    protected $content_model;
+
+    /**
+     * Current token that is being built, but not yet emitted. Also
+     * is the last token emitted, if applicable.
+     */
+    protected $token;
+
+    // These are constants describing the content model
+    const PCDATA    = 0;
+    const RCDATA    = 1;
+    const CDATA     = 2;
+    const PLAINTEXT = 3;
+
+    // These are constants describing tokens
+    // XXX should probably be moved somewhere else, probably the
+    // HTML5 class.
+    const DOCTYPE        = 0;
+    const STARTTAG       = 1;
+    const ENDTAG         = 2;
+    const COMMENT        = 3;
+    const CHARACTER      = 4;
+    const SPACECHARACTER = 5;
+    const EOF            = 6;
+    const PARSEERROR     = 7;
+
+    // These are constants representing bunches of characters.
+    const ALPHA       = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+    const UPPER_ALPHA = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+    const LOWER_ALPHA = 'abcdefghijklmnopqrstuvwxyz';
+    const DIGIT       = '0123456789';
+    const HEX         = '0123456789ABCDEFabcdef';
+    const WHITESPACE  = "\t\n\x0c ";
+
+    /**
+     * @param $data Data to parse
+     */
+    public function __construct($data, $builder = null) {
+        $this->stream = new HTML5_InputStream($data);
+        if (!$builder) $this->tree = new HTML5_TreeBuilder;
+        $this->content_model = self::PCDATA;
+    }
+
+    public function parseFragment($context = null) {
+        $this->tree->setupContext($context);
+        if ($this->tree->content_model) {
+            $this->content_model = $this->tree->content_model;
+            $this->tree->content_model = null;
+        }
+        $this->parse();
+    }
+
+    // XXX maybe convert this into an iterator? regardless, this function
+    // and the save function should go into a Parser facade of some sort
+    /**
+     * Performs the actual parsing of the document.
+     */
+    public function parse() {
+        // Current state
+        $state = 'data';
+        // This is used to avoid having to have look-behind in the data state.
+        $lastFourChars = '';
+        /**
+         * Escape flag as specified by the HTML5 specification: "used to
+         * control the behavior of the tokeniser. It is either true or
+         * false, and initially must be set to the false state."
+         */
+        $escape = false;
+        //echo "\n\n";
+        while($state !== null) {
+            
+            /*echo $state . ' ';
+            switch ($this->content_model) {
+                case self::PCDATA: echo 'PCDATA'; break;
+                case self::RCDATA: echo 'RCDATA'; break;
+                case self::CDATA: echo 'CDATA'; break;
+                case self::PLAINTEXT: echo 'PLAINTEXT'; break;
+            }
+            if ($escape) echo " escape";
+            echo "\n";*/
+            
+            switch($state) {
+                case 'data':
+
+                    /* Consume the next input character */
+                    $char = $this->stream->char();
+                    $lastFourChars .= $char;
+                    if (strlen($lastFourChars) > 4) $lastFourChars = substr($lastFourChars, -4);
+
+                    // see below for meaning
+                    $hyp_cond = 
+                        !$escape &&
+                        (
+                            $this->content_model === self::RCDATA ||
+                            $this->content_model === self::CDATA
+                        );
+                    $amp_cond =
+                        !$escape &&
+                        (
+                            $this->content_model === self::PCDATA ||
+                            $this->content_model === self::RCDATA
+                        );
+                    $lt_cond =
+                        $this->content_model === self::PCDATA ||
+                        (
+                            (
+                                $this->content_model === self::RCDATA ||
+                                $this->content_model === self::CDATA
+                             ) &&
+                             !$escape
+                        );
+                    $gt_cond = 
+                        $escape &&
+                        (
+                            $this->content_model === self::RCDATA ||
+                            $this->content_model === self::CDATA
+                        );
+
+                    if($char === '&' && $amp_cond) {
+                        /* U+0026 AMPERSAND (&)
+                        When the content model flag is set to one of the PCDATA or RCDATA
+                        states and the escape flag is false: switch to the
+                        character reference data state. Otherwise: treat it as per
+                        the "anything else" entry below. */
+                        $state = 'characterReferenceData';
+
+                    } elseif(
+                        $char === '-' &&
+                        $hyp_cond &&
+                        $lastFourChars === '<!--'
+                    ) {
+                        /*
+                        U+002D HYPHEN-MINUS (-)
+                        If the content model flag is set to either the RCDATA state or
+                        the CDATA state, and the escape flag is false, and there are at
+                        least three characters before this one in the input stream, and the
+                        last four characters in the input stream, including this one, are
+                        U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,
+                        and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
+                        $escape = true;
+
+                        /* In any case, emit the input character as a character token. Stay
+                        in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::CHARACTER,
+                            'data' => '-'
+                        ));
+                        // We do the "any case" part as part of "anything else".
+
+                    /* U+003C LESS-THAN SIGN (<) */
+                    } elseif($char === '<' && $lt_cond) {
+                        /* When the content model flag is set to the PCDATA state: switch
+                        to the tag open state.
+
+                        When the content model flag is set to either the RCDATA state or
+                        the CDATA state and the escape flag is false: switch to the tag
+                        open state.
+
+                        Otherwise: treat it as per the "anything else" entry below. */
+                        $state = 'tagOpen';
+
+                    /* U+003E GREATER-THAN SIGN (>) */
+                    } elseif(
+                        $char === '>' &&
+                        $gt_cond &&
+                        substr($lastFourChars, 1) === '-->'
+                    ) {
+                        /* If the content model flag is set to either the RCDATA state or
+                        the CDATA state, and the escape flag is true, and the last three
+                        characters in the input stream including this one are U+002D
+                        HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),
+                        set the escape flag to false. */
+                        $escape = false;
+
+                        /* In any case, emit the input character as a character token.
+                        Stay in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::CHARACTER,
+                            'data' => '>'
+                        ));
+                        // We do the "any case" part as part of "anything else".
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Emit an end-of-file token. */
+                        $state = null;
+                        $this->tree->emitToken(array(
+                            'type' => self::EOF
+                        ));
+                    
+                    } elseif($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        // Directly after emitting a token you switch back to the "data
+                        // state". At that point spaceCharacters are important so they are
+                        // emitted separately.
+                        $chars = $this->stream->charsWhile(self::WHITESPACE);
+                        $this->emitToken(array(
+                            'type' => self::SPACECHARACTER,
+                            'data' => $char . $chars
+                        ));
+                        $lastFourChars .= $chars;
+                        if (strlen($lastFourChars) > 4) $lastFourChars = substr($lastFourChars, -4);
+
+                    } else {
+                        /* Anything else
+                        THIS IS AN OPTIMIZATION: Get as many character that
+                        otherwise would also be treated as a character token and emit it
+                        as a single character token. Stay in the data state. */
+                        
+                        $mask = '';
+                        if ($hyp_cond) $mask .= '-';
+                        if ($amp_cond) $mask .= '&';
+                        if ($lt_cond)  $mask .= '<';
+                        if ($gt_cond)  $mask .= '>';
+
+                        if ($mask === '') {
+                            $chars = $this->stream->remainingChars();
+                        } else {
+                            $chars = $this->stream->charsUntil($mask);
+                        }
+
+                        $this->emitToken(array(
+                            'type' => self::CHARACTER,
+                            'data' => $char . $chars
+                        ));
+
+                        $lastFourChars .= $chars;
+                        if (strlen($lastFourChars) > 4) $lastFourChars = substr($lastFourChars, -4);
+
+                        $state = 'data';
+                    }
+                break;
+
+                case 'characterReferenceData':
+                    /* (This cannot happen if the content model flag
+                    is set to the CDATA state.) */
+
+                    /* Attempt to consume a character reference, with no
+                    additional allowed character. */
+                    $entity = $this->consumeCharacterReference();
+
+                    /* If nothing is returned, emit a U+0026 AMPERSAND
+                    character token. Otherwise, emit the character token that
+                    was returned. */
+                    // This is all done when consuming the character reference.
+                    $this->emitToken(array(
+                        'type' => self::CHARACTER,
+                        'data' => $entity
+                    ));
+
+                    /* Finally, switch to the data state. */
+                    $state = 'data';
+                break;
+
+                case 'tagOpen':
+                    $char = $this->stream->char();
+
+                    switch($this->content_model) {
+                        case self::RCDATA:
+                        case self::CDATA:
+                            /* Consume the next input character. If it is a
+                            U+002F SOLIDUS (/) character, switch to the close
+                            tag open state. Otherwise, emit a U+003C LESS-THAN
+                            SIGN character token and reconsume the current input
+                            character in the data state. */
+                            // We consumed above.
+
+                            if($char === '/') {
+                                $state = 'closeTagOpen';
+
+                            } else {
+                                $this->emitToken(array(
+                                    'type' => self::CHARACTER,
+                                    'data' => '<'
+                                ));
+
+                                $this->stream->unget();
+
+                                $state = 'data';
+                            }
+                        break;
+
+                        case self::PCDATA:
+                            /* If the content model flag is set to the PCDATA state
+                            Consume the next input character: */
+                            // We consumed above.
+
+                            if($char === '!') {
+                                /* U+0021 EXCLAMATION MARK (!)
+                                Switch to the markup declaration open state. */
+                                $state = 'markupDeclarationOpen';
+
+                            } elseif($char === '/') {
+                                /* U+002F SOLIDUS (/)
+                                Switch to the close tag open state. */
+                                $state = 'closeTagOpen';
+
+                            } elseif('A' <= $char && $char <= 'Z') {
+                                /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
+                                Create a new start tag token, set its tag name to the lowercase
+                                version of the input character (add 0x0020 to the character's code
+                                point), then switch to the tag name state. (Don't emit the token
+                                yet; further details will be filled in before it is emitted.) */
+                                $this->token = array(
+                                    'name'  => strtolower($char),
+                                    'type'  => self::STARTTAG,
+                                    'attr'  => array()
+                                );
+
+                                $state = 'tagName';
+
+                            } elseif('a' <= $char && $char <= 'z') {
+                                /* U+0061 LATIN SMALL LETTER A through to U+007A LATIN SMALL LETTER Z
+                                Create a new start tag token, set its tag name to the input
+                                character, then switch to the tag name state. (Don't emit
+                                the token yet; further details will be filled in before it
+                                is emitted.) */
+                                $this->token = array(
+                                    'name'  => $char,
+                                    'type'  => self::STARTTAG,
+                                    'attr'  => array()
+                                );
+
+                                $state = 'tagName';
+
+                            } elseif($char === '>') {
+                                /* U+003E GREATER-THAN SIGN (>)
+                                Parse error. Emit a U+003C LESS-THAN SIGN character token and a
+                                U+003E GREATER-THAN SIGN character token. Switch to the data state. */
+                                $this->emitToken(array(
+                                    'type' => self::PARSEERROR,
+                                    'data' => 'expected-tag-name-but-got-right-bracket'
+                                ));
+                                $this->emitToken(array(
+                                    'type' => self::CHARACTER,
+                                    'data' => '<>'
+                                ));
+
+                                $state = 'data';
+
+                            } elseif($char === '?') {
+                                /* U+003F QUESTION MARK (?)
+                                Parse error. Switch to the bogus comment state. */
+                                $this->emitToken(array(
+                                    'type' => self::PARSEERROR,
+                                    'data' => 'expected-tag-name-but-got-question-mark'
+                                ));
+                                $this->token = array(
+                                    'data' => '?',
+                                    'type' => self::COMMENT
+                                );
+                                $state = 'bogusComment';
+
+                            } else {
+                                /* Anything else
+                                Parse error. Emit a U+003C LESS-THAN SIGN character token and
+                                reconsume the current input character in the data state. */
+                                $this->emitToken(array(
+                                    'type' => self::PARSEERROR,
+                                    'data' => 'expected-tag-name'
+                                ));
+                                $this->emitToken(array(
+                                    'type' => self::CHARACTER,
+                                    'data' => '<'
+                                ));
+
+                                $state = 'data';
+                                $this->stream->unget();
+                            }
+                        break;
+                    }
+                break;
+
+                case 'closeTagOpen':
+                    if (
+                        $this->content_model === self::RCDATA ||
+                        $this->content_model === self::CDATA
+                    ) {
+                        /* If the content model flag is set to the RCDATA or CDATA
+                        states... */
+                        $name = strtolower($this->stream->charsWhile(self::ALPHA));
+                        $following = $this->stream->char();
+                        $this->stream->unget();
+                        if (
+                            !$this->token ||
+                            $this->token['name'] !== $name ||
+                            $this->token['name'] === $name && !in_array($following, array("\x09", "\x0A", "\x0C", "\x20", "\x3E", "\x2F", false))
+                        ) {
+                            /* if no start tag token has ever been emitted by this instance
+                            of the tokenizer (fragment case), or, if the next few
+                            characters do not match the tag name of the last start tag
+                            token emitted (compared in an ASCII case-insensitive manner),
+                            or if they do but they are not immediately followed by one of
+                            the following characters:
+
+                                * U+0009 CHARACTER TABULATION
+                                * U+000A LINE FEED (LF)
+                                * U+000C FORM FEED (FF)
+                                * U+0020 SPACE
+                                * U+003E GREATER-THAN SIGN (>)
+                                * U+002F SOLIDUS (/)
+                                * EOF
+
+                            ...then emit a U+003C LESS-THAN SIGN character token, a
+                            U+002F SOLIDUS character token, and switch to the data
+                            state to process the next input character. */
+                            // XXX: Probably ought to replace in_array with $following === x ||...
+
+                            // We also need to emit $name now we've consumed that, as we
+                            // know it'll just be emitted as a character token.
+                            $this->emitToken(array(
+                                'type' => self::CHARACTER,
+                                'data' => '</' . $name
+                            ));
+
+                            $state = 'data';
+                        } else {
+                            // This matches what would happen if we actually did the
+                            // otherwise below (but we can't because we've consumed too
+                            // much).
+
+                            // Start the end tag token with the name we already have.
+                            $this->token = array(
+                                'name'  => $name,
+                                'type'  => self::ENDTAG
+                            );
+
+                            // Change to tag name state.
+                            $state = 'tagName';
+                        }
+                    } elseif ($this->content_model === self::PCDATA) {
+                        /* Otherwise, if the content model flag is set to the PCDATA
+                        state [...]: */
+                        $char = $this->stream->char();
+
+                        if ('A' <= $char && $char <= 'Z') {
+                            /* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
+                            Create a new end tag token, set its tag name to the lowercase version
+                            of the input character (add 0x0020 to the character's code point), then
+                            switch to the tag name state. (Don't emit the token yet; further details
+                            will be filled in before it is emitted.) */
+                            $this->token = array(
+                                'name'  => strtolower($char),
+                                'type'  => self::ENDTAG
+                            );
+
+                            $state = 'tagName';
+
+                        } elseif ('a' <= $char && $char <= 'z') {
+                            /* U+0061 LATIN SMALL LETTER A through to U+007A LATIN SMALL LETTER Z
+                            Create a new end tag token, set its tag name to the
+                            input character, then switch to the tag name state.
+                            (Don't emit the token yet; further details will be
+                            filled in before it is emitted.) */
+                            $this->token = array(
+                                'name'  => $char,
+                                'type'  => self::ENDTAG
+                            );
+
+                            $state = 'tagName';
+
+                        } elseif($char === '>') {
+                            /* U+003E GREATER-THAN SIGN (>)
+                            Parse error. Switch to the data state. */
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'expected-closing-tag-but-got-right-bracket'
+                            ));
+                            $state = 'data';
+
+                        } elseif($char === false) {
+                            /* EOF
+                            Parse error. Emit a U+003C LESS-THAN SIGN character token and a U+002F
+                            SOLIDUS character token. Reconsume the EOF character in the data state. */
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'expected-closing-tag-but-got-eof'
+                            ));
+                            $this->emitToken(array(
+                                'type' => self::CHARACTER,
+                                'data' => '</'
+                            ));
+
+                            $this->stream->unget();
+                            $state = 'data';
+
+                        } else {
+                            /* Parse error. Switch to the bogus comment state. */
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'expected-closing-tag-but-got-char'
+                            ));
+                            $this->token = array(
+                                'data' => $char,
+                                'type' => self::COMMENT
+                            );
+                            $state = 'bogusComment';
+                        }
+                    }
+                break;
+
+                case 'tagName':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                        U+000A LINE FEED (LF)
+                        U+000C FORM FEED (FF)
+                        U+0020 SPACE
+                        Switch to the before attribute name state. */
+                        $state = 'beforeAttributeName';
+
+                    } elseif($char === '/') {
+                        /* U+002F SOLIDUS (/)
+                        Switch to the self-closing start tag state. */
+                        $state = 'selfClosingStartTag';
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current tag token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif('A' <= $char && $char <= 'Z') {
+                        /* U+0041 LATIN CAPITAL LETTER A through to U+005A LATIN CAPITAL LETTER Z
+                        Append the lowercase version of the current input
+                        character (add 0x0020 to the character's code point) to
+                        the current tag token's tag name. Stay in the tag name state. */
+                        $chars = $this->stream->charsWhile(self::UPPER_ALPHA);
+
+                        $this->token['name'] .= strtolower($char . $chars);
+                        $state = 'tagName';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-tag-name'
+                        ));
+                        $this->emitToken($this->token);
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current tag token's tag name.
+                        Stay in the tag name state. */
+                        $chars = $this->stream->charsUntil("\t\n\x0C />" . self::UPPER_ALPHA);
+
+                        $this->token['name'] .= $char . $chars;
+                        $state = 'tagName';
+                    }
+                break;
+
+                case 'beforeAttributeName':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    // this conditional is optimized, check bottom
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                        U+000A LINE FEED (LF)
+                        U+000C FORM FEED (FF)
+                        U+0020 SPACE
+                        Stay in the before attribute name state. */
+                        $state = 'beforeAttributeName';
+
+                    } elseif($char === '/') {
+                        /* U+002F SOLIDUS (/)
+                        Switch to the self-closing start tag state. */
+                        $state = 'selfClosingStartTag';
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current tag token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif('A' <= $char && $char <= 'Z') {
+                        /* U+0041 LATIN CAPITAL LETTER A through to U+005A LATIN CAPITAL LETTER Z
+                        Start a new attribute in the current tag token. Set that
+                        attribute's name to the lowercase version of the current
+                        input character (add 0x0020 to the character's code
+                        point), and its value to the empty string. Switch to the
+                        attribute name state.*/
+                        $this->token['attr'][] = array(
+                            'name'  => strtolower($char),
+                            'value' => ''
+                        );
+
+                        $state = 'attributeName';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-attribute-name-but-got-eof'
+                        ));
+                        $this->emitToken($this->token);
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* U+0022 QUOTATION MARK (")
+                           U+0027 APOSTROPHE (')
+                           U+003D EQUALS SIGN (=)
+                        Parse error. Treat it as per the "anything else" entry
+                        below. */
+                        if($char === '"' || $char === "'" || $char === '=') {
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'invalid-character-in-attribute-name'
+                            ));
+                        }
+
+                        /* Anything else
+                        Start a new attribute in the current tag token. Set that attribute's
+                        name to the current input character, and its value to the empty string.
+                        Switch to the attribute name state. */
+                        $this->token['attr'][] = array(
+                            'name'  => $char,
+                            'value' => ''
+                        );
+
+                        $state = 'attributeName';
+                    }
+                break;
+
+                case 'attributeName':
+                    // Consume the next input character:
+                    $char = $this->stream->char();
+
+                    // this conditional is optimized, check bottom
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                        U+000A LINE FEED (LF)
+                        U+000C FORM FEED (FF)
+                        U+0020 SPACE
+                        Switch to the after attribute name state. */
+                        $state = 'afterAttributeName';
+
+                    } elseif($char === '/') {
+                        /* U+002F SOLIDUS (/)
+                        Switch to the self-closing start tag state. */
+                        $state = 'selfClosingStartTag';
+
+                    } elseif($char === '=') {
+                        /* U+003D EQUALS SIGN (=)
+                        Switch to the before attribute value state. */
+                        $state = 'beforeAttributeValue';
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current tag token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif('A' <= $char && $char <= 'Z') {
+                        /* U+0041 LATIN CAPITAL LETTER A through to U+005A LATIN CAPITAL LETTER Z
+                        Append the lowercase version of the current input
+                        character (add 0x0020 to the character's code point) to
+                        the current attribute's name. Stay in the attribute name
+                        state. */
+                        $chars = $this->stream->charsWhile(self::UPPER_ALPHA);
+
+                        $last = count($this->token['attr']) - 1;
+                        $this->token['attr'][$last]['name'] .= strtolower($char . $chars);
+
+                        $state = 'attributeName';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-attribute-name'
+                        ));
+                        $this->emitToken($this->token);
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* U+0022 QUOTATION MARK (")
+                           U+0027 APOSTROPHE (')
+                        Parse error. Treat it as per the "anything else"
+                        entry below. */
+                        if($char === '"' || $char === "'") {
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'invalid-character-in-attribute-name'
+                            ));
+                        }
+
+                        /* Anything else
+                        Append the current input character to the current attribute's name.
+                        Stay in the attribute name state. */
+                        $chars = $this->stream->charsUntil("\t\n\x0C /=>\"'" . self::UPPER_ALPHA);
+
+                        $last = count($this->token['attr']) - 1;
+                        $this->token['attr'][$last]['name'] .= $char . $chars;
+
+                        $state = 'attributeName';
+                    }
+
+                    /* When the user agent leaves the attribute name state
+                    (and before emitting the tag token, if appropriate), the
+                    complete attribute's name must be compared to the other
+                    attributes on the same token; if there is already an
+                    attribute on the token with the exact same name, then this
+                    is a parse error and the new attribute must be dropped, along
+                    with the value that gets associated with it (if any). */
+                    // this might be implemented in the emitToken method
+                break;
+
+                case 'afterAttributeName':
+                    // Consume the next input character:
+                    $char = $this->stream->char();
+
+                    // this is an optimized conditional, check the bottom
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                        U+000A LINE FEED (LF)
+                        U+000C FORM FEED (FF)
+                        U+0020 SPACE
+                        Stay in the after attribute name state. */
+                        $state = 'afterAttributeName';
+
+                    } elseif($char === '/') {
+                        /* U+002F SOLIDUS (/)
+                        Switch to the self-closing start tag state. */
+                        $state = 'selfClosingStartTag';
+
+                    } elseif($char === '=') {
+                        /* U+003D EQUALS SIGN (=)
+                        Switch to the before attribute value state. */
+                        $state = 'beforeAttributeValue';
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current tag token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif('A' <= $char && $char <= 'Z') {
+                        /* U+0041 LATIN CAPITAL LETTER A through to U+005A LATIN CAPITAL LETTER Z
+                        Start a new attribute in the current tag token. Set that
+                        attribute's name to the lowercase version of the current
+                        input character (add 0x0020 to the character's code
+                        point), and its value to the empty string. Switch to the
+                        attribute name state. */
+                        $this->token['attr'][] = array(
+                            'name'  => strtolower($char),
+                            'value' => ''
+                        );
+
+                        $state = 'attributeName';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-end-of-tag-but-got-eof'
+                        ));
+                        $this->emitToken($this->token);
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* U+0022 QUOTATION MARK (")
+                           U+0027 APOSTROPHE (')
+                        Parse error. Treat it as per the "anything else"
+                        entry below. */
+                        if($char === '"' || $char === "'") {
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'invalid-character-after-attribute-name'
+                            ));
+                        }
+
+                        /* Anything else
+                        Start a new attribute in the current tag token. Set that attribute's
+                        name to the current input character, and its value to the empty string.
+                        Switch to the attribute name state. */
+                        $this->token['attr'][] = array(
+                            'name'  => $char,
+                            'value' => ''
+                        );
+
+                        $state = 'attributeName';
+                    }
+                break;
+
+                case 'beforeAttributeValue':
+                    // Consume the next input character:
+                    $char = $this->stream->char();
+
+                    // this is an optimized conditional
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                        U+000A LINE FEED (LF)
+                        U+000C FORM FEED (FF)
+                        U+0020 SPACE
+                        Stay in the before attribute value state. */
+                        $state = 'beforeAttributeValue';
+
+                    } elseif($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Switch to the attribute value (double-quoted) state. */
+                        $state = 'attributeValueDoubleQuoted';
+
+                    } elseif($char === '&') {
+                        /* U+0026 AMPERSAND (&)
+                        Switch to the attribute value (unquoted) state and reconsume
+                        this input character. */
+                        $this->stream->unget();
+                        $state = 'attributeValueUnquoted';
+
+                    } elseif($char === '\'') {
+                        /* U+0027 APOSTROPHE (')
+                        Switch to the attribute value (single-quoted) state. */
+                        $state = 'attributeValueSingleQuoted';
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Emit the current tag token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-attribute-value-but-got-right-bracket'
+                        ));
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume
+                        the character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-attribute-value-but-got-eof'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* U+003D EQUALS SIGN (=)
+                        Parse error. Treat it as per the "anything else" entry below. */
+                        if($char === '=') {
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'equals-in-unquoted-attribute-value'
+                            ));
+                        }
+
+                        /* Anything else
+                        Append the current input character to the current attribute's value.
+                        Switch to the attribute value (unquoted) state. */
+                        $last = count($this->token['attr']) - 1;
+                        $this->token['attr'][$last]['value'] .= $char;
+
+                        $state = 'attributeValueUnquoted';
+                    }
+                break;
+
+                case 'attributeValueDoubleQuoted':
+                    // Consume the next input character:
+                    $char = $this->stream->char();
+
+                    if($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Switch to the after attribute value (quoted) state. */
+                        $state = 'afterAttributeValueQuoted';
+
+                    } elseif($char === '&') {
+                        /* U+0026 AMPERSAND (&)
+                        Switch to the character reference in attribute value
+                        state, with the additional allowed character
+                        being U+0022 QUOTATION MARK ("). */
+                        $this->characterReferenceInAttributeValue('"');
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the character
+                        in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-attribute-value-double-quote'
+                        ));
+                        $this->emitToken($this->token);
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current attribute's value.
+                        Stay in the attribute value (double-quoted) state. */
+                        $chars = $this->stream->charsUntil('"&');
+
+                        $last = count($this->token['attr']) - 1;
+                        $this->token['attr'][$last]['value'] .= $char . $chars;
+
+                        $state = 'attributeValueDoubleQuoted';
+                    }
+                break;
+
+                case 'attributeValueSingleQuoted':
+                    // Consume the next input character:
+                    $char = $this->stream->char();
+
+                    if($char === "'") {
+                        /* U+0022 QUOTATION MARK (')
+                        Switch to the after attribute value state. */
+                        $state = 'afterAttributeValueQuoted';
+
+                    } elseif($char === '&') {
+                        /* U+0026 AMPERSAND (&)
+                        Switch to the entity in attribute value state. */
+                        $this->characterReferenceInAttributeValue("'");
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the character
+                        in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-attribute-value-single-quote'
+                        ));
+                        $this->emitToken($this->token);
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current attribute's value.
+                        Stay in the attribute value (single-quoted) state. */
+                        $chars = $this->stream->charsUntil("'&");
+
+                        $last = count($this->token['attr']) - 1;
+                        $this->token['attr'][$last]['value'] .= $char . $chars;
+
+                        $state = 'attributeValueSingleQuoted';
+                    }
+                break;
+
+                case 'attributeValueUnquoted':
+                    // Consume the next input character:
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                        U+000A LINE FEED (LF)
+                        U+000C FORM FEED (FF)
+                        U+0020 SPACE
+                        Switch to the before attribute name state. */
+                        $state = 'beforeAttributeName';
+
+                    } elseif($char === '&') {
+                        /* U+0026 AMPERSAND (&)
+                        Switch to the entity in attribute value state. */
+                        $this->characterReferenceInAttributeValue();
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current tag token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume
+                        the character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-attribute-value-no-quotes'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* U+0022 QUOTATION MARK (")
+                           U+0027 APOSTROPHE (')
+                           U+003D EQUALS SIGN (=)
+                        Parse error. Treat it as per the "anything else"
+                        entry below. */
+                        if($char === '"' || $char === "'" || $char === '=') {
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'unexpected-character-in-unquoted-attribute-value'
+                            ));
+                        }
+
+                        /* Anything else
+                        Append the current input character to the current attribute's value.
+                        Stay in the attribute value (unquoted) state. */
+                        $chars = $this->stream->charsUntil("\t\n\x0c &>\"'=");
+
+                        $last = count($this->token['attr']) - 1;
+                        $this->token['attr'][$last]['value'] .= $char . $chars;
+
+                        $state = 'attributeValueUnquoted';
+                    }
+                break;
+
+                case 'afterAttributeValueQuoted':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Switch to the before attribute name state. */
+                        $state = 'beforeAttributeName';
+
+                    } elseif ($char === '/') {
+                        /* U+002F SOLIDUS (/)
+                        Switch to the self-closing start tag state. */
+                        $state = 'selfClosingStartTag';
+
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current tag token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-EOF-after-attribute-value'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Parse error. Reconsume the character in the before attribute
+                        name state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-character-after-attribute-value'
+                        ));
+                        $this->stream->unget();
+                        $state = 'beforeAttributeName';
+                    }
+                break;
+
+                case 'selfClosingStartTag':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Set the self-closing flag of the current tag token.
+                        Emit the current tag token. Switch to the data state. */
+                        // not sure if this is the name we want
+                        $this->token['self-closing'] = true;
+                        /* When an end tag token is emitted with its self-closing flag set,
+                        that is a parse error. */
+                        if ($this->token['type'] === self::ENDTAG) {
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'self-closing-end-tag'
+                            ));
+                        }
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Emit the current tag token. Reconsume the
+                        EOF character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-eof-after-self-closing'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Parse error. Reconsume the character in the before attribute name state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-character-after-self-closing'
+                        ));
+                        $this->stream->unget();
+                        $state = 'beforeAttributeName';
+                    }
+                break;
+
+                case 'bogusComment':
+                    /* (This can only happen if the content model flag is set to the PCDATA state.) */
+                    /* Consume every character up to the first U+003E GREATER-THAN SIGN
+                    character (>) or the end of the file (EOF), whichever comes first. Emit
+                    a comment token whose data is the concatenation of all the characters
+                    starting from and including the character that caused the state machine
+                    to switch into the bogus comment state, up to and including the last
+                    consumed character before the U+003E character, if any, or up to the
+                    end of the file otherwise. (If the comment was started by the end of
+                    the file (EOF), the token is empty.) */
+                    $this->token['data'] .= (string) $this->stream->charsUntil('>');
+                    $this->stream->char();
+
+                    $this->emitToken($this->token);
+
+                    /* Switch to the data state. */
+                    $state = 'data';
+                break;
+
+                case 'markupDeclarationOpen':
+                    // Consume for below
+                    $hyphens = $this->stream->charsWhile('-', 2);
+                    if ($hyphens === '-') {
+                        $this->stream->unget();
+                    }
+                    if ($hyphens !== '--') {
+                        $alpha = $this->stream->charsWhile(self::ALPHA, 7);
+                    }
+
+                    /* If the next two characters are both U+002D HYPHEN-MINUS (-)
+                    characters, consume those two characters, create a comment token whose
+                    data is the empty string, and switch to the comment state. */
+                    if($hyphens === '--') {
+                        $state = 'commentStart';
+                        $this->token = array(
+                            'data' => '',
+                            'type' => self::COMMENT
+                        );
+
+                    /* Otherwise if the next seven characters are a case-insensitive match
+                    for the word "DOCTYPE", then consume those characters and switch to the
+                    DOCTYPE state. */
+                    } elseif(strtoupper($alpha) === 'DOCTYPE') {
+                        $state = 'doctype';
+
+                    // XXX not implemented
+                    /* Otherwise, if the insertion mode is "in foreign content"
+                    and the current node is not an element in the HTML namespace
+                    and the next seven characters are an ASCII case-sensitive
+                    match for the string "[CDATA[" (the five uppercase letters
+                    "CDATA" with a U+005B LEFT SQUARE BRACKET character before
+                    and after), then consume those characters and switch to the
+                    CDATA section state (which is unrelated to the content model
+                    flag's CDATA state). */
+
+                    /* Otherwise, is is a parse error. Switch to the bogus comment state.
+                    The next character that is consumed, if any, is the first character
+                    that will be in the comment. */
+                    } else {
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-dashes-or-doctype'
+                        ));
+                        $this->token = array(
+                            'data' => (string) $alpha,
+                            'type' => self::COMMENT
+                        );
+                        $state = 'bogusComment';
+                    }
+                break;
+
+                case 'commentStart':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === '-') {
+                        /* U+002D HYPHEN-MINUS (-)
+                        Switch to the comment start dash state. */
+                        $state = 'commentStartDash';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Emit the comment token. Switch to the
+                        data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'incorrect-comment'
+                        ));
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Emit the comment token. Reconsume the
+                        EOF character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-comment'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Append the input character to the comment token's
+                        data. Switch to the comment state. */
+                        $this->token['data'] .= $char;
+                        $state = 'comment';
+                    }
+                break;
+
+                case 'commentStartDash':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+                    if ($char === '-') {
+                        /* U+002D HYPHEN-MINUS (-)
+                        Switch to the comment end state */
+                        $state = 'commentEnd';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Emit the comment token. Switch to the
+                        data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'incorrect-comment'
+                        ));
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* Parse error. Emit the comment token. Reconsume the
+                        EOF character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-comment'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        $this->token['data'] .= '-' . $char;
+                        $state = 'comment';
+                    }
+                break;
+
+                case 'comment':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === '-') {
+                        /* U+002D HYPHEN-MINUS (-)
+                        Switch to the comment end dash state */
+                        $state = 'commentEndDash';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the comment token. Reconsume the EOF character
+                        in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-comment'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Append the input character to the comment token's data. Stay in
+                        the comment state. */
+                        $chars = $this->stream->charsUntil('-');
+
+                        $this->token['data'] .= $char . $chars;
+                    }
+                break;
+
+                case 'commentEndDash':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === '-') {
+                        /* U+002D HYPHEN-MINUS (-)
+                        Switch to the comment end state  */
+                        $state = 'commentEnd';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the comment token. Reconsume the EOF character
+                        in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-comment-end-dash'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Append a U+002D HYPHEN-MINUS (-) character and the input
+                        character to the comment token's data. Switch to the comment state. */
+                        $this->token['data'] .= '-'.$char;
+                        $state = 'comment';
+                    }
+                break;
+
+                case 'commentEnd':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the comment token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif($char === '-') {
+                        /* U+002D HYPHEN-MINUS (-)
+                        Parse error. Append a U+002D HYPHEN-MINUS (-) character
+                        to the comment token's data. Stay in the comment end
+                        state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-dash-after-double-dash-in-comment'
+                        ));
+                        $this->token['data'] .= '-';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Emit the comment token. Reconsume the
+                        EOF character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-comment-double-dash'
+                        ));
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Parse error. Append two U+002D HYPHEN-MINUS (-)
+                        characters and the input character to the comment token's
+                        data. Switch to the comment state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-char-in-comment'
+                        ));
+                        $this->token['data'] .= '--'.$char;
+                        $state = 'comment';
+                    }
+                break;
+
+                case 'doctype':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Switch to the before DOCTYPE name state. */
+                        $state = 'beforeDoctypeName';
+
+                    } else {
+                        /* Anything else
+                        Parse error. Reconsume the current character in the
+                        before DOCTYPE name state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'need-space-after-doctype'
+                        ));
+                        $this->stream->unget();
+                        $state = 'beforeDoctypeName';
+                    }
+                break;
+
+                case 'beforeDoctypeName':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Stay in the before DOCTYPE name state. */
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Create a new DOCTYPE token. Set its
+                        force-quirks flag to on. Emit the token. Switch to the
+                        data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-doctype-name-but-got-right-bracket'
+                        ));
+                        $this->emitToken(array(
+                            'name' => '',
+                            'type' => self::DOCTYPE,
+                            'force-quirks' => true,
+                            'error' => true
+                        ));
+
+                        $state = 'data';
+
+                    } elseif('A' <= $char && $char <= 'Z') {
+                        /* U+0041 LATIN CAPITAL LETTER A through to U+005A LATIN CAPITAL LETTER Z
+                        Create a new DOCTYPE token. Set the token's name to the
+                        lowercase version of the input character (add 0x0020 to
+                        the character's code point). Switch to the DOCTYPE name
+                        state. */
+                        $this->token = array(
+                            'name' => strtolower($char),
+                            'type' => self::DOCTYPE,
+                            'error' => true
+                        );
+
+                        $state = 'doctypeName';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Create a new DOCTYPE token. Set its
+                        force-quirks flag to on. Emit the token. Reconsume the
+                        EOF character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'expected-doctype-name-but-got-eof'
+                        ));
+                        $this->emitToken(array(
+                            'name' => '',
+                            'type' => self::DOCTYPE,
+                            'force-quirks' => true,
+                            'error' => true
+                        ));
+
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Create a new DOCTYPE token. Set the token's name to the
+                        current input character. Switch to the DOCTYPE name state. */
+                        $this->token = array(
+                            'name' => $char,
+                            'type' => self::DOCTYPE,
+                            'error' => true
+                        );
+
+                        $state = 'doctypeName';
+                    }
+                break;
+
+                case 'doctypeName':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Switch to the after DOCTYPE name state. */
+                        $state = 'afterDoctypeName';
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current DOCTYPE token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif('A' <= $char && $char <= 'Z') {
+                        /* U+0041 LATIN CAPITAL LETTER A through to U+005A LATIN CAPITAL LETTER Z
+                        Append the lowercase version of the input character
+                        (add 0x0020 to the character's code point) to the current
+                        DOCTYPE token's name. Stay in the DOCTYPE name state. */
+                        $this->token['name'] .= strtolower($char);
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype-name'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current
+                        DOCTYPE token's name. Stay in the DOCTYPE name state. */
+                        $this->token['name'] .= $char;
+                    }
+
+                    // XXX this is probably some sort of quirks mode designation,
+                    // check tree-builder to be sure. In general 'error' needs
+                    // to be specc'ified, this probably means removing it at the end
+                    $this->token['error'] = ($this->token['name'] === 'HTML')
+                        ? false
+                        : true;
+                break;
+
+                case 'afterDoctypeName':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Stay in the after DOCTYPE name state. */
+
+                    } elseif($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current DOCTYPE token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else */
+
+                        $nextSix = strtoupper($char . $this->stream->charsWhile(self::ALPHA, 5));
+                        if ($nextSix === 'PUBLIC') {
+                            /* If the next six characters are an ASCII
+                            case-insensitive match for the word "PUBLIC", then
+                            consume those characters and switch to the before
+                            DOCTYPE public identifier state. */
+                            $state = 'beforeDoctypePublicIdentifier';
+
+                        } elseif ($nextSix === 'SYSTEM') {
+                            /* Otherwise, if the next six characters are an ASCII
+                            case-insensitive match for the word "SYSTEM", then
+                            consume those characters and switch to the before
+                            DOCTYPE system identifier state. */
+                            $state = 'beforeDoctypeSystemIdentifier';
+
+                        } else {
+                            /* Otherwise, this is the parse error. Set the DOCTYPE
+                            token's force-quirks flag to on. Switch to the bogus
+                            DOCTYPE state. */
+                            $this->emitToken(array(
+                                'type' => self::PARSEERROR,
+                                'data' => 'expected-space-or-right-bracket-in-doctype'
+                            ));
+                            $this->token['force-quirks'] = true;
+                            $this->token['error'] = true;
+                            $state = 'bogusDoctype';
+                        }
+                    }
+                break;
+
+                case 'beforeDoctypePublicIdentifier':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Stay in the before DOCTYPE public identifier state. */
+                    } elseif ($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Set the DOCTYPE token's public identifier to the empty
+                        string (not missing), then switch to the DOCTYPE public
+                        identifier (double-quoted) state. */
+                        $this->token['public'] = '';
+                        $state = 'doctypePublicIdentifierDoubleQuoted';
+                    } elseif ($char === "'") {
+                        /* U+0027 APOSTROPHE (')
+                        Set the DOCTYPE token's public identifier to the empty
+                        string (not missing), then switch to the DOCTYPE public
+                        identifier (single-quoted) state. */
+                        $this->token['public'] = '';
+                        $state = 'doctypePublicIdentifierSingleQuoted';
+                    } elseif ($char === '>') {
+                        /* Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-end-of-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* Parse error. Set the DOCTYPE token's force-quirks
+                        flag to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Switch to the bogus DOCTYPE state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-char-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $state = 'bogusDoctype';
+                    }
+                break;
+
+                case 'doctypePublicIdentifierDoubleQuoted':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Switch to the after DOCTYPE public identifier state. */
+                        $state = 'afterDoctypePublicIdentifier';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-end-of-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current
+                        DOCTYPE token's public identifier. Stay in the DOCTYPE
+                        public identifier (double-quoted) state. */
+                        $this->token['public'] .= $char;
+                    }
+                break;
+
+                case 'doctypePublicIdentifierSingleQuoted':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === "'") {
+                        /* U+0027 APOSTROPHE (')
+                        Switch to the after DOCTYPE public identifier state. */
+                        $state = 'afterDoctypePublicIdentifier';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-end-of-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current
+                        DOCTYPE token's public identifier. Stay in the DOCTYPE
+                        public identifier (double-quoted) state. */
+                        $this->token['public'] .= $char;
+                    }
+                break;
+
+                case 'afterDoctypePublicIdentifier':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Stay in the after DOCTYPE public identifier state. */
+                    } elseif ($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Set the DOCTYPE token's system identifier to the
+                        empty string (not missing), then switch to the DOCTYPE
+                        system identifier (double-quoted) state. */
+                        $this->token['system'] = '';
+                        $state = 'doctypeSystemIdentifierDoubleQuoted';
+                    } elseif ($char === "'") {
+                        /* U+0027 APOSTROPHE (')
+                        Set the DOCTYPE token's system identifier to the
+                        empty string (not missing), then switch to the DOCTYPE
+                        system identifier (single-quoted) state. */
+                        $this->token['system'] = '';
+                        $state = 'doctypeSystemIdentifierSingleQuoted';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current DOCTYPE token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* Parse error. Set the DOCTYPE token's force-quirks
+                        flag to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Switch to the bogus DOCTYPE state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-char-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $state = 'bogusDoctype';
+                    }
+                break;
+
+                case 'beforeDoctypeSystemIdentifier':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Stay in the before DOCTYPE system identifier state. */
+                    } elseif ($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Set the DOCTYPE token's system identifier to the empty
+                        string (not missing), then switch to the DOCTYPE system
+                        identifier (double-quoted) state. */
+                        $this->token['system'] = '';
+                        $state = 'doctypeSystemIdentifierDoubleQuoted';
+                    } elseif ($char === "'") {
+                        /* U+0027 APOSTROPHE (')
+                        Set the DOCTYPE token's system identifier to the empty
+                        string (not missing), then switch to the DOCTYPE system
+                        identifier (single-quoted) state. */
+                        $this->token['system'] = '';
+                        $state = 'doctypeSystemIdentifierSingleQuoted';
+                    } elseif ($char === '>') {
+                        /* Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-char-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* Parse error. Set the DOCTYPE token's force-quirks
+                        flag to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Switch to the bogus DOCTYPE state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-char-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $state = 'bogusDoctype';
+                    }
+                break;
+
+                case 'doctypeSystemIdentifierDoubleQuoted':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === '"') {
+                        /* U+0022 QUOTATION MARK (")
+                        Switch to the after DOCTYPE system identifier state. */
+                        $state = 'afterDoctypeSystemIdentifier';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-end-of-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current
+                        DOCTYPE token's system identifier. Stay in the DOCTYPE
+                        system identifier (double-quoted) state. */
+                        $this->token['system'] .= $char;
+                    }
+                break;
+
+                case 'doctypeSystemIdentifierSingleQuoted':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === "'") {
+                        /* U+0027 APOSTROPHE (')
+                        Switch to the after DOCTYPE system identifier state. */
+                        $state = 'afterDoctypeSystemIdentifier';
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Switch to the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-end-of-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* EOF
+                        Parse error. Set the DOCTYPE token's force-quirks flag
+                        to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Append the current input character to the current
+                        DOCTYPE token's system identifier. Stay in the DOCTYPE
+                        system identifier (double-quoted) state. */
+                        $this->token['system'] .= $char;
+                    }
+                break;
+
+                case 'afterDoctypeSystemIdentifier':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if($char === "\t" || $char === "\n" || $char === "\x0c" || $char === ' ') {
+                        /* U+0009 CHARACTER TABULATION
+                           U+000A LINE FEED (LF)
+                           U+000C FORM FEED (FF)
+                           U+0020 SPACE
+                        Stay in the after DOCTYPE system identifier state. */
+                    } elseif ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the current DOCTYPE token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+                    } elseif ($char === false) {
+                        /* Parse error. Set the DOCTYPE token's force-quirks
+                        flag to on. Emit that DOCTYPE token. Reconsume the EOF
+                        character in the data state. */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'eof-in-doctype'
+                        ));
+                        $this->token['force-quirks'] = true;
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+                    } else {
+                        /* Anything else
+                        Parse error. Switch to the bogus DOCTYPE state.
+                        (This does not set the DOCTYPE token's force-quirks
+                        flag to on.) */
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'unexpected-char-in-doctype'
+                        ));
+                        $state = 'bogusDoctype';
+                    }
+                break;
+
+                case 'bogusDoctype':
+                    /* Consume the next input character: */
+                    $char = $this->stream->char();
+
+                    if ($char === '>') {
+                        /* U+003E GREATER-THAN SIGN (>)
+                        Emit the DOCTYPE token. Switch to the data state. */
+                        $this->emitToken($this->token);
+                        $state = 'data';
+
+                    } elseif($char === false) {
+                        /* EOF
+                        Emit the DOCTYPE token. Reconsume the EOF character in
+                        the data state. */
+                        $this->emitToken($this->token);
+                        $this->stream->unget();
+                        $state = 'data';
+
+                    } else {
+                        /* Anything else
+                        Stay in the bogus DOCTYPE state. */
+                    }
+                break;
+
+                // case 'cdataSection':
+
+            }
+        }
+    }
+
+    /**
+     * Returns a serialized representation of the tree.
+     */
+    public function save() {
+        return $this->tree->save();
+    }
+
+    /**
+     * Returns the input stream.
+     */
+    public function stream() {
+        return $this->stream;
+    }
+
+    private function consumeCharacterReference($allowed = false, $inattr = false) {
+        // This goes quite far against spec, and is far closer to the Python
+        // impl., mainly because we don't do the large unconsuming the spec
+        // requires.
+
+        // All consumed characters.
+        $chars = $this->stream->char();
+
+        /* This section defines how to consume a character
+        reference. This definition is used when parsing character
+        references in text and in attributes.
+
+        The behavior depends on the identity of the next character
+        (the one immediately after the U+0026 AMPERSAND character): */
+
+        if (
+            $chars[0] === "\x09" ||
+            $chars[0] === "\x0A" ||
+            $chars[0] === "\x0C" ||
+            $chars[0] === "\x20" ||
+            $chars[0] === '<' ||
+            $chars[0] === '&' ||
+            $chars === false ||
+            $chars[0] === $allowed
+        ) {
+            /* U+0009 CHARACTER TABULATION
+               U+000A LINE FEED (LF)
+               U+000C FORM FEED (FF)
+               U+0020 SPACE
+               U+003C LESS-THAN SIGN
+               U+0026 AMPERSAND
+               EOF
+               The additional allowed character, if there is one
+            Not a character reference. No characters are consumed,
+            and nothing is returned. (This is not an error, either.) */
+            // We already consumed, so unconsume.
+            $this->stream->unget();
+            return '&';
+        } elseif ($chars[0] === '#') {
+            /* Consume the U+0023 NUMBER SIGN. */
+            // Um, yeah, we already did that.
+            /* The behavior further depends on the character after
+            the U+0023 NUMBER SIGN: */
+            $chars .= $this->stream->char();
+            if (isset($chars[1]) && ($chars[1] === 'x' || $chars[1] === 'X')) {
+                /* U+0078 LATIN SMALL LETTER X
+                   U+0058 LATIN CAPITAL LETTER X */
+                /* Consume the X. */
+                // Um, yeah, we already did that.
+                /* Follow the steps below, but using the range of
+                characters U+0030 DIGIT ZERO through to U+0039 DIGIT
+                NINE, U+0061 LATIN SMALL LETTER A through to U+0066
+                LATIN SMALL LETTER F, and U+0041 LATIN CAPITAL LETTER
+                A, through to U+0046 LATIN CAPITAL LETTER F (in other
+                words, 0123456789, ABCDEF, abcdef). */
+                $char_class = self::HEX;
+                /* When it comes to interpreting the
+                number, interpret it as a hexadecimal number. */
+                $hex = true;
+            } else {
+                /* Anything else */
+                // Unconsume because we shouldn't have consumed this.
+                $chars = $chars[0];
+                $this->stream->unget();
+                /* Follow the steps below, but using the range of
+                characters U+0030 DIGIT ZERO through to U+0039 DIGIT
+                NINE (i.e. just 0123456789). */
+                $char_class = self::DIGIT;
+                /* When it comes to interpreting the number,
+                interpret it as a decimal number. */
+                $hex = false;
+            }
+
+            /* Consume as many characters as match the range of characters given above. */
+            $consumed = $this->stream->charsWhile($char_class);
+            if ($consumed === '' || $consumed === false) {
+                /* If no characters match the range, then don't consume
+                any characters (and unconsume the U+0023 NUMBER SIGN
+                character and, if appropriate, the X character). This
+                is a parse error; nothing is returned. */
+                $this->emitToken(array(
+                    'type' => self::PARSEERROR,
+                    'data' => 'expected-numeric-entity'
+                ));
+                return '&' . $chars;
+            } else {
+                /* Otherwise, if the next character is a U+003B SEMICOLON,
+                consume that too. If it isn't, there is a parse error. */
+                if ($this->stream->char() !== ';') {
+                    $this->stream->unget();
+                    $this->emitToken(array(
+                        'type' => self::PARSEERROR,
+                        'data' => 'numeric-entity-without-semicolon'
+                    ));
+                }
+
+                /* If one or more characters match the range, then take
+                them all and interpret the string of characters as a number
+                (either hexadecimal or decimal as appropriate). */
+                $codepoint = $hex ? hexdec($consumed) : (int) $consumed;
+
+                /* If that number is one of the numbers in the first column
+                of the following table, then this is a parse error. Find the
+                row with that number in the first column, and return a
+                character token for the Unicode character given in the
+                second column of that row. */
+                $new_codepoint = HTML5_Data::getRealCodepoint($codepoint);
+                if ($new_codepoint) {
+                    $this->emitToken(array(
+                        'type' => self::PARSEERROR,
+                        'data' => 'illegal-windows-1252-entity'
+                    ));
+                    $codepoint = $new_codepoint;
+                } else {
+                    /* Otherwise, if the number is in the range 0x0000 to 0x0008,
+                    U+000B,  U+000E to 0x001F,  0x007F  to 0x009F, 0xD800 to 0xDFFF ,
+                    0xFDD0 to 0xFDEF, or is one of 0xFFFE, 0xFFFF, 0x1FFFE, 0x1FFFF,
+                    0x2FFFE, 0x2FFFF, 0x3FFFE, 0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE,
+                    0x5FFFF, 0x6FFFE, 0x6FFFF, 0x7FFFE, 0x7FFFF, 0x8FFFE, 0x8FFFF,
+                    0x9FFFE, 0x9FFFF, 0xAFFFE, 0xAFFFF, 0xBFFFE, 0xBFFFF, 0xCFFFE,
+                    0xCFFFF, 0xDFFFE, 0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE, 0xFFFFF,
+                    0x10FFFE, or 0x10FFFF, or is higher than 0x10FFFF, then this
+                    is a parse error; return a character token for the U+FFFD
+                    REPLACEMENT CHARACTER character instead. */
+                    // && has higher precedence than ||
+                    if (
+                        $codepoint >= 0x0000 && $codepoint <= 0x0008 ||
+                        $codepoint === 0x000B ||
+                        $codepoint >= 0x000E && $codepoint <= 0x001F ||
+                        $codepoint >= 0x007F && $codepoint <= 0x009F ||
+                        $codepoint >= 0xD800 && $codepoint <= 0xDFFF ||
+                        $codepoint >= 0xFDD0 && $codepoint <= 0xFDEF ||
+                        ($codepoint & 0xFFFE) === 0xFFFE ||
+                        $codepoint > 0x10FFFF
+                    ) {
+                        $this->emitToken(array(
+                            'type' => self::PARSEERROR,
+                            'data' => 'illegal-codepoint-for-numeric-entity'
+                        ));
+                        $codepoint = 0xFFFD;
+                    }
+                }
+
+                /* Otherwise, return a character token for the Unicode
+                character whose code point is that number. */
+                return HTML5_Data::utf8chr($codepoint);
+            }
+
+        } else {
+            /* Anything else */
+
+            /* Consume the maximum number of characters possible,
+            with the consumed characters matching one of the
+            identifiers in the first column of the named character
+            references table (in a case-sensitive manner). */
+
+            // we will implement this by matching the longest
+            // alphanumeric + semicolon string, and then working
+            // our way backwards
+            $chars .= $this->stream->charsWhile(self::DIGIT . self::ALPHA . ';', HTML5_Data::getNamedCharacterReferenceMaxLength() - 1);
+            $len = strlen($chars);
+
+            $refs = HTML5_Data::getNamedCharacterReferences();
+            $codepoint = false;
+            for($c = $len; $c > 0; $c--) {
+                $id = substr($chars, 0, $c);
+                if(isset($refs[$id])) {
+                    $codepoint = $refs[$id];
+                    break;
+                }
+            }
+
+            /* If no match can be made, then this is a parse error.
+            No characters are consumed, and nothing is returned. */
+            if (!$codepoint) {
+                $this->emitToken(array(
+                    'type' => self::PARSEERROR,
+                    'data' => 'expected-named-entity'
+                ));
+                return '&' . $chars;
+            }
+
+            /* If the last character matched is not a U+003B SEMICOLON
+            (;), there is a parse error. */
+            $semicolon = true;
+            if (substr($id, -1) !== ';') {
+                $this->emitToken(array(
+                    'type' => self::PARSEERROR,
+                    'data' => 'named-entity-without-semicolon'
+                ));
+                $semicolon = false;
+            }
+
+
+            /* If the character reference is being consumed as part of
+            an attribute, and the last character matched is not a
+            U+003B SEMICOLON (;), and the next character is in the
+            range U+0030 DIGIT ZERO to U+0039 DIGIT NINE, U+0041
+            LATIN CAPITAL LETTER A to U+005A LATIN CAPITAL LETTER Z,
+            or U+0061 LATIN SMALL LETTER A to U+007A LATIN SMALL LETTER Z,
+            then, for historical reasons, all the characters that were
+            matched after the U+0026 AMPERSAND (&) must be unconsumed,
+            and nothing is returned. */
+            if (
+                $inattr && !$semicolon &&
+                strspn(substr($chars, $c, 1), self::ALPHA . self::DIGIT)
+            ) {
+                return '&' . $chars;
+            }
+
+            /* Otherwise, return a character token for the character
+            corresponding to the character reference name (as given
+            by the second column of the named character references table). */
+            return HTML5_Data::utf8chr($codepoint) . substr($chars, $c);
+        }
+    }
+
+    private function characterReferenceInAttributeValue($allowed = false) {
+        /* Attempt to consume a character reference. */
+        $entity = $this->consumeCharacterReference($allowed, true);
+
+        /* If nothing is returned, append a U+0026 AMPERSAND
+        character to the current attribute's value.
+
+        Otherwise, append the returned character token to the
+        current attribute's value. */
+        $char = (!$entity)
+            ? '&'
+            : $entity;
+
+        $last = count($this->token['attr']) - 1;
+        $this->token['attr'][$last]['value'] .= $char;
+
+        /* Finally, switch back to the attribute value state that you
+        were in when were switched into this state. */
+    }
+
+    /**
+     * Emits a token, passing it on to the tree builder.
+     */
+    protected function emitToken($token, $checkStream = true) {
+        if ($checkStream) {
+            // Emit errors from input stream.
+            while ($this->stream->errors) {
+                $this->emitToken(array_shift($this->stream->errors), false);
+            }
+        }
+
+        // the current structure of attributes is not a terribly good one
+        $this->tree->emitToken($token);
+
+        if(is_int($this->tree->content_model)) {
+            $this->content_model = $this->tree->content_model;
+            $this->tree->content_model = null;
+
+        } elseif($token['type'] === self::ENDTAG) {
+            $this->content_model = self::PCDATA;
+        }
+    }
+}
+
diff --git a/library/HTML5/TreeBuilder.php b/library/HTML5/TreeBuilder.php
new file mode 100644
index 000000000..03e2ee77f
--- /dev/null
+++ b/library/HTML5/TreeBuilder.php
@@ -0,0 +1,3715 @@
+<?php
+
+/*
+
+Copyright 2007 Jeroen van der Meer <http://jero.net/>
+Copyright 2009 Edward Z. Yang <edwardzyang@thewritingpot.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+// Tags for FIX ME!!!: (in order of priority)
+//      XXX - should be fixed NAO!
+//      XERROR - with regards to parse errors
+//      XSCRIPT - with regards to scripting mode
+//      XENCODING - with regards to encoding (for reparsing tests)
+
+class HTML5_TreeBuilder {
+    public $stack = array();
+    public $content_model;
+
+    private $mode;
+    private $original_mode;
+    private $secondary_mode;
+    private $dom;
+    // Whether or not normal insertion of nodes should actually foster
+    // parent (used in one case in spec)
+    private $foster_parent = false;
+    private $a_formatting  = array();
+
+    private $head_pointer = null;
+    private $form_pointer = null;
+
+    private $flag_frameset_ok = true;
+    private $flag_force_quirks = false;
+    private $ignored = false;
+    private $quirks_mode = null;
+    // this gets to 2 when we want to ignore the next lf character, and
+    // is decrement at the beginning of each processed token (this way,
+    // code can check for (bool)$ignore_lf_token, but it phases out
+    // appropriately)
+    private $ignore_lf_token = 0;
+    private $fragment = false;
+    private $root;
+
+    private $scoping = array('applet','button','caption','html','marquee','object','table','td','th', 'svg:foreignObject');
+    private $formatting = array('a','b','big','code','em','font','i','nobr','s','small','strike','strong','tt','u');
+    private $special = array('address','area','article','aside','base','basefont','bgsound',
+    'blockquote','body','br','center','col','colgroup','command','dd','details','dialog','dir','div','dl',
+    'dt','embed','fieldset','figure','footer','form','frame','frameset','h1','h2','h3','h4','h5',
+    'h6','head','header','hgroup','hr','iframe','img','input','isindex','li','link',
+    'listing','menu','meta','nav','noembed','noframes','noscript','ol',
+    'p','param','plaintext','pre','script','select','spacer','style',
+    'tbody','textarea','tfoot','thead','title','tr','ul','wbr');
+
+    // Tree construction modes
+    const INITIAL           = 0;
+    const BEFORE_HTML       = 1;
+    const BEFORE_HEAD       = 2;
+    const IN_HEAD           = 3;
+    const IN_HEAD_NOSCRIPT  = 4;
+    const AFTER_HEAD        = 5;
+    const IN_BODY           = 6;
+    const IN_CDATA_RCDATA   = 7;
+    const IN_TABLE          = 8;
+    const IN_CAPTION        = 9;
+    const IN_COLUMN_GROUP   = 10;
+    const IN_TABLE_BODY     = 11;
+    const IN_ROW            = 12;
+    const IN_CELL           = 13;
+    const IN_SELECT         = 14;
+    const IN_SELECT_IN_TABLE= 15;
+    const IN_FOREIGN_CONTENT= 16;
+    const AFTER_BODY        = 17;
+    const IN_FRAMESET       = 18;
+    const AFTER_FRAMESET    = 19;
+    const AFTER_AFTER_BODY  = 20;
+    const AFTER_AFTER_FRAMESET = 21;
+
+    /**
+     * Converts a magic number to a readable name. Use for debugging.
+     */
+    private function strConst($number) {
+        static $lookup;
+        if (!$lookup) {
+            $r = new ReflectionClass('HTML5_TreeBuilder');
+            $lookup = array_flip($r->getConstants());
+        }
+        return $lookup[$number];
+    }
+
+    // The different types of elements.
+    const SPECIAL    = 100;
+    const SCOPING    = 101;
+    const FORMATTING = 102;
+    const PHRASING   = 103;
+
+    // Quirks modes in $quirks_mode
+    const NO_QUIRKS             = 200;
+    const QUIRKS_MODE           = 201;
+    const LIMITED_QUIRKS_MODE   = 202;
+
+    // Marker to be placed in $a_formatting
+    const MARKER     = 300;
+
+    // Namespaces for foreign content
+    const NS_HTML   = null; // to prevent DOM from requiring NS on everything
+    const NS_MATHML = 'http://www.w3.org/1998/Math/MathML';
+    const NS_SVG    = 'http://www.w3.org/2000/svg';
+    const NS_XLINK  = 'http://www.w3.org/1999/xlink';
+    const NS_XML    = 'http://www.w3.org/XML/1998/namespace';
+    const NS_XMLNS  = 'http://www.w3.org/2000/xmlns/';
+
+    public function __construct() {
+        $this->mode = self::INITIAL;
+        $this->dom = new DOMDocument;
+
+        $this->dom->encoding = 'UTF-8';
+        $this->dom->preserveWhiteSpace = true;
+        $this->dom->substituteEntities = true;
+        $this->dom->strictErrorChecking = false;
+    }
+
+    // Process tag tokens
+    public function emitToken($token, $mode = null) {
+        // XXX: ignore parse errors... why are we emitting them, again?
+        if ($token['type'] === HTML5_Tokenizer::PARSEERROR) return;
+        if ($mode === null) $mode = $this->mode;
+
+        /*
+        $backtrace = debug_backtrace();
+        if ($backtrace[1]['class'] !== 'HTML5_TreeBuilder') echo "--\n";
+        echo $this->strConst($mode);
+        if ($this->original_mode) echo " (originally ".$this->strConst($this->original_mode).")";
+        echo "\n  ";
+        token_dump($token);
+        $this->printStack();
+        $this->printActiveFormattingElements();
+        if ($this->foster_parent) echo "  -> this is a foster parent mode\n";
+        */
+
+        if ($this->ignore_lf_token) $this->ignore_lf_token--;
+        $this->ignored = false;
+        // indenting is a little wonky, this can be changed later on
+        switch ($mode) {
+
+    case self::INITIAL:
+
+        /* A character token that is one of U+0009 CHARACTER TABULATION,
+         * U+000A LINE FEED (LF), U+000C FORM FEED (FF),  or U+0020 SPACE */
+        if ($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Ignore the token. */
+            $this->ignored = true;
+        } elseif ($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            if (
+                $token['name'] !== 'html' || !empty($token['public']) ||
+                !empty($token['system']) || $token !== 'about:legacy-compat'
+            ) {
+                /* If the DOCTYPE token's name is not a case-sensitive match
+                 * for the string "html", or if the token's public identifier
+                 * is not missing, or if the token's system identifier is
+                 * neither missing nor a case-sensitive match for the string
+                 * "about:legacy-compat", then there is a parse error (this
+                 * is the DOCTYPE parse error). */
+                // DOCTYPE parse error
+            }
+            /* Append a DocumentType node to the Document node, with the name
+             * attribute set to the name given in the DOCTYPE token, or the
+             * empty string if the name was missing; the publicId attribute
+             * set to the public identifier given in the DOCTYPE token, or
+             * the empty string if the public identifier was missing; the
+             * systemId attribute set to the system identifier given in the
+             * DOCTYPE token, or the empty string if the system identifier
+             * was missing; and the other attributes specific to
+             * DocumentType objects set to null and empty lists as
+             * appropriate. Associate the DocumentType node with the
+             * Document object so that it is returned as the value of the
+             * doctype attribute of the Document object. */
+            if (!isset($token['public'])) $token['public'] = null;
+            if (!isset($token['system'])) $token['system'] = null;
+            // Yes this is hacky. I'm kind of annoyed that I can't appendChild
+            // a doctype to DOMDocument. Maybe I haven't chanted the right
+            // syllables.
+            $impl = new DOMImplementation();
+            // This call can fail for particularly pathological cases (namely,
+            // the qualifiedName parameter ($token['name']) could be missing.
+            if ($token['name']) {
+                $doctype = $impl->createDocumentType($token['name'], $token['public'], $token['system']);
+                $this->dom->appendChild($doctype);
+            } else {
+                // It looks like libxml's not actually *able* to express this case.
+                // So... don't.
+                $this->dom->emptyDoctype = true;
+            }
+            $public = is_null($token['public']) ? false : strtolower($token['public']);
+            $system = is_null($token['system']) ? false : strtolower($token['system']);
+            $publicStartsWithForQuirks = array(
+             "+//silmaril//dtd html pro v0r11 19970101//",
+             "-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
+             "-//as//dtd html 3.0 aswedit + extensions//",
+             "-//ietf//dtd html 2.0 level 1//",
+             "-//ietf//dtd html 2.0 level 2//",
+             "-//ietf//dtd html 2.0 strict level 1//",
+             "-//ietf//dtd html 2.0 strict level 2//",
+             "-//ietf//dtd html 2.0 strict//",
+             "-//ietf//dtd html 2.0//",
+             "-//ietf//dtd html 2.1e//",
+             "-//ietf//dtd html 3.0//",
+             "-//ietf//dtd html 3.2 final//",
+             "-//ietf//dtd html 3.2//",
+             "-//ietf//dtd html 3//",
+             "-//ietf//dtd html level 0//",
+             "-//ietf//dtd html level 1//",
+             "-//ietf//dtd html level 2//",
+             "-//ietf//dtd html level 3//",
+             "-//ietf//dtd html strict level 0//",
+             "-//ietf//dtd html strict level 1//",
+             "-//ietf//dtd html strict level 2//",
+             "-//ietf//dtd html strict level 3//",
+             "-//ietf//dtd html strict//",
+             "-//ietf//dtd html//",
+             "-//metrius//dtd metrius presentational//",
+             "-//microsoft//dtd internet explorer 2.0 html strict//",
+             "-//microsoft//dtd internet explorer 2.0 html//",
+             "-//microsoft//dtd internet explorer 2.0 tables//",
+             "-//microsoft//dtd internet explorer 3.0 html strict//",
+             "-//microsoft//dtd internet explorer 3.0 html//",
+             "-//microsoft//dtd internet explorer 3.0 tables//",
+             "-//netscape comm. corp.//dtd html//",
+             "-//netscape comm. corp.//dtd strict html//",
+             "-//o'reilly and associates//dtd html 2.0//",
+             "-//o'reilly and associates//dtd html extended 1.0//",
+             "-//o'reilly and associates//dtd html extended relaxed 1.0//",
+             "-//spyglass//dtd html 2.0 extended//",
+             "-//sq//dtd html 2.0 hotmetal + extensions//",
+             "-//sun microsystems corp.//dtd hotjava html//",
+             "-//sun microsystems corp.//dtd hotjava strict html//",
+             "-//w3c//dtd html 3 1995-03-24//",
+             "-//w3c//dtd html 3.2 draft//",
+             "-//w3c//dtd html 3.2 final//",
+             "-//w3c//dtd html 3.2//",
+             "-//w3c//dtd html 3.2s draft//",
+             "-//w3c//dtd html 4.0 frameset//",
+             "-//w3c//dtd html 4.0 transitional//",
+             "-//w3c//dtd html experimental 19960712//",
+             "-//w3c//dtd html experimental 970421//",
+             "-//w3c//dtd w3 html//",
+             "-//w3o//dtd w3 html 3.0//",
+             "-//webtechs//dtd mozilla html 2.0//",
+             "-//webtechs//dtd mozilla html//",
+            );
+            $publicSetToForQuirks = array(
+             "-//w3o//dtd w3 html strict 3.0//",
+             "-/w3c/dtd html 4.0 transitional/en",
+             "html",
+            );
+            $publicStartsWithAndSystemForQuirks = array(
+             "-//w3c//dtd html 4.01 frameset//",
+             "-//w3c//dtd html 4.01 transitional//",
+            );
+            $publicStartsWithForLimitedQuirks = array(
+             "-//w3c//dtd xhtml 1.0 frameset//",
+             "-//w3c//dtd xhtml 1.0 transitional//",
+            );
+            $publicStartsWithAndSystemForLimitedQuirks = array(
+             "-//w3c//dtd html 4.01 frameset//",
+             "-//w3c//dtd html 4.01 transitional//",
+            );
+            // first, do easy checks
+            if (
+                !empty($token['force-quirks']) ||
+                strtolower($token['name']) !== 'html'
+            ) {
+                $this->quirks_mode = self::QUIRKS_MODE;
+            } else {
+                do {
+                    if ($system) {
+                        foreach ($publicStartsWithAndSystemForQuirks as $x) {
+                            if (strncmp($public, $x, strlen($x)) === 0) {
+                                $this->quirks_mode = self::QUIRKS_MODE;
+                                break;
+                            }
+                        }
+                        if (!is_null($this->quirks_mode)) break;
+                        foreach ($publicStartsWithAndSystemForLimitedQuirks as $x) {
+                            if (strncmp($public, $x, strlen($x)) === 0) {
+                                $this->quirks_mode = self::LIMITED_QUIRKS_MODE;
+                                break;
+                            }
+                        }
+                        if (!is_null($this->quirks_mode)) break;
+                    }
+                    foreach ($publicSetToForQuirks as $x) {
+                        if ($public === $x) {
+                            $this->quirks_mode = self::QUIRKS_MODE;
+                            break;
+                        }
+                    }
+                    if (!is_null($this->quirks_mode)) break;
+                    foreach ($publicStartsWithForLimitedQuirks as $x) {
+                        if (strncmp($public, $x, strlen($x)) === 0) {
+                            $this->quirks_mode = self::LIMITED_QUIRKS_MODE;
+                        }
+                    }
+                    if (!is_null($this->quirks_mode)) break;
+                    if ($system === "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd") {
+                        $this->quirks_mode = self::QUIRKS_MODE;
+                        break;
+                    }
+                    foreach ($publicStartsWithForQuirks as $x) {
+                        if (strncmp($public, $x, strlen($x)) === 0) {
+                            $this->quirks_mode = self::QUIRKS_MODE;
+                            break;
+                        }
+                    }
+                    if (is_null($this->quirks_mode)) {
+                        $this->quirks_mode = self::NO_QUIRKS;
+                    }
+                } while (false);
+            }
+            $this->mode = self::BEFORE_HTML;
+        } else {
+            // parse error
+            /* Switch the insertion mode to "before html", then reprocess the
+             * current token. */
+            $this->mode = self::BEFORE_HTML;
+            $this->quirks_mode = self::QUIRKS_MODE;
+            $this->emitToken($token);
+        }
+        break;
+
+    case self::BEFORE_HTML:
+
+        /* A DOCTYPE token */
+        if($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // Parse error. Ignore the token.
+            $this->ignored = true;
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the Document object with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->dom->appendChild($comment);
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        } elseif($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Ignore the token. */
+            $this->ignored = true;
+
+        /* A start tag whose tag name is "html" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] == 'html') {
+            /* Create an element for the token in the HTML namespace. Append it 
+             * to the Document  object. Put this element in the stack of open 
+             * elements. */
+            $html = $this->insertElement($token, false);
+            $this->dom->appendChild($html);
+            $this->stack[] = $html;
+
+            $this->mode = self::BEFORE_HEAD;
+
+        } else {
+            /* Create an html element. Append it to the Document object. Put
+             * this element in the stack of open elements. */
+            $html = $this->dom->createElementNS(self::NS_HTML, 'html');
+            $this->dom->appendChild($html);
+            $this->stack[] = $html;
+
+            /* Switch the insertion mode to "before head", then reprocess the
+             * current token. */
+            $this->mode = self::BEFORE_HEAD;
+            $this->emitToken($token);
+        }
+        break;
+
+    case self::BEFORE_HEAD:
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Ignore the token. */
+            $this->ignored = true;
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data attribute
+            set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        /* A DOCTYPE token */
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            /* Parse error. Ignore the token */
+            $this->ignored = true;
+            // parse error
+
+        /* A start tag token with the tag name "html" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            /* Process the token using the rules for the "in body"
+             * insertion mode. */
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* A start tag token with the tag name "head" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'head') {
+            /* Insert an HTML element for the token. */
+            $element = $this->insertElement($token);
+
+            /* Set the head element pointer to this new element node. */
+            $this->head_pointer = $element;
+
+            /* Change the insertion mode to "in head". */
+            $this->mode = self::IN_HEAD;
+
+        /* An end tag whose tag name is one of: "head", "body", "html", "br" */
+        } elseif(
+            $token['type'] === HTML5_Tokenizer::ENDTAG && (
+                $token['name'] === 'head' || $token['name'] === 'body' ||
+                $token['name'] === 'html' || $token['name'] === 'br'
+        )) {
+            /* Act as if a start tag token with the tag name "head" and no
+             * attributes had been seen, then reprocess the current token. */
+            $this->emitToken(array(
+                'name' => 'head',
+                'type' => HTML5_Tokenizer::STARTTAG,
+                'attr' => array()
+            ));
+            $this->emitToken($token);
+
+        /* Any other end tag */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG) {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+
+        } else {
+            /* Act as if a start tag token with the tag name "head" and no
+             * attributes had been seen, then reprocess the current token.
+             * Note: This will result in an empty head element being
+             * generated, with the current token being reprocessed in the
+             * "after head" insertion mode. */
+            $this->emitToken(array(
+                'name' => 'head',
+                'type' => HTML5_Tokenizer::STARTTAG,
+                'attr' => array()
+            ));
+            $this->emitToken($token);
+        }
+        break;
+
+    case self::IN_HEAD:
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE. */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Insert the character into the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data attribute
+            set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        /* A DOCTYPE token */
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+            // parse error
+
+        /* A start tag whose tag name is "html" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* A start tag whose tag name is one of: "base", "command", "link" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        ($token['name'] === 'base' || $token['name'] === 'command' ||
+        $token['name'] === 'link')) {
+            /* Insert an HTML element for the token. Immediately pop the
+             * current node off the stack of open elements. */
+            $this->insertElement($token);
+            array_pop($this->stack);
+
+            // YYY: Acknowledge the token's self-closing flag, if it is set.
+
+        /* A start tag whose tag name is "meta" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'meta') {
+            /* Insert an HTML element for the token. Immediately pop the
+             * current node off the stack of open elements. */
+            $this->insertElement($token);
+            array_pop($this->stack);
+
+            // XERROR: Acknowledge the token's self-closing flag, if it is set.
+
+            // XENCODING: If the element has a charset attribute, and its value is a
+            // supported encoding, and the confidence is currently tentative,
+            // then change the encoding to the encoding given by the value of
+            // the charset attribute.
+            //
+            // Otherwise, if the element has a content attribute, and applying
+            // the algorithm for extracting an encoding from a Content-Type to
+            // its value returns a supported encoding encoding, and the
+            // confidence is currently tentative, then change the encoding to
+            // the encoding encoding.
+
+        /* A start tag with the tag name "title" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'title') {
+            $this->insertRCDATAElement($token);
+
+        /* A start tag whose tag name is "noscript", if the scripting flag is enabled, or
+         * A start tag whose tag name is one of: "noframes", "style" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        ($token['name'] === 'noscript' || $token['name'] === 'noframes' || $token['name'] === 'style')) {
+            // XSCRIPT: Scripting flag not respected
+            $this->insertCDATAElement($token);
+
+        // XSCRIPT: Scripting flag disable not implemented
+
+        /* A start tag with the tag name "script" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'script') {
+            /* 1. Create an element for the token in the HTML namespace. */
+            $node = $this->insertElement($token, false);
+
+            /* 2. Mark the element as being "parser-inserted" */
+            // Uhhh... XSCRIPT
+
+            /* 3. If the parser was originally created for the HTML
+             * fragment parsing algorithm, then mark the script element as 
+             * "already executed". (fragment case) */
+            // ditto... XSCRIPT
+
+            /* 4. Append the new element to the current node  and push it onto 
+             * the stack of open elements.  */
+            end($this->stack)->appendChild($node);
+            $this->stack[] = $node;
+            // I guess we could squash these together
+
+            /* 6. Let the original insertion mode be the current insertion mode. */
+            $this->original_mode = $this->mode;
+            /* 7. Switch the insertion mode to "in CDATA/RCDATA" */
+            $this->mode = self::IN_CDATA_RCDATA;
+            /* 5. Switch the tokeniser's content model flag to the CDATA state. */
+            $this->content_model = HTML5_Tokenizer::CDATA;
+
+        /* An end tag with the tag name "head" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'head') {
+            /* Pop the current node (which will be the head element) off the stack of open elements. */
+            array_pop($this->stack);
+
+            /* Change the insertion mode to "after head". */
+            $this->mode = self::AFTER_HEAD;
+
+        // Slight logic inversion here to minimize duplication
+        /* A start tag with the tag name "head". */
+        /* An end tag whose tag name is not one of: "body", "html", "br" */
+        } elseif(($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'head') ||
+        ($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] !== 'html' &&
+        $token['name'] !== 'body' && $token['name'] !== 'br')) {
+            // Parse error. Ignore the token.
+            $this->ignored = true;
+
+        /* Anything else */
+        } else {
+            /* Act as if an end tag token with the tag name "head" had been
+             * seen, and reprocess the current token. */
+            $this->emitToken(array(
+                'name' => 'head',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+
+            /* Then, reprocess the current token. */
+            $this->emitToken($token);
+        }
+        break;
+
+    case self::IN_HEAD_NOSCRIPT:
+        if ($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+        } elseif ($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::IN_BODY);
+        } elseif ($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'noscript') {
+            /* Pop the current node (which will be a noscript element) from the
+             * stack of open elements; the new current node will be a head
+             * element. */
+            array_pop($this->stack);
+            $this->mode = self::IN_HEAD;
+        } elseif (
+            ($token['type'] === HTML5_Tokenizer::SPACECHARACTER) ||
+            ($token['type'] === HTML5_Tokenizer::COMMENT) ||
+            ($token['type'] === HTML5_Tokenizer::STARTTAG && (
+                $token['name'] === 'link' || $token['name'] === 'meta' ||
+                $token['name'] === 'noframes' || $token['name'] === 'style'))) {
+            $this->processWithRulesFor($token, self::IN_HEAD);
+        // inverted logic
+        } elseif (
+            ($token['type'] === HTML5_Tokenizer::STARTTAG && (
+                $token['name'] === 'head' || $token['name'] === 'noscript')) ||
+            ($token['type'] === HTML5_Tokenizer::ENDTAG &&
+                $token['name'] !== 'br')) {
+            // parse error
+        } else {
+            // parse error
+            $this->emitToken(array(
+                'type' => HTML5_Tokenizer::ENDTAG,
+                'name' => 'noscript',
+            ));
+            $this->emitToken($token);
+        }
+        break;
+
+    case self::AFTER_HEAD:
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data attribute
+            set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        } elseif ($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        } elseif ($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* A start tag token with the tag name "body" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'body') {
+            $this->insertElement($token);
+
+            /* Set the frameset-ok flag to "not ok". */
+            $this->flag_frameset_ok = false;
+
+            /* Change the insertion mode to "in body". */
+            $this->mode = self::IN_BODY;
+
+        /* A start tag token with the tag name "frameset" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'frameset') {
+            /* Insert a frameset element for the token. */
+            $this->insertElement($token);
+
+            /* Change the insertion mode to "in frameset". */
+            $this->mode = self::IN_FRAMESET;
+
+        /* A start tag token whose tag name is one of: "base", "link", "meta",
+        "script", "style", "title" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && in_array($token['name'],
+        array('base', 'link', 'meta', 'noframes', 'script', 'style', 'title'))) {
+            // parse error
+            /* Push the node pointed to by the head element pointer onto the
+             * stack of open elements. */
+            $this->stack[] = $this->head_pointer;
+            $this->processWithRulesFor($token, self::IN_HEAD);
+            array_splice($this->stack, array_search($this->head_pointer, $this->stack, true), 1);
+
+        // inversion of specification
+        } elseif(
+        ($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'head') ||
+        ($token['type'] === HTML5_Tokenizer::ENDTAG &&
+            $token['name'] !== 'body' && $token['name'] !== 'html' &&
+            $token['name'] !== 'br')) {
+            // parse error
+
+        /* Anything else */
+        } else {
+            $this->emitToken(array(
+                'name' => 'body',
+                'type' => HTML5_Tokenizer::STARTTAG,
+                'attr' => array()
+            ));
+            $this->flag_frameset_ok = true;
+            $this->emitToken($token);
+        }
+        break;
+
+    case self::IN_BODY:
+        /* Handle the token as follows: */
+
+        switch($token['type']) {
+            /* A character token */
+            case HTML5_Tokenizer::CHARACTER:
+            case HTML5_Tokenizer::SPACECHARACTER:
+                /* Reconstruct the active formatting elements, if any. */
+                $this->reconstructActiveFormattingElements();
+
+                /* Append the token's character to the current node. */
+                $this->insertText($token['data']);
+
+                /* If the token is not one of U+0009 CHARACTER TABULATION,
+                 * U+000A LINE FEED (LF), U+000C FORM FEED (FF),  or U+0020
+                 * SPACE, then set the frameset-ok flag to "not ok". */
+                // i.e., if any of the characters is not whitespace
+                if (strlen($token['data']) !== strspn($token['data'], HTML5_Tokenizer::WHITESPACE)) {
+                    $this->flag_frameset_ok = false;
+                }
+            break;
+
+            /* A comment token */
+            case HTML5_Tokenizer::COMMENT:
+                /* Append a Comment node to the current node with the data
+                attribute set to the data given in the comment token. */
+                $this->insertComment($token['data']);
+            break;
+
+            case HTML5_Tokenizer::DOCTYPE:
+                // parse error
+            break;
+
+            case HTML5_Tokenizer::STARTTAG:
+            switch($token['name']) {
+                case 'html':
+                    // parse error
+                    /* For each attribute on the token, check to see if the
+                     * attribute is already present on the top element of the
+                     * stack of open elements. If it is not, add the attribute
+                     * and its corresponding value to that element. */
+                    foreach($token['attr'] as $attr) {
+                        if(!$this->stack[0]->hasAttribute($attr['name'])) {
+                            $this->stack[0]->setAttribute($attr['name'], $attr['value']);
+                        }
+                    }
+                break;
+
+                case 'base': case 'command': case 'link': case 'meta': case 'noframes':
+                case 'script': case 'style': case 'title':
+                    /* Process the token as if the insertion mode had been "in
+                    head". */
+                    $this->processWithRulesFor($token, self::IN_HEAD);
+                break;
+
+                /* A start tag token with the tag name "body" */
+                case 'body':
+                    /* Parse error. If the second element on the stack of open
+                    elements is not a body element, or, if the stack of open
+                    elements has only one node on it, then ignore the token.
+                    (fragment case) */
+                    if(count($this->stack) === 1 || $this->stack[1]->tagName !== 'body') {
+                        $this->ignored = true;
+                        // Ignore
+
+                    /* Otherwise, for each attribute on the token, check to see
+                    if the attribute is already present on the body element (the
+                    second element)    on the stack of open elements. If it is not,
+                    add the attribute and its corresponding value to that
+                    element. */
+                    } else {
+                        foreach($token['attr'] as $attr) {
+                            if(!$this->stack[1]->hasAttribute($attr['name'])) {
+                                $this->stack[1]->setAttribute($attr['name'], $attr['value']);
+                            }
+                        }
+                    }
+                break;
+
+                case 'frameset':
+                    // parse error
+                    /* If the second element on the stack of open elements is
+                     * not a body element, or, if the stack of open elements
+                     * has only one node on it, then ignore the token.
+                     * (fragment case) */
+                    if(count($this->stack) === 1 || $this->stack[1]->tagName !== 'body') {
+                        $this->ignored = true;
+                        // Ignore
+                    } elseif (!$this->flag_frameset_ok) {
+                        $this->ignored = true;
+                        // Ignore
+                    } else {
+                        /* 1. Remove the second element on the stack of open 
+                         * elements from its parent node, if it has one.  */
+                        if($this->stack[1]->parentNode) {
+                            $this->stack[1]->parentNode->removeChild($this->stack[1]);
+                        }
+
+                        /* 2. Pop all the nodes from the bottom of the stack of 
+                         * open elements, from the current node up to the root 
+                         * html element. */
+                        array_splice($this->stack, 1);
+
+                        $this->insertElement($token);
+                        $this->mode = self::IN_FRAMESET;
+                    }
+                break;
+
+                // in spec, there is a diversion here
+
+                case 'address': case 'article': case 'aside': case 'blockquote':
+                case 'center': case 'datagrid': case 'details': case 'dialog': case 'dir':
+                case 'div': case 'dl': case 'fieldset': case 'figure': case 'footer':
+                case 'header': case 'hgroup': case 'menu': case 'nav':
+                case 'ol': case 'p': case 'section': case 'ul':
+                    /* If the stack of open elements has a p element in scope,
+                    then act as if an end tag with the tag name p had been
+                    seen. */
+                    if($this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+                break;
+
+                /* A start tag whose tag name is one of: "h1", "h2", "h3", "h4",
+                "h5", "h6" */
+                case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
+                    /* If the stack of open elements has a p  element in scope,
+                    then act as if an end tag with the tag name p had been seen. */
+                    if($this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* If the current node is an element whose tag name is one
+                     * of "h1", "h2", "h3", "h4", "h5", or "h6", then this is a
+                     * parse error; pop the current node off the stack of open
+                     * elements. */
+                    $peek = array_pop($this->stack);
+                    if (in_array($peek->tagName, array("h1", "h2", "h3", "h4", "h5", "h6"))) {
+                        // parse error
+                    } else {
+                        $this->stack[] = $peek;
+                    }
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+                break;
+
+                case 'pre': case 'listing':
+                    /* If the stack of open elements has a p  element in scope,
+                    then act as if an end tag with the tag name p had been seen. */
+                    if($this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+                    $this->insertElement($token);
+                    /* If the next token is a U+000A LINE FEED (LF) character
+                     * token, then ignore that token and move on to the next
+                     * one. (Newlines at the start of pre blocks are ignored as
+                     * an authoring convenience.) */
+                    $this->ignore_lf_token = 2;
+                    $this->flag_frameset_ok = false;
+                break;
+
+                /* A start tag whose tag name is "form" */
+                case 'form':
+                    /* If the form element pointer is not null, ignore the
+                    token with a parse error. */
+                    if($this->form_pointer !== null) {
+                        $this->ignored = true;
+                        // Ignore.
+
+                    /* Otherwise: */
+                    } else {
+                        /* If the stack of open elements has a p element in
+                        scope, then act as if an end tag with the tag name p
+                        had been seen. */
+                        if($this->elementInScope('p')) {
+                            $this->emitToken(array(
+                                'name' => 'p',
+                                'type' => HTML5_Tokenizer::ENDTAG
+                            ));
+                        }
+
+                        /* Insert an HTML element for the token, and set the
+                        form element pointer to point to the element created. */
+                        $element = $this->insertElement($token);
+                        $this->form_pointer = $element;
+                    }
+                break;
+
+                // condensed specification
+                case 'li': case 'dd': case 'dt':
+                    /* 1. Set the frameset-ok flag to "not ok". */
+                    $this->flag_frameset_ok = false;
+
+                    $stack_length = count($this->stack) - 1;
+                    for($n = $stack_length; 0 <= $n; $n--) {
+                        /* 2. Initialise node to be the current node (the
+                        bottommost node of the stack). */
+                        $stop = false;
+                        $node = $this->stack[$n];
+                        $cat  = $this->getElementCategory($node);
+
+                        // for case 'li':
+                        /* 3. If node is an li element, then act as if an end
+                         * tag with the tag name "li" had been seen, then jump
+                         * to the last step.  */
+                        // for case 'dd': case 'dt':
+                        /* If node is a dd or dt element, then act as if an end
+                         * tag with the same tag name as node had been seen, then
+                         * jump to the last step. */
+                        if(($token['name'] === 'li' && $node->tagName === 'li') ||
+                        ($token['name'] !== 'li' && ($node->tagName === 'dd' || $node->tagName === 'dt'))) { // limited conditional
+                            $this->emitToken(array(
+                                'type' => HTML5_Tokenizer::ENDTAG,
+                                'name' => $node->tagName,
+                            ));
+                            break;
+                        }
+
+                        /* 4. If node is not in the formatting category, and is
+                        not    in the phrasing category, and is not an address,
+                        div or p element, then stop this algorithm. */
+                        if($cat !== self::FORMATTING && $cat !== self::PHRASING &&
+                        $node->tagName !== 'address' && $node->tagName !== 'div' &&
+                        $node->tagName !== 'p') {
+                            break;
+                        }
+
+                        /* 5. Otherwise, set node to the previous entry in the
+                         * stack of open elements and return to step 2. */
+                    }
+
+                    /* 6. This is the last step. */
+
+                    /* If the stack of open elements has a p  element in scope,
+                    then act as if an end tag with the tag name p had been
+                    seen. */
+                    if($this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* Finally, insert an HTML element with the same tag
+                    name as the    token's. */
+                    $this->insertElement($token);
+                break;
+
+                /* A start tag token whose tag name is "plaintext" */
+                case 'plaintext':
+                    /* If the stack of open elements has a p  element in scope,
+                    then act as if an end tag with the tag name p had been
+                    seen. */
+                    if($this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    $this->content_model = HTML5_Tokenizer::PLAINTEXT;
+                break;
+
+                // more diversions
+
+                /* A start tag whose tag name is "a" */
+                case 'a':
+                    /* If the list of active formatting elements contains
+                    an element whose tag name is "a" between the end of the
+                    list and the last marker on the list (or the start of
+                    the list if there is no marker on the list), then this
+                    is a parse error; act as if an end tag with the tag name
+                    "a" had been seen, then remove that element from the list
+                    of active formatting elements and the stack of open
+                    elements if the end tag didn't already remove it (it
+                    might not have if the element is not in table scope). */
+                    $leng = count($this->a_formatting);
+
+                    for($n = $leng - 1; $n >= 0; $n--) {
+                        if($this->a_formatting[$n] === self::MARKER) {
+                            break;
+
+                        } elseif($this->a_formatting[$n]->tagName === 'a') {
+                            $a = $this->a_formatting[$n];
+                            $this->emitToken(array(
+                                'name' => 'a',
+                                'type' => HTML5_Tokenizer::ENDTAG
+                            ));
+                            if (in_array($a, $this->a_formatting)) {
+                                $a_i = array_search($a, $this->a_formatting, true);
+                                if($a_i !== false) array_splice($this->a_formatting, $a_i, 1);
+                            }
+                            if (in_array($a, $this->stack)) {
+                                $a_i = array_search($a, $this->stack, true);
+                                if ($a_i !== false) array_splice($this->stack, $a_i, 1);
+                            }
+                            break;
+                        }
+                    }
+
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* Insert an HTML element for the token. */
+                    $el = $this->insertElement($token);
+
+                    /* Add that element to the list of active formatting
+                    elements. */
+                    $this->a_formatting[] = $el;
+                break;
+
+                case 'b': case 'big': case 'code': case 'em': case 'font': case 'i':
+                case 's': case 'small': case 'strike':
+                case 'strong': case 'tt': case 'u':
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* Insert an HTML element for the token. */
+                    $el = $this->insertElement($token);
+
+                    /* Add that element to the list of active formatting
+                    elements. */
+                    $this->a_formatting[] = $el;
+                break;
+
+                case 'nobr':
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* If the stack of open elements has a nobr element in
+                     * scope, then this is a parse error; act as if an end tag
+                     * with the tag name "nobr" had been seen, then once again
+                     * reconstruct the active formatting elements, if any. */
+                    if ($this->elementInScope('nobr')) {
+                        $this->emitToken(array(
+                            'name' => 'nobr',
+                            'type' => HTML5_Tokenizer::ENDTAG,
+                        ));
+                        $this->reconstructActiveFormattingElements();
+                    }
+
+                    /* Insert an HTML element for the token. */
+                    $el = $this->insertElement($token);
+
+                    /* Add that element to the list of active formatting
+                    elements. */
+                    $this->a_formatting[] = $el;
+                break;
+
+                // another diversion
+
+                /* A start tag token whose tag name is "button" */
+                case 'button':
+                    /* If the stack of open elements has a button element in scope,
+                    then this is a parse error; act as if an end tag with the tag
+                    name "button" had been seen, then reprocess the token. (We don't
+                    do that. Unnecessary.) (I hope you're right! -- ezyang) */
+                    if($this->elementInScope('button')) {
+                        $this->emitToken(array(
+                            'name' => 'button',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    /* Insert a marker at the end of the list of active
+                    formatting elements. */
+                    $this->a_formatting[] = self::MARKER;
+
+                    $this->flag_frameset_ok = false;
+                break;
+
+                case 'applet': case 'marquee': case 'object':
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    /* Insert a marker at the end of the list of active
+                    formatting elements. */
+                    $this->a_formatting[] = self::MARKER;
+
+                    $this->flag_frameset_ok = false;
+                break;
+
+                // spec diversion
+
+                /* A start tag whose tag name is "table" */
+                case 'table':
+                    /* If the stack of open elements has a p element in scope,
+                    then act as if an end tag with the tag name p had been seen. */
+                    if($this->quirks_mode !== self::QUIRKS_MODE &&
+                    $this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    $this->flag_frameset_ok = false;
+
+                    /* Change the insertion mode to "in table". */
+                    $this->mode = self::IN_TABLE;
+                break;
+
+                /* A start tag whose tag name is one of: "area", "basefont",
+                "bgsound", "br", "embed", "img", "param", "spacer", "wbr" */
+                case 'area': case 'basefont': case 'bgsound': case 'br':
+                case 'embed': case 'img': case 'input': case 'keygen': case 'spacer':
+                case 'wbr':
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    /* Immediately pop the current node off the stack of open elements. */
+                    array_pop($this->stack);
+
+                    // YYY: Acknowledge the token's self-closing flag, if it is set.
+
+                    $this->flag_frameset_ok = false;
+                break;
+
+                case 'param': case 'source':
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    /* Immediately pop the current node off the stack of open elements. */
+                    array_pop($this->stack);
+
+                    // YYY: Acknowledge the token's self-closing flag, if it is set.
+                break;
+
+                /* A start tag whose tag name is "hr" */
+                case 'hr':
+                    /* If the stack of open elements has a p element in scope,
+                    then act as if an end tag with the tag name p had been seen. */
+                    if($this->elementInScope('p')) {
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    }
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    /* Immediately pop the current node off the stack of open elements. */
+                    array_pop($this->stack);
+
+                    // YYY: Acknowledge the token's self-closing flag, if it is set.
+
+                    $this->flag_frameset_ok = false;
+                break;
+
+                /* A start tag whose tag name is "image" */
+                case 'image':
+                    /* Parse error. Change the token's tag name to "img" and
+                    reprocess it. (Don't ask.) */
+                    $token['name'] = 'img';
+                    $this->emitToken($token);
+                break;
+
+                /* A start tag whose tag name is "isindex" */
+                case 'isindex':
+                    /* Parse error. */
+
+                    /* If the form element pointer is not null,
+                    then ignore the token. */
+                    if($this->form_pointer === null) {
+                        /* Act as if a start tag token with the tag name "form" had
+                        been seen. */
+                        /* If the token has an attribute called "action", set
+                         * the action attribute on the resulting form
+                         * element to the value of the "action" attribute of
+                         * the token. */
+                        $attr = array();
+                        $action = $this->getAttr($token, 'action');
+                        if ($action !== false) {
+                            $attr[] = array('name' => 'action', 'value' => $action);
+                        }
+                        $this->emitToken(array(
+                            'name' => 'form',
+                            'type' => HTML5_Tokenizer::STARTTAG,
+                            'attr' => $attr
+                        ));
+
+                        /* Act as if a start tag token with the tag name "hr" had
+                        been seen. */
+                        $this->emitToken(array(
+                            'name' => 'hr',
+                            'type' => HTML5_Tokenizer::STARTTAG,
+                            'attr' => array()
+                        ));
+
+                        /* Act as if a start tag token with the tag name "p" had
+                        been seen. */
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::STARTTAG,
+                            'attr' => array()
+                        ));
+
+                        /* Act as if a start tag token with the tag name "label"
+                        had been seen. */
+                        $this->emitToken(array(
+                            'name' => 'label',
+                            'type' => HTML5_Tokenizer::STARTTAG,
+                            'attr' => array()
+                        ));
+
+                        /* Act as if a stream of character tokens had been seen. */
+                        $prompt = $this->getAttr($token, 'prompt');
+                        if ($prompt === false) {
+                            $prompt = 'This is a searchable index. '.
+                            'Insert your search keywords here: ';
+                        }
+                        $this->emitToken(array(
+                            'data' => $prompt,
+                            'type' => HTML5_Tokenizer::CHARACTER,
+                        ));
+
+                        /* Act as if a start tag token with the tag name "input"
+                        had been seen, with all the attributes from the "isindex"
+                        token, except with the "name" attribute set to the value
+                        "isindex" (ignoring any explicit "name" attribute). */
+                        $attr = array();
+                        foreach ($token['attr'] as $keypair) {
+                            if ($keypair['name'] === 'name' || $keypair['name'] === 'action' ||
+                                $keypair['name'] === 'prompt') continue;
+                            $attr[] = $keypair;
+                        }
+                        $attr[] = array('name' => 'name', 'value' => 'isindex');
+
+                        $this->emitToken(array(
+                            'name' => 'input',
+                            'type' => HTML5_Tokenizer::STARTTAG,
+                            'attr' => $attr
+                        ));
+
+                        /* Act as if an end tag token with the tag name "label"
+                        had been seen. */
+                        $this->emitToken(array(
+                            'name' => 'label',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+
+                        /* Act as if an end tag token with the tag name "p" had
+                        been seen. */
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+
+                        /* Act as if a start tag token with the tag name "hr" had
+                        been seen. */
+                        $this->emitToken(array(
+                            'name' => 'hr',
+                            'type' => HTML5_Tokenizer::STARTTAG
+                        ));
+
+                        /* Act as if an end tag token with the tag name "form" had
+                        been seen. */
+                        $this->emitToken(array(
+                            'name' => 'form',
+                            'type' => HTML5_Tokenizer::ENDTAG
+                        ));
+                    } else {
+                        $this->ignored = true;
+                    }
+                break;
+
+                /* A start tag whose tag name is "textarea" */
+                case 'textarea':
+                    $this->insertElement($token);
+
+                    /* If the next token is a U+000A LINE FEED (LF)
+                     * character token, then ignore that token and move on to
+                     * the next one. (Newlines at the start of textarea
+                     * elements are ignored as an authoring convenience.)
+                     * need flag, see also <pre> */
+                    $this->ignore_lf_token = 2;
+
+                    $this->original_mode = $this->mode;
+                    $this->flag_frameset_ok = false;
+                    $this->mode = self::IN_CDATA_RCDATA;
+
+                    /* Switch the tokeniser's content model flag to the
+                    RCDATA state. */
+                    $this->content_model = HTML5_Tokenizer::RCDATA;
+                break;
+
+                /* A start tag token whose tag name is "xmp" */
+                case 'xmp':
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    $this->flag_frameset_ok = false;
+
+                    $this->insertCDATAElement($token);
+                break;
+
+                case 'iframe':
+                    $this->flag_frameset_ok = false;
+                    $this->insertCDATAElement($token);
+                break;
+
+                case 'noembed': case 'noscript':
+                    // XSCRIPT: should check scripting flag
+                    $this->insertCDATAElement($token);
+                break;
+
+                /* A start tag whose tag name is "select" */
+                case 'select':
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    /* Insert an HTML element for the token. */
+                    $this->insertElement($token);
+
+                    $this->flag_frameset_ok = false;
+
+                    /* If the insertion mode is one of in table", "in caption",
+                     * "in column group", "in table body", "in row", or "in
+                     * cell", then switch the insertion mode to "in select in
+                     * table". Otherwise, switch the insertion mode  to "in
+                     * select". */
+                    if (
+                        $this->mode === self::IN_TABLE || $this->mode === self::IN_CAPTION ||
+                        $this->mode === self::IN_COLUMN_GROUP || $this->mode ==+self::IN_TABLE_BODY ||
+                        $this->mode === self::IN_ROW || $this->mode === self::IN_CELL
+                    ) {
+                        $this->mode = self::IN_SELECT_IN_TABLE;
+                    } else {
+                        $this->mode = self::IN_SELECT;
+                    }
+                break;
+
+                case 'option': case 'optgroup':
+                    if ($this->elementInScope('option')) {
+                        $this->emitToken(array(
+                            'name' => 'option',
+                            'type' => HTML5_Tokenizer::ENDTAG,
+                        ));
+                    }
+                    $this->reconstructActiveFormattingElements();
+                    $this->insertElement($token);
+                break;
+
+                case 'rp': case 'rt':
+                    /* If the stack of open elements has a ruby element in scope, then generate
+                     * implied end tags. If the current node is not then a ruby element, this is
+                     * a parse error; pop all the nodes from the current node up to the node
+                     * immediately before the bottommost ruby element on the stack of open elements.
+                     */
+                    if ($this->elementInScope('ruby')) {
+                        $this->generateImpliedEndTags();
+                    }
+                    $peek = false;
+                    do {
+                        if ($peek) {
+                            // parse error
+                        }
+                        $peek = array_pop($this->stack);
+                    } while ($peek->tagName !== 'ruby');
+                    $this->stack[] = $peek; // we popped one too many
+                    $this->insertElement($token);
+                break;
+
+                // spec diversion
+
+                case 'math':
+                    $this->reconstructActiveFormattingElements();
+                    $token = $this->adjustMathMLAttributes($token);
+                    $token = $this->adjustForeignAttributes($token);
+                    $this->insertForeignElement($token, self::NS_MATHML);
+                    if (isset($token['self-closing'])) {
+                        // XERROR: acknowledge the token's self-closing flag
+                        array_pop($this->stack);
+                    }
+                    if ($this->mode !== self::IN_FOREIGN_CONTENT) {
+                        $this->secondary_mode = $this->mode;
+                        $this->mode = self::IN_FOREIGN_CONTENT;
+                    }
+                break;
+
+                case 'svg':
+                    $this->reconstructActiveFormattingElements();
+                    $token = $this->adjustSVGAttributes($token);
+                    $token = $this->adjustForeignAttributes($token);
+                    $this->insertForeignElement($token, self::NS_SVG);
+                    if (isset($token['self-closing'])) {
+                        // XERROR: acknowledge the token's self-closing flag
+                        array_pop($this->stack);
+                    }
+                    if ($this->mode !== self::IN_FOREIGN_CONTENT) {
+                        $this->secondary_mode = $this->mode;
+                        $this->mode = self::IN_FOREIGN_CONTENT;
+                    }
+                break;
+
+                case 'caption': case 'col': case 'colgroup': case 'frame': case 'head':
+                case 'tbody': case 'td': case 'tfoot': case 'th': case 'thead': case 'tr':
+                    // parse error
+                break;
+
+                /* A start tag token not covered by the previous entries */
+                default:
+                    /* Reconstruct the active formatting elements, if any. */
+                    $this->reconstructActiveFormattingElements();
+
+                    $this->insertElement($token);
+                    /* This element will be a phrasing  element. */
+                break;
+            }
+            break;
+
+            case HTML5_Tokenizer::ENDTAG:
+            switch($token['name']) {
+                /* An end tag with the tag name "body" */
+                case 'body':
+                    /* If the second element in the stack of open elements is
+                    not a body element, this is a parse error. Ignore the token.
+                    (innerHTML case) */
+                    if(count($this->stack) < 2 || $this->stack[1]->tagName !== 'body') {
+                        $this->ignored = true;
+
+                    /* Otherwise, if there is a node in the stack of open
+                     * elements that is not either a dd element, a dt
+                     * element, an li element, an optgroup element, an
+                     * option element, a p element, an rp element, an rt
+                     * element, a tbody element, a td element, a tfoot
+                     * element, a th element, a thead element, a tr element,
+                     * the body element, or the html element, then this is a
+                     * parse error. */
+                    } else {
+                        // XERROR: implement this check for parse error
+                    }
+
+                    /* Change the insertion mode to "after body". */
+                    $this->mode = self::AFTER_BODY;
+                break;
+
+                /* An end tag with the tag name "html" */
+                case 'html':
+                    /* Act as if an end tag with tag name "body" had been seen,
+                    then, if that token wasn't ignored, reprocess the current
+                    token. */
+                    $this->emitToken(array(
+                        'name' => 'body',
+                        'type' => HTML5_Tokenizer::ENDTAG
+                    ));
+
+                    if (!$this->ignored) $this->emitToken($token);
+                break;
+
+                case 'address': case 'article': case 'aside': case 'blockquote':
+                case 'center': case 'datagrid': case 'details': case 'dir':
+                case 'div': case 'dl': case 'fieldset': case 'figure': case 'footer':
+                case 'header': case 'hgroup': case 'listing': case 'menu':
+                case 'nav': case 'ol': case 'pre': case 'section': case 'ul':
+                    /* If the stack of open elements has an element in scope
+                    with the same tag name as that of the token, then generate
+                    implied end tags. */
+                    if($this->elementInScope($token['name'])) {
+                        $this->generateImpliedEndTags();
+
+                        /* Now, if the current node is not an element with
+                        the same tag name as that of the token, then this
+                        is a parse error. */
+                        // XERROR: implement parse error logic
+
+                        /* If the stack of open elements has an element in
+                        scope with the same tag name as that of the token,
+                        then pop elements from this stack until an element
+                        with that tag name has been popped from the stack. */
+                        do {
+                            $node = array_pop($this->stack);
+                        } while ($node->tagName !== $token['name']);
+                    } else {
+                        // parse error
+                    }
+                break;
+
+                /* An end tag whose tag name is "form" */
+                case 'form':
+                    /* Let node be the element that the form element pointer is set to. */
+                    $node = $this->form_pointer;
+                    /* Set the form element pointer  to null. */
+                    $this->form_pointer = null;
+                    /* If node is null or the stack of open elements does not 
+                        * have node in scope, then this is a parse error; ignore the token. */
+                    if ($node === null || !in_array($node, $this->stack)) {
+                        // parse error
+                        $this->ignored = true;
+                    } else {
+                        /* 1. Generate implied end tags. */
+                        $this->generateImpliedEndTags();
+                        /* 2. If the current node is not node, then this is a parse error.  */
+                        if (end($this->stack) !== $node) {
+                            // parse error
+                        }
+                        /* 3. Remove node from the stack of open elements. */
+                        array_splice($this->stack, array_search($node, $this->stack, true), 1);
+                    }
+
+                break;
+
+                /* An end tag whose tag name is "p" */
+                case 'p':
+                    /* If the stack of open elements has a p element in scope,
+                    then generate implied end tags, except for p elements. */
+                    if($this->elementInScope('p')) {
+                        /* Generate implied end tags, except for elements with
+                         * the same tag name as the token. */
+                        $this->generateImpliedEndTags(array('p'));
+
+                        /* If the current node is not a p element, then this is
+                        a parse error. */
+                        // XERROR: implement
+
+                        /* Pop elements from the stack of open elements  until
+                         * an element with the same tag name as the token has
+                         * been popped from the stack. */
+                        do {
+                            $node = array_pop($this->stack);
+                        } while ($node->tagName !== 'p');
+
+                    } else {
+                        // parse error
+                        $this->emitToken(array(
+                            'name' => 'p',
+                            'type' => HTML5_Tokenizer::STARTTAG,
+                        ));
+                        $this->emitToken($token);
+                    }
+                break;
+
+                /* An end tag whose tag name is "dd", "dt", or "li" */
+                case 'dd': case 'dt': case 'li':
+                    if($this->elementInScope($token['name'])) {
+                        $this->generateImpliedEndTags(array($token['name']));
+
+                        /* If the current node is not an element with the same
+                        tag name as the token, then this is a parse error. */
+                        // XERROR: implement parse error
+
+                        /* Pop elements from the stack of open elements  until
+                         * an element with the same tag name as the token has
+                         * been popped from the stack. */
+                        do {
+                            $node = array_pop($this->stack);
+                        } while ($node->tagName !== $token['name']);
+
+                    } else {
+                        // parse error
+                    }
+                break;
+
+                /* An end tag whose tag name is one of: "h1", "h2", "h3", "h4",
+                "h5", "h6" */
+                case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
+                    $elements = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6');
+
+                    /* If the stack of open elements has in scope an element whose
+                    tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
+                    generate implied end tags. */
+                    if($this->elementInScope($elements)) {
+                        $this->generateImpliedEndTags();
+
+                        /* Now, if the current node is not an element with the same
+                        tag name as that of the token, then this is a parse error. */
+                        // XERROR: implement parse error
+
+                        /* If the stack of open elements has in scope an element
+                        whose tag name is one of "h1", "h2", "h3", "h4", "h5", or
+                        "h6", then pop elements from the stack until an element
+                        with one of those tag names has been popped from the stack. */
+                        do {
+                            $node = array_pop($this->stack);
+                        } while (!in_array($node->tagName, $elements));
+                    } else {
+                        // parse error
+                    }
+                break;
+
+                /* An end tag whose tag name is one of: "a", "b", "big", "em",
+                "font", "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
+                case 'a': case 'b': case 'big': case 'code': case 'em': case 'font':
+                case 'i': case 'nobr': case 's': case 'small': case 'strike':
+                case 'strong': case 'tt': case 'u':
+                    // XERROR: generally speaking this needs parse error logic
+                    /* 1. Let the formatting element be the last element in
+                    the list of active formatting elements that:
+                        * is between the end of the list and the last scope
+                        marker in the list, if any, or the start of the list
+                        otherwise, and
+                        * has the same tag name as the token.
+                    */
+                    while(true) {
+                        for($a = count($this->a_formatting) - 1; $a >= 0; $a--) {
+                            if($this->a_formatting[$a] === self::MARKER) {
+                                break;
+
+                            } elseif($this->a_formatting[$a]->tagName === $token['name']) {
+                                $formatting_element = $this->a_formatting[$a];
+                                $in_stack = in_array($formatting_element, $this->stack, true);
+                                $fe_af_pos = $a;
+                                break;
+                            }
+                        }
+
+                        /* If there is no such node, or, if that node is
+                        also in the stack of open elements but the element
+                        is not in scope, then this is a parse error. Abort
+                        these steps. The token is ignored. */
+                        if(!isset($formatting_element) || ($in_stack &&
+                        !$this->elementInScope($token['name']))) {
+                            $this->ignored = true;
+                            break;
+
+                        /* Otherwise, if there is such a node, but that node
+                        is not in the stack of open elements, then this is a
+                        parse error; remove the element from the list, and
+                        abort these steps. */
+                        } elseif(isset($formatting_element) && !$in_stack) {
+                            unset($this->a_formatting[$fe_af_pos]);
+                            $this->a_formatting = array_merge($this->a_formatting);
+                            break;
+                        }
+
+                        /* Otherwise, there is a formatting element and that
+                         * element is in the stack and is in scope. If the
+                         * element is not the current node, this is a parse
+                         * error. In any case, proceed with the algorithm as
+                         * written in the following steps. */
+                        // XERROR: implement me
+
+                        /* 2. Let the furthest block be the topmost node in the
+                        stack of open elements that is lower in the stack
+                        than the formatting element, and is not an element in
+                        the phrasing or formatting categories. There might
+                        not be one. */
+                        $fe_s_pos = array_search($formatting_element, $this->stack, true);
+                        $length = count($this->stack);
+
+                        for($s = $fe_s_pos + 1; $s < $length; $s++) {
+                            $category = $this->getElementCategory($this->stack[$s]);
+
+                            if($category !== self::PHRASING && $category !== self::FORMATTING) {
+                                $furthest_block = $this->stack[$s];
+                                break;
+                            }
+                        }
+
+                        /* 3. If there is no furthest block, then the UA must
+                        skip the subsequent steps and instead just pop all
+                        the nodes from the bottom of the stack of open
+                        elements, from the current node up to the formatting
+                        element, and remove the formatting element from the
+                        list of active formatting elements. */
+                        if(!isset($furthest_block)) {
+                            for($n = $length - 1; $n >= $fe_s_pos; $n--) {
+                                array_pop($this->stack);
+                            }
+
+                            unset($this->a_formatting[$fe_af_pos]);
+                            $this->a_formatting = array_merge($this->a_formatting);
+                            break;
+                        }
+
+                        /* 4. Let the common ancestor be the element
+                        immediately above the formatting element in the stack
+                        of open elements. */
+                        $common_ancestor = $this->stack[$fe_s_pos - 1];
+
+                        /* 5. Let a bookmark note the position of the
+                        formatting element in the list of active formatting
+                        elements relative to the elements on either side
+                        of it in the list. */
+                        $bookmark = $fe_af_pos;
+
+                        /* 6. Let node and last node  be the furthest block.
+                        Follow these steps: */
+                        $node = $furthest_block;
+                        $last_node = $furthest_block;
+
+                        while(true) {
+                            for($n = array_search($node, $this->stack, true) - 1; $n >= 0; $n--) {
+                                /* 6.1 Let node be the element immediately
+                                prior to node in the stack of open elements. */
+                                $node = $this->stack[$n];
+
+                                /* 6.2 If node is not in the list of active
+                                formatting elements, then remove node from
+                                the stack of open elements and then go back
+                                to step 1. */
+                                if(!in_array($node, $this->a_formatting, true)) {
+                                    array_splice($this->stack, $n, 1);
+
+                                } else {
+                                    break;
+                                }
+                            }
+
+                            /* 6.3 Otherwise, if node is the formatting
+                            element, then go to the next step in the overall
+                            algorithm. */
+                            if($node === $formatting_element) {
+                                break;
+
+                            /* 6.4 Otherwise, if last node is the furthest
+                            block, then move the aforementioned bookmark to
+                            be immediately after the node in the list of
+                            active formatting elements. */
+                            } elseif($last_node === $furthest_block) {
+                                $bookmark = array_search($node, $this->a_formatting, true) + 1;
+                            }
+
+                            /* 6.5 Create an element for the token for which
+                             * the element node was created, replace the entry
+                             * for node in the list of active formatting
+                             * elements with an entry for the new element,
+                             * replace the entry for node in the stack of open
+                             * elements with an entry for the new element, and
+                             * let node be the new element. */
+                            // we don't know what the token is anymore
+                            $clone = $node->cloneNode();
+                            $a_pos = array_search($node, $this->a_formatting, true);
+                            $s_pos = array_search($node, $this->stack, true);
+                            $this->a_formatting[$a_pos] = $clone;
+                            $this->stack[$s_pos] = $clone;
+                            $node = $clone;
+
+                            /* 6.6 Insert last node into node, first removing
+                            it from its previous parent node if any. */
+                            if($last_node->parentNode !== null) {
+                                $last_node->parentNode->removeChild($last_node);
+                            }
+
+                            $node->appendChild($last_node);
+
+                            /* 6.7 Let last node be node. */
+                            $last_node = $node;
+
+                            /* 6.8 Return to step 1 of this inner set of steps. */
+                        }
+
+                        /* 7. If the common ancestor node is a table, tbody,
+                         * tfoot, thead, or tr element, then, foster parent
+                         * whatever last node ended up being in the previous
+                         * step, first removing it from its previous parent
+                         * node if any. */
+                        if ($last_node->parentNode) { // common step
+                            $last_node->parentNode->removeChild($last_node);
+                        }
+                        if (in_array($common_ancestor->tagName, array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
+                            $this->fosterParent($last_node);
+                        /* Otherwise, append whatever last node  ended up being
+                         * in the previous step to the common ancestor node,
+                         * first removing it from its previous parent node if
+                         * any. */
+                        } else {
+                            $common_ancestor->appendChild($last_node);
+                        }
+
+                        /* 8. Create an element for the token for which the
+                         * formatting element was created. */
+                        $clone = $formatting_element->cloneNode();
+
+                        /* 9. Take all of the child nodes of the furthest
+                        block and append them to the element created in the
+                        last step. */
+                        while($furthest_block->hasChildNodes()) {
+                            $child = $furthest_block->firstChild;
+                            $furthest_block->removeChild($child);
+                            $clone->appendChild($child);
+                        }
+
+                        /* 10. Append that clone to the furthest block. */
+                        $furthest_block->appendChild($clone);
+
+                        /* 11. Remove the formatting element from the list
+                        of active formatting elements, and insert the new element
+                        into the list of active formatting elements at the
+                        position of the aforementioned bookmark. */
+                        $fe_af_pos = array_search($formatting_element, $this->a_formatting, true);
+                        array_splice($this->a_formatting, $fe_af_pos, 1);
+
+                        $af_part1 = array_slice($this->a_formatting, 0, $bookmark - 1);
+                        $af_part2 = array_slice($this->a_formatting, $bookmark);
+                        $this->a_formatting = array_merge($af_part1, array($clone), $af_part2);
+
+                        /* 12. Remove the formatting element from the stack
+                        of open elements, and insert the new element into the stack
+                        of open elements immediately below the position of the
+                        furthest block in that stack. */
+                        $fe_s_pos = array_search($formatting_element, $this->stack, true);
+                        array_splice($this->stack, $fe_s_pos, 1);
+
+                        $fb_s_pos = array_search($furthest_block, $this->stack, true);
+                        $s_part1 = array_slice($this->stack, 0, $fb_s_pos + 1);
+                        $s_part2 = array_slice($this->stack, $fb_s_pos + 1);
+                        $this->stack = array_merge($s_part1, array($clone), $s_part2);
+
+                        /* 13. Jump back to step 1 in this series of steps. */
+                        unset($formatting_element, $fe_af_pos, $fe_s_pos, $furthest_block);
+                    }
+                break;
+
+                case 'applet': case 'button': case 'marquee': case 'object':
+                    /* If the stack of open elements has an element in scope whose
+                    tag name matches the tag name of the token, then generate implied
+                    tags. */
+                    if($this->elementInScope($token['name'])) {
+                        $this->generateImpliedEndTags();
+
+                        /* Now, if the current node is not an element with the same
+                        tag name as the token, then this is a parse error. */
+                        // XERROR: implement logic
+
+                        /* Pop elements from the stack of open elements  until
+                         * an element with the same tag name as the token has
+                         * been popped from the stack. */
+                        do {
+                            $node = array_pop($this->stack);
+                        } while ($node->tagName !== $token['name']);
+
+                        /* Clear the list of active formatting elements up to the
+                         * last marker. */
+                        $keys = array_keys($this->a_formatting, self::MARKER, true);
+                        $marker = end($keys);
+
+                        for($n = count($this->a_formatting) - 1; $n > $marker; $n--) {
+                            array_pop($this->a_formatting);
+                        }
+                    } else {
+                        // parse error
+                    }
+                break;
+
+                case 'br':
+                    // Parse error
+                    $this->emitToken(array(
+                        'name' => 'br',
+                        'type' => HTML5_Tokenizer::STARTTAG,
+                    ));
+                break;
+
+                /* An end tag token not covered by the previous entries */
+                default:
+                    for($n = count($this->stack) - 1; $n >= 0; $n--) {
+                        /* Initialise node to be the current node (the bottommost
+                        node of the stack). */
+                        $node = $this->stack[$n];
+
+                        /* If node has the same tag name as the end tag token,
+                        then: */
+                        if($token['name'] === $node->tagName) {
+                            /* Generate implied end tags. */
+                            $this->generateImpliedEndTags();
+
+                            /* If the tag name of the end tag token does not
+                            match the tag name of the current node, this is a
+                            parse error. */
+                            // XERROR: implement this
+
+                            /* Pop all the nodes from the current node up to
+                            node, including node, then stop these steps. */
+                            // XSKETCHY
+                            do {
+                                $pop = array_pop($this->stack);
+                            } while ($pop !== $node);
+                            break;
+
+                        } else {
+                            $category = $this->getElementCategory($node);
+
+                            if($category !== self::FORMATTING && $category !== self::PHRASING) {
+                                /* Otherwise, if node is in neither the formatting
+                                category nor the phrasing category, then this is a
+                                parse error. Stop this algorithm. The end tag token
+                                is ignored. */
+                                $this->ignored = true;
+                                break;
+                                // parse error
+                            }
+                        }
+                        /* Set node to the previous entry in the stack of open elements. Loop. */
+                    }
+                break;
+            }
+            break;
+        }
+        break;
+
+    case self::IN_CDATA_RCDATA:
+        if (
+            $token['type'] === HTML5_Tokenizer::CHARACTER ||
+            $token['type'] === HTML5_Tokenizer::SPACECHARACTER
+        ) {
+            $this->insertText($token['data']);
+        } elseif ($token['type'] === HTML5_Tokenizer::EOF) {
+            // parse error
+            /* If the current node is a script  element, mark the script
+             * element as "already executed". */
+            // probably not necessary
+            array_pop($this->stack);
+            $this->mode = $this->original_mode;
+            $this->emitToken($token);
+        } elseif ($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'script') {
+            array_pop($this->stack);
+            $this->mode = $this->original_mode;
+            // we're ignoring all of the execution stuff
+        } elseif ($token['type'] === HTML5_Tokenizer::ENDTAG) {
+            array_pop($this->stack);
+            $this->mode = $this->original_mode;
+        }
+    break;
+
+    case self::IN_TABLE:
+        $clear = array('html', 'table');
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER &&
+        /* If the current table is tainted, then act as described in
+         * the "anything else" entry below. */
+        // Note: hsivonen has a test that fails due to this line
+        // because he wants to convince Hixie not to do taint
+        !$this->currentTableIsTainted()) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        /* A start tag whose tag name is "caption" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'caption') {
+            /* Clear the stack back to a table context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert a marker at the end of the list of active
+            formatting elements. */
+            $this->a_formatting[] = self::MARKER;
+
+            /* Insert an HTML element for the token, then switch the
+            insertion mode to "in caption". */
+            $this->insertElement($token);
+            $this->mode = self::IN_CAPTION;
+
+        /* A start tag whose tag name is "colgroup" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'colgroup') {
+            /* Clear the stack back to a table context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert an HTML element for the token, then switch the
+            insertion mode to "in column group". */
+            $this->insertElement($token);
+            $this->mode = self::IN_COLUMN_GROUP;
+
+        /* A start tag whose tag name is "col" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'col') {
+            $this->emitToken(array(
+                'name' => 'colgroup',
+                'type' => HTML5_Tokenizer::STARTTAG,
+                'attr' => array()
+            ));
+
+            $this->emitToken($token);
+
+        /* A start tag whose tag name is one of: "tbody", "tfoot", "thead" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && in_array($token['name'],
+        array('tbody', 'tfoot', 'thead'))) {
+            /* Clear the stack back to a table context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert an HTML element for the token, then switch the insertion
+            mode to "in table body". */
+            $this->insertElement($token);
+            $this->mode = self::IN_TABLE_BODY;
+
+        /* A start tag whose tag name is one of: "td", "th", "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        in_array($token['name'], array('td', 'th', 'tr'))) {
+            /* Act as if a start tag token with the tag name "tbody" had been
+            seen, then reprocess the current token. */
+            $this->emitToken(array(
+                'name' => 'tbody',
+                'type' => HTML5_Tokenizer::STARTTAG,
+                'attr' => array()
+            ));
+
+            $this->emitToken($token);
+
+        /* A start tag whose tag name is "table" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'table') {
+            /* Parse error. Act as if an end tag token with the tag name "table"
+            had been seen, then, if that token wasn't ignored, reprocess the
+            current token. */
+            $this->emitToken(array(
+                'name' => 'table',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+
+            if (!$this->ignored) $this->emitToken($token);
+
+        /* An end tag whose tag name is "table" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'table') {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (fragment case) */
+            if(!$this->elementInScope($token['name'], true)) {
+                $this->ignored = true;
+
+            /* Otherwise: */
+            } else {
+                do {
+                    $node = array_pop($this->stack);
+                } while ($node->tagName !== 'table');
+
+                /* Reset the insertion mode appropriately. */
+                $this->resetInsertionMode();
+            }
+
+        /* An end tag whose tag name is one of: "body", "caption", "col",
+        "colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && in_array($token['name'],
+        array('body', 'caption', 'col', 'colgroup', 'html', 'tbody', 'td',
+        'tfoot', 'th', 'thead', 'tr'))) {
+            // Parse error. Ignore the token.
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        ($token['name'] === 'style' || $token['name'] === 'script')) {
+            $this->processWithRulesFor($token, self::IN_HEAD);
+
+        } elseif ($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'input' &&
+        // assignment is intentional
+        /* If the token does not have an attribute with the name "type", or
+         * if it does, but that attribute's value is not an ASCII
+         * case-insensitive match for the string "hidden", then: act as
+         * described in the "anything else" entry below. */
+        ($type = $this->getAttr($token, 'type')) && strtolower($type) === 'hidden') {
+            // I.e., if its an input with the type attribute == 'hidden'
+            /* Otherwise */
+            // parse error
+            $this->insertElement($token);
+            array_pop($this->stack);
+        } elseif ($token['type'] === HTML5_Tokenizer::EOF) {
+            /* If the current node is not the root html element, then this is a parse error. */
+            if (end($this->stack)->tagName !== 'html') {
+                // Note: It can only be the current node in the fragment case.
+                // parse error
+            }
+            /* Stop parsing. */
+        /* Anything else */
+        } else {
+            /* Parse error. Process the token as if the insertion mode was "in
+            body", with the following exception: */
+
+            $old = $this->foster_parent;
+            $this->foster_parent = true;
+            $this->processWithRulesFor($token, self::IN_BODY);
+            $this->foster_parent = $old;
+        }
+    break;
+
+    case self::IN_CAPTION:
+        /* An end tag whose tag name is "caption" */
+        if($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'caption') {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (fragment case) */
+            if(!$this->elementInScope($token['name'], true)) {
+                $this->ignored = true;
+                // Ignore
+
+            /* Otherwise: */
+            } else {
+                /* Generate implied end tags. */
+                $this->generateImpliedEndTags();
+
+                /* Now, if the current node is not a caption element, then this
+                is a parse error. */
+                // XERROR: implement
+
+                /* Pop elements from this stack until a caption element has
+                been popped from the stack. */
+                do {
+                    $node = array_pop($this->stack);
+                } while ($node->tagName !== 'caption');
+
+                /* Clear the list of active formatting elements up to the last
+                marker. */
+                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
+
+                /* Switch the insertion mode to "in table". */
+                $this->mode = self::IN_TABLE;
+            }
+
+        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+        "tbody", "td", "tfoot", "th", "thead", "tr", or an end tag whose tag
+        name is "table" */
+        } elseif(($token['type'] === HTML5_Tokenizer::STARTTAG && in_array($token['name'],
+        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
+        'thead', 'tr'))) || ($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'table')) {
+            /* Parse error. Act as if an end tag with the tag name "caption"
+            had been seen, then, if that token wasn't ignored, reprocess the
+            current token. */
+            $this->emitToken(array(
+                'name' => 'caption',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+
+            if (!$this->ignored) $this->emitToken($token);
+
+        /* An end tag whose tag name is one of: "body", "col", "colgroup",
+        "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && in_array($token['name'],
+        array('body', 'col', 'colgroup', 'html', 'tbody', 'tfoot', 'th',
+        'thead', 'tr'))) {
+            // Parse error. Ignore the token.
+            $this->ignored = true;
+
+        /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in body". */
+            $this->processWithRulesFor($token, self::IN_BODY);
+        }
+    break;
+
+    case self::IN_COLUMN_GROUP:
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertToken($token['data']);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* A start tag whose tag name is "col" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'col') {
+            /* Insert a col element for the token. Immediately pop the current
+            node off the stack of open elements. */
+            $this->insertElement($token);
+            array_pop($this->stack);
+            // XERROR: Acknowledge the token's self-closing flag, if it is set.
+
+        /* An end tag whose tag name is "colgroup" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'colgroup') {
+            /* If the current node is the root html element, then this is a
+            parse error, ignore the token. (fragment case) */
+            if(end($this->stack)->tagName === 'html') {
+                $this->ignored = true;
+
+            /* Otherwise, pop the current node (which will be a colgroup
+            element) from the stack of open elements. Switch the insertion
+            mode to "in table". */
+            } else {
+                array_pop($this->stack);
+                $this->mode = self::IN_TABLE;
+            }
+
+        /* An end tag whose tag name is "col" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'col') {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+
+        /* An end-of-file token */
+        /* If the current node is the root html  element */
+        } elseif($token['type'] === HTML5_Tokenizer::EOF && end($this->stack)->tagName === 'html') {
+            /* Stop parsing */
+
+        /* Anything else */
+        } else {
+            /* Act as if an end tag with the tag name "colgroup" had been seen,
+            and then, if that token wasn't ignored, reprocess the current token. */
+            $this->emitToken(array(
+                'name' => 'colgroup',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+
+            if (!$this->ignored) $this->emitToken($token);
+        }
+    break;
+
+    case self::IN_TABLE_BODY:
+        $clear = array('tbody', 'tfoot', 'thead', 'html');
+
+        /* A start tag whose tag name is "tr" */
+        if($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'tr') {
+            /* Clear the stack back to a table body context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert a tr element for the token, then switch the insertion
+            mode to "in row". */
+            $this->insertElement($token);
+            $this->mode = self::IN_ROW;
+
+        /* A start tag whose tag name is one of: "th", "td" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        ($token['name'] === 'th' ||    $token['name'] === 'td')) {
+            /* Parse error. Act as if a start tag with the tag name "tr" had
+            been seen, then reprocess the current token. */
+            $this->emitToken(array(
+                'name' => 'tr',
+                'type' => HTML5_Tokenizer::STARTTAG,
+                'attr' => array()
+            ));
+
+            $this->emitToken($token);
+
+        /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. */
+            if(!$this->elementInScope($token['name'], true)) {
+                // Parse error
+                $this->ignored = true;
+
+            /* Otherwise: */
+            } else {
+                /* Clear the stack back to a table body context. */
+                $this->clearStackToTableContext($clear);
+
+                /* Pop the current node from the stack of open elements. Switch
+                the insertion mode to "in table". */
+                array_pop($this->stack);
+                $this->mode = self::IN_TABLE;
+            }
+
+        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+        "tbody", "tfoot", "thead", or an end tag whose tag name is "table" */
+        } elseif(($token['type'] === HTML5_Tokenizer::STARTTAG && in_array($token['name'],
+        array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead'))) ||
+        ($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'table')) {
+            /* If the stack of open elements does not have a tbody, thead, or
+            tfoot element in table scope, this is a parse error. Ignore the
+            token. (fragment case) */
+            if(!$this->elementInScope(array('tbody', 'thead', 'tfoot'), true)) {
+                // parse error
+                $this->ignored = true;
+
+            /* Otherwise: */
+            } else {
+                /* Clear the stack back to a table body context. */
+                $this->clearStackToTableContext($clear);
+
+                /* Act as if an end tag with the same tag name as the current
+                node ("tbody", "tfoot", or "thead") had been seen, then
+                reprocess the current token. */
+                $this->emitToken(array(
+                    'name' => end($this->stack)->tagName,
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+
+                $this->emitToken($token);
+            }
+
+        /* An end tag whose tag name is one of: "body", "caption", "col",
+        "colgroup", "html", "td", "th", "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && in_array($token['name'],
+        array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+
+        /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in table". */
+            $this->processWithRulesFor($token, self::IN_TABLE);
+        }
+    break;
+
+    case self::IN_ROW:
+        $clear = array('tr', 'html');
+
+        /* A start tag whose tag name is one of: "th", "td" */
+        if($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        ($token['name'] === 'th' || $token['name'] === 'td')) {
+            /* Clear the stack back to a table row context. */
+            $this->clearStackToTableContext($clear);
+
+            /* Insert an HTML element for the token, then switch the insertion
+            mode to "in cell". */
+            $this->insertElement($token);
+            $this->mode = self::IN_CELL;
+
+            /* Insert a marker at the end of the list of active formatting
+            elements. */
+            $this->a_formatting[] = self::MARKER;
+
+        /* An end tag whose tag name is "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'tr') {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (fragment case) */
+            if(!$this->elementInScope($token['name'], true)) {
+                // Ignore.
+                $this->ignored = true;
+
+            /* Otherwise: */
+            } else {
+                /* Clear the stack back to a table row context. */
+                $this->clearStackToTableContext($clear);
+
+                /* Pop the current node (which will be a tr element) from the
+                stack of open elements. Switch the insertion mode to "in table
+                body". */
+                array_pop($this->stack);
+                $this->mode = self::IN_TABLE_BODY;
+            }
+
+        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+        "tbody", "tfoot", "thead", "tr" or an end tag whose tag name is "table" */
+        } elseif(($token['type'] === HTML5_Tokenizer::STARTTAG && in_array($token['name'],
+        array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead', 'tr'))) ||
+        ($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'table')) {
+            /* Act as if an end tag with the tag name "tr" had been seen, then,
+            if that token wasn't ignored, reprocess the current token. */
+            $this->emitToken(array(
+                'name' => 'tr',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+            if (!$this->ignored) $this->emitToken($token);
+
+        /* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. */
+            if(!$this->elementInScope($token['name'], true)) {
+                $this->ignored = true;
+
+            /* Otherwise: */
+            } else {
+                /* Otherwise, act as if an end tag with the tag name "tr" had
+                been seen, then reprocess the current token. */
+                $this->emitToken(array(
+                    'name' => 'tr',
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+
+                $this->emitToken($token);
+            }
+
+        /* An end tag whose tag name is one of: "body", "caption", "col",
+        "colgroup", "html", "td", "th" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && in_array($token['name'],
+        array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th'))) {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+
+        /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in table". */
+            $this->processWithRulesFor($token, self::IN_TABLE);
+        }
+    break;
+
+    case self::IN_CELL:
+        /* An end tag whose tag name is one of: "td", "th" */
+        if($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        ($token['name'] === 'td' || $token['name'] === 'th')) {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as that of the token, then this is a
+            parse error and the token must be ignored. */
+            if(!$this->elementInScope($token['name'], true)) {
+                $this->ignored = true;
+
+            /* Otherwise: */
+            } else {
+                /* Generate implied end tags, except for elements with the same
+                tag name as the token. */
+                $this->generateImpliedEndTags(array($token['name']));
+
+                /* Now, if the current node is not an element with the same tag
+                name as the token, then this is a parse error. */
+                // XERROR: Implement parse error code
+
+                /* Pop elements from this stack until an element with the same
+                tag name as the token has been popped from the stack. */
+                do {
+                    $node = array_pop($this->stack);
+                } while ($node->tagName !== $token['name']);
+
+                /* Clear the list of active formatting elements up to the last
+                marker. */
+                $this->clearTheActiveFormattingElementsUpToTheLastMarker();
+
+                /* Switch the insertion mode to "in row". (The current node
+                will be a tr element at this point.) */
+                $this->mode = self::IN_ROW;
+            }
+
+        /* A start tag whose tag name is one of: "caption", "col", "colgroup",
+        "tbody", "td", "tfoot", "th", "thead", "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && in_array($token['name'],
+        array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
+        'thead', 'tr'))) {
+            /* If the stack of open elements does not have a td or th element
+            in table scope, then this is a parse error; ignore the token.
+            (fragment case) */
+            if(!$this->elementInScope(array('td', 'th'), true)) {
+                // parse error
+                $this->ignored = true;
+
+            /* Otherwise, close the cell (see below) and reprocess the current
+            token. */
+            } else {
+                $this->closeCell();
+                $this->emitToken($token);
+            }
+
+        /* An end tag whose tag name is one of: "body", "caption", "col",
+        "colgroup", "html" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && in_array($token['name'],
+        array('body', 'caption', 'col', 'colgroup', 'html'))) {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+
+        /* An end tag whose tag name is one of: "table", "tbody", "tfoot",
+        "thead", "tr" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && in_array($token['name'],
+        array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
+            /* If the stack of open elements does not have a td or th element
+            in table scope, then this is a parse error; ignore the token.
+            (innerHTML case) */
+            if(!$this->elementInScope(array('td', 'th'), true)) {
+                // Parse error
+                $this->ignored = true;
+
+            /* Otherwise, close the cell (see below) and reprocess the current
+            token. */
+            } else {
+                $this->closeCell();
+                $this->emitToken($token);
+            }
+
+        /* Anything else */
+        } else {
+            /* Process the token as if the insertion mode was "in body". */
+            $this->processWithRulesFor($token, self::IN_BODY);
+        }
+    break;
+
+    case self::IN_SELECT:
+        /* Handle the token as follows: */
+
+        /* A character token */
+        if(
+            $token['type'] === HTML5_Tokenizer::CHARACTER ||
+            $token['type'] === HTML5_Tokenizer::SPACECHARACTER
+        ) {
+            /* Append the token's character to the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::INBODY);
+
+        /* A start tag token whose tag name is "option" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'option') {
+            /* If the current node is an option element, act as if an end tag
+            with the tag name "option" had been seen. */
+            if(end($this->stack)->tagName === 'option') {
+                $this->emitToken(array(
+                    'name' => 'option',
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+            }
+
+            /* Insert an HTML element for the token. */
+            $this->insertElement($token);
+
+        /* A start tag token whose tag name is "optgroup" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'optgroup') {
+            /* If the current node is an option element, act as if an end tag
+            with the tag name "option" had been seen. */
+            if(end($this->stack)->tagName === 'option') {
+                $this->emitToken(array(
+                    'name' => 'option',
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+            }
+
+            /* If the current node is an optgroup element, act as if an end tag
+            with the tag name "optgroup" had been seen. */
+            if(end($this->stack)->tagName === 'optgroup') {
+                $this->emitToken(array(
+                    'name' => 'optgroup',
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+            }
+
+            /* Insert an HTML element for the token. */
+            $this->insertElement($token);
+
+        /* An end tag token whose tag name is "optgroup" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'optgroup') {
+            /* First, if the current node is an option element, and the node
+            immediately before it in the stack of open elements is an optgroup
+            element, then act as if an end tag with the tag name "option" had
+            been seen. */
+            $elements_in_stack = count($this->stack);
+
+            if($this->stack[$elements_in_stack - 1]->tagName === 'option' &&
+            $this->stack[$elements_in_stack - 2]->tagName === 'optgroup') {
+                $this->emitToken(array(
+                    'name' => 'option',
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+            }
+
+            /* If the current node is an optgroup element, then pop that node
+            from the stack of open elements. Otherwise, this is a parse error,
+            ignore the token. */
+            if(end($this->stack)->tagName === 'optgroup') {
+                array_pop($this->stack);
+            } else {
+                // parse error
+                $this->ignored = true;
+            }
+
+        /* An end tag token whose tag name is "option" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'option') {
+            /* If the current node is an option element, then pop that node
+            from the stack of open elements. Otherwise, this is a parse error,
+            ignore the token. */
+            if(end($this->stack)->tagName === 'option') {
+                array_pop($this->stack);
+            } else {
+                // parse error
+                $this->ignored = true;
+            }
+
+        /* An end tag whose tag name is "select" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'select') {
+            /* If the stack of open elements does not have an element in table
+            scope with the same tag name as the token, this is a parse error.
+            Ignore the token. (fragment case) */
+            if(!$this->elementInScope($token['name'], true)) {
+                $this->ignored = true;
+                // parse error
+
+            /* Otherwise: */
+            } else {
+                /* Pop elements from the stack of open elements until a select
+                element has been popped from the stack. */
+                do {
+                    $node = array_pop($this->stack);
+                } while ($node->tagName !== 'select');
+
+                /* Reset the insertion mode appropriately. */
+                $this->resetInsertionMode();
+            }
+
+        /* A start tag whose tag name is "select" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'select') {
+            /* Parse error. Act as if the token had been an end tag with the
+            tag name "select" instead. */
+            $this->emitToken(array(
+                'name' => 'select',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        ($token['name'] === 'input' || $token['name'] === 'textarea')) {
+            // parse error
+            $this->emitToken(array(
+                'name' => 'select',
+                'type' => HTML5_Tokenizer::ENDTAG
+            ));
+            $this->emitToken($token);
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'script') {
+            $this->processWithRulesFor($token, self::IN_HEAD);
+
+        } elseif($token['type'] === HTML5_Tokenizer::EOF) {
+            // XERROR: If the current node is not the root html element, then this is a parse error.
+            /* Stop parsing */
+
+        /* Anything else */
+        } else {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+        }
+    break;
+
+    case self::IN_SELECT_IN_TABLE:
+
+        if($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        in_array($token['name'], array('caption', 'table', 'tbody',
+        'tfoot', 'thead', 'tr', 'td', 'th'))) {
+            // parse error
+            $this->emitToken(array(
+                'name' => 'select',
+                'type' => HTML5_Tokenizer::ENDTAG,
+            ));
+            $this->emitToken($token);
+
+        /* An end tag whose tag name is one of: "caption", "table", "tbody",
+        "tfoot", "thead", "tr", "td", "th" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        in_array($token['name'], array('caption', 'table', 'tbody', 'tfoot', 'thead', 'tr', 'td', 'th')))  {
+            /* Parse error. */
+            // parse error
+
+            /* If the stack of open elements has an element in table scope with
+            the same tag name as that of the token, then act as if an end tag
+            with the tag name "select" had been seen, and reprocess the token.
+            Otherwise, ignore the token. */
+            if($this->elementInScope($token['name'], true)) {
+                $this->emitToken(array(
+                    'name' => 'select',
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+
+                $this->emitToken($token);
+            } else {
+                $this->ignored = true;
+            }
+        } else {
+            $this->processWithRulesFor($token, self::IN_SELECT);
+        }
+    break;
+
+    case self::IN_FOREIGN_CONTENT:
+        if ($token['type'] === HTML5_Tokenizer::CHARACTER ||
+        $token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            $this->insertText($token['data']);
+        } elseif ($token['type'] === HTML5_Tokenizer::COMMENT) {
+            $this->insertComment($token['data']);
+        } elseif ($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // XERROR: parse error
+        } elseif ($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'script' && end($this->stack)->tagName === 'script' &&
+        end($this->stack)->namespaceURI === self::NS_SVG) {
+            array_pop($this->stack);
+            // a bunch of script running mumbo jumbo
+        } elseif (
+            ($token['type'] === HTML5_Tokenizer::STARTTAG &&
+                ((
+                    $token['name'] !== 'mglyph' &&
+                    $token['name'] !== 'malignmark' &&
+                    end($this->stack)->namespaceURI === self::NS_MATHML &&
+                    in_array(end($this->stack)->tagName, array('mi', 'mo', 'mn', 'ms', 'mtext'))
+                ) ||
+                (
+                    $token['name'] === 'svg' &&
+                    end($this->stack)->namespaceURI === self::NS_MATHML &&
+                    end($this->stack)->tagName === 'annotation-xml'
+                ) ||
+                (
+                    end($this->stack)->namespaceURI === self::NS_SVG &&
+                    in_array(end($this->stack)->tagName, array('foreignObject', 'desc', 'title'))
+                ) ||
+                (
+                    // XSKETCHY
+                    end($this->stack)->namespaceURI === self::NS_HTML
+                ))
+            ) || $token['type'] === HTML5_Tokenizer::ENDTAG
+        ) {
+            $this->processWithRulesFor($token, $this->secondary_mode);
+            /* If, after doing so, the insertion mode is still "in foreign 
+             * content", but there is no element in scope that has a namespace 
+             * other than the HTML namespace, switch the insertion mode to the 
+             * secondary insertion mode. */
+            if ($this->mode === self::IN_FOREIGN_CONTENT) {
+                $found = false;
+                // this basically duplicates elementInScope()
+                for ($i = count($this->stack) - 1; $i >= 0; $i--) {
+                    $node = $this->stack[$i];
+                    if ($node->namespaceURI !== self::NS_HTML) {
+                        $found = true;
+                        break;
+                    } elseif (in_array($node->tagName, array('table', 'html',
+                    'applet', 'caption', 'td', 'th', 'button', 'marquee',
+                    'object')) || ($node->tagName === 'foreignObject' &&
+                    $node->namespaceURI === self::NS_SVG)) {
+                        break;
+                    }
+                }
+                if (!$found) {
+                    $this->mode = $this->secondary_mode;
+                }
+            }
+        } elseif ($token['type'] === HTML5_Tokenizer::EOF || (
+        $token['type'] === HTML5_Tokenizer::STARTTAG &&
+        (in_array($token['name'], array('b', "big", "blockquote", "body", "br", 
+        "center", "code", "dd", "div", "dl", "dt", "em", "embed", "h1", "h2", 
+        "h3", "h4", "h5", "h6", "head", "hr", "i", "img", "li", "listing", 
+        "menu", "meta", "nobr", "ol", "p", "pre", "ruby", "s",  "small", 
+        "span", "strong", "strike",  "sub", "sup", "table", "tt", "u", "ul", 
+        "var")) || ($token['name'] === 'font' && ($this->getAttr($token, 'color') ||
+        $this->getAttr($token, 'face') || $this->getAttr($token, 'size')))))) {
+            // XERROR: parse error
+            do {
+                $node = array_pop($this->stack);
+            } while ($node->namespaceURI !== self::NS_HTML);
+            $this->stack[] = $node;
+            $this->mode = $this->secondary_mode;
+            $this->emitToken($token);
+        } elseif ($token['type'] === HTML5_Tokenizer::STARTTAG) {
+            static $svg_lookup = array(
+                'altglyph' => 'altGlyph',
+                'altglyphdef' => 'altGlyphDef',
+                'altglyphitem' => 'altGlyphItem',
+                'animatecolor' => 'animateColor',
+                'animatemotion' => 'animateMotion',
+                'animatetransform' => 'animateTransform',
+                'clippath' => 'clipPath',
+                'feblend' => 'feBlend',
+                'fecolormatrix' => 'feColorMatrix',
+                'fecomponenttransfer' => 'feComponentTransfer',
+                'fecomposite' => 'feComposite',
+                'feconvolvematrix' => 'feConvolveMatrix',
+                'fediffuselighting' => 'feDiffuseLighting',
+                'fedisplacementmap' => 'feDisplacementMap',
+                'fedistantlight' => 'feDistantLight',
+                'feflood' => 'feFlood',
+                'fefunca' => 'feFuncA',
+                'fefuncb' => 'feFuncB',
+                'fefuncg' => 'feFuncG',
+                'fefuncr' => 'feFuncR',
+                'fegaussianblur' => 'feGaussianBlur',
+                'feimage' => 'feImage',
+                'femerge' => 'feMerge',
+                'femergenode' => 'feMergeNode',
+                'femorphology' => 'feMorphology',
+                'feoffset' => 'feOffset',
+                'fepointlight' => 'fePointLight',
+                'fespecularlighting' => 'feSpecularLighting',
+                'fespotlight' => 'feSpotLight',
+                'fetile' => 'feTile',
+                'feturbulence' => 'feTurbulence',
+                'foreignobject' => 'foreignObject',
+                'glyphref' => 'glyphRef',
+                'lineargradient' => 'linearGradient',
+                'radialgradient' => 'radialGradient',
+                'textpath' => 'textPath',
+            );
+            $current = end($this->stack);
+            if ($current->namespaceURI === self::NS_MATHML) {
+                $token = $this->adjustMathMLAttributes($token);
+            }
+            if ($current->namespaceURI === self::NS_SVG &&
+            isset($svg_lookup[$token['name']])) {
+                $token['name'] = $svg_lookup[$token['name']];
+            }
+            if ($current->namespaceURI === self::NS_SVG) {
+                $token = $this->adjustSVGAttributes($token);
+            }
+            $token = $this->adjustForeignAttributes($token);
+            $this->insertForeignElement($token, $current->namespaceURI);
+            if (isset($token['self-closing'])) {
+                array_pop($this->stack);
+                // XERROR: acknowledge self-closing flag
+            }
+        }
+    break;
+
+    case self::AFTER_BODY:
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Process the token as it would be processed if the insertion mode
+            was "in body". */
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the first element in the stack of open
+            elements (the html element), with the data attribute set to the
+            data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->stack[0]->appendChild($comment);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* An end tag with the tag name "html" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG && $token['name'] === 'html') {
+            /*     If the parser was originally created as part of the HTML
+             *     fragment parsing algorithm, this is a parse error; ignore
+             *     the token. (fragment case) */
+            $this->ignored = true;
+            // XERROR: implement this
+
+            $this->mode = self::AFTER_AFTER_BODY;
+
+        } elseif($token['type'] === HTML5_Tokenizer::EOF) {
+            /* Stop parsing */
+
+        /* Anything else */
+        } else {
+            /* Parse error. Set the insertion mode to "in body" and reprocess
+            the token. */
+            $this->mode = self::IN_BODY;
+            $this->emitToken($token);
+        }
+    break;
+
+    case self::IN_FRAMESET:
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        /* A start tag with the tag name "frameset" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'frameset') {
+            $this->insertElement($token);
+
+        /* An end tag with the tag name "frameset" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'frameset') {
+            /* If the current node is the root html element, then this is a
+            parse error; ignore the token. (fragment case) */
+            if(end($this->stack)->tagName === 'html') {
+                $this->ignored = true;
+                // Parse error
+
+            } else {
+                /* Otherwise, pop the current node from the stack of open
+                elements. */
+                array_pop($this->stack);
+
+                /* If the parser was not originally created as part of the HTML 
+                 * fragment parsing algorithm  (fragment case), and the current 
+                 * node is no longer a frameset element, then switch the 
+                 * insertion mode to "after frameset". */
+                $this->mode = self::AFTER_FRAMESET;
+            }
+
+        /* A start tag with the tag name "frame" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'frame') {
+            /* Insert an HTML element for the token. */
+            $this->insertElement($token);
+
+            /* Immediately pop the current node off the stack of open elements. */
+            array_pop($this->stack);
+
+            // XERROR: Acknowledge the token's self-closing flag, if it is set.
+
+        /* A start tag with the tag name "noframes" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'noframes') {
+            /* Process the token using the rules for the "in head" insertion mode. */
+            $this->processwithRulesFor($token, self::IN_HEAD);
+
+        } elseif($token['type'] === HTML5_Tokenizer::EOF) {
+            // XERROR: If the current node is not the root html element, then this is a parse error.
+            /* Stop parsing */
+        /* Anything else */
+        } else {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+        }
+    break;
+
+    case self::AFTER_FRAMESET:
+        /* Handle the token as follows: */
+
+        /* A character token that is one of one of U+0009 CHARACTER TABULATION,
+        U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
+        U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
+        if($token['type'] === HTML5_Tokenizer::SPACECHARACTER) {
+            /* Append the character to the current node. */
+            $this->insertText($token['data']);
+
+        /* A comment token */
+        } elseif($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the current node with the data
+            attribute set to the data given in the comment token. */
+            $this->insertComment($token['data']);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE) {
+            // parse error
+
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html') {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* An end tag with the tag name "html" */
+        } elseif($token['type'] === HTML5_Tokenizer::ENDTAG &&
+        $token['name'] === 'html') {
+            $this->mode = self::AFTER_AFTER_FRAMESET;
+
+        /* A start tag with the tag name "noframes" */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG &&
+        $token['name'] === 'noframes') {
+            $this->processWithRulesFor($token, self::IN_HEAD);
+
+        } elseif($token['type'] === HTML5_Tokenizer::EOF) {
+            /* Stop parsing */
+
+        /* Anything else */
+        } else {
+            /* Parse error. Ignore the token. */
+            $this->ignored = true;
+        }
+    break;
+
+    case self::AFTER_AFTER_BODY:
+        /* A comment token */
+        if($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the Document object with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->dom->appendChild($comment);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE ||
+        $token['type'] === HTML5_Tokenizer::SPACECHARACTER ||
+        ($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html')) {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* An end-of-file token */
+        } elseif($token['type'] === HTML5_Tokenizer::EOF) {
+            /* OMG DONE!! */
+        } else {
+            // parse error
+            $this->mode = self::IN_BODY;
+            $this->emitToken($token);
+        }
+    break;
+
+    case self::AFTER_AFTER_FRAMESET:
+        /* A comment token */
+        if($token['type'] === HTML5_Tokenizer::COMMENT) {
+            /* Append a Comment node to the Document object with the data
+            attribute set to the data given in the comment token. */
+            $comment = $this->dom->createComment($token['data']);
+            $this->dom->appendChild($comment);
+
+        } elseif($token['type'] === HTML5_Tokenizer::DOCTYPE ||
+        $token['type'] === HTML5_Tokenizer::SPACECHARACTER ||
+        ($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'html')) {
+            $this->processWithRulesFor($token, self::IN_BODY);
+
+        /* An end-of-file token */
+        } elseif($token['type'] === HTML5_Tokenizer::EOF) {
+            /* OMG DONE!! */
+        } elseif($token['type'] === HTML5_Tokenizer::STARTTAG && $token['name'] === 'nofrmaes') {
+            $this->processWithRulesFor($token, self::IN_HEAD);
+        } else {
+            // parse error
+        }
+    break;
+    }
+        // end funky indenting
+        }
+
+    private function insertElement($token, $append = true) {
+        $el = $this->dom->createElementNS(self::NS_HTML, $token['name']);
+
+        if (!empty($token['attr'])) {
+            foreach($token['attr'] as $attr) {
+                if(!$el->hasAttribute($attr['name'])) {
+                    $el->setAttribute($attr['name'], $attr['value']);
+                }
+            }
+        }
+        if ($append) {
+            $this->appendToRealParent($el);
+            $this->stack[] = $el;
+        }
+
+        return $el;
+    }
+
+    private function insertText($data) {
+        if ($data === '') return;
+        if ($this->ignore_lf_token) {
+            if ($data[0] === "\n") {
+                $data = substr($data, 1);
+                if ($data === false) return;
+            }
+        }
+        $text = $this->dom->createTextNode($data);
+        $this->appendToRealParent($text);
+    }
+
+    private function insertComment($data) {
+        $comment = $this->dom->createComment($data);
+        $this->appendToRealParent($comment);
+    }
+
+    private function appendToRealParent($node) {
+        // this is only for the foster_parent case
+        /* If the current node is a table, tbody, tfoot, thead, or tr
+        element, then, whenever a node would be inserted into the current
+        node, it must instead be inserted into the foster parent element. */
+        if(!$this->foster_parent || !in_array(end($this->stack)->tagName,
+        array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
+            end($this->stack)->appendChild($node);
+        } else {
+            $this->fosterParent($node);
+        }
+    }
+
+    private function elementInScope($el, $table = false) {
+        if(is_array($el)) {
+            foreach($el as $element) {
+                if($this->elementInScope($element, $table)) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        $leng = count($this->stack);
+
+        for($n = 0; $n < $leng; $n++) {
+            /* 1. Initialise node to be the current node (the bottommost node of
+            the stack). */
+            $node = $this->stack[$leng - 1 - $n];
+
+            if($node->tagName === $el) {
+                /* 2. If node is the target node, terminate in a match state. */
+                return true;
+
+            // these are the common states for "in scope" and "in table scope"
+            } elseif($node->tagName === 'table' || $node->tagName === 'html') {
+                return false;
+
+            // these are only valid for "in scope"
+            } elseif(!$table &&
+            (in_array($node->tagName, array('applet', 'caption', 'td',
+                'th', 'button', 'marquee', 'object')) ||
+                $node->tagName === 'foreignObject' && $node->namespaceURI === self::NS_SVG)) {
+                return false;
+            }
+
+            /* Otherwise, set node to the previous entry in the stack of open
+            elements and return to step 2. (This will never fail, since the loop
+            will always terminate in the previous step if the top of the stack
+            is reached.) */
+        }
+    }
+
+    private function reconstructActiveFormattingElements() {
+        /* 1. If there are no entries in the list of active formatting elements,
+        then there is nothing to reconstruct; stop this algorithm. */
+        $formatting_elements = count($this->a_formatting);
+
+        if($formatting_elements === 0) {
+            return false;
+        }
+
+        /* 3. Let entry be the last (most recently added) element in the list
+        of active formatting elements. */
+        $entry = end($this->a_formatting);
+
+        /* 2. If the last (most recently added) entry in the list of active
+        formatting elements is a marker, or if it is an element that is in the
+        stack of open elements, then there is nothing to reconstruct; stop this
+        algorithm. */
+        if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
+            return false;
+        }
+
+        for($a = $formatting_elements - 1; $a >= 0; true) {
+            /* 4. If there are no entries before entry in the list of active
+            formatting elements, then jump to step 8. */
+            if($a === 0) {
+                $step_seven = false;
+                break;
+            }
+
+            /* 5. Let entry be the entry one earlier than entry in the list of
+            active formatting elements. */
+            $a--;
+            $entry = $this->a_formatting[$a];
+
+            /* 6. If entry is neither a marker nor an element that is also in
+            thetack of open elements, go to step 4. */
+            if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
+                break;
+            }
+        }
+
+        while(true) {
+            /* 7. Let entry be the element one later than entry in the list of
+            active formatting elements. */
+            if(isset($step_seven) && $step_seven === true) {
+                $a++;
+                $entry = $this->a_formatting[$a];
+            }
+
+            /* 8. Perform a shallow clone of the element entry to obtain clone. */
+            $clone = $entry->cloneNode();
+
+            /* 9. Append clone to the current node and push it onto the stack
+            of open elements  so that it is the new current node. */
+            $this->appendToRealParent($clone);
+            $this->stack[] = $clone;
+
+            /* 10. Replace the entry for entry in the list with an entry for
+            clone. */
+            $this->a_formatting[$a] = $clone;
+
+            /* 11. If the entry for clone in the list of active formatting
+            elements is not the last entry in the list, return to step 7. */
+            if(end($this->a_formatting) !== $clone) {
+                $step_seven = true;
+            } else {
+                break;
+            }
+        }
+    }
+
+    private function clearTheActiveFormattingElementsUpToTheLastMarker() {
+        /* When the steps below require the UA to clear the list of active
+        formatting elements up to the last marker, the UA must perform the
+        following steps: */
+
+        while(true) {
+            /* 1. Let entry be the last (most recently added) entry in the list
+            of active formatting elements. */
+            $entry = end($this->a_formatting);
+
+            /* 2. Remove entry from the list of active formatting elements. */
+            array_pop($this->a_formatting);
+
+            /* 3. If entry was a marker, then stop the algorithm at this point.
+            The list has been cleared up to the last marker. */
+            if($entry === self::MARKER) {
+                break;
+            }
+        }
+    }
+
+    private function generateImpliedEndTags($exclude = array()) {
+        /* When the steps below require the UA to generate implied end tags,
+        then, if the current node is a dd element, a dt element, an li element,
+        a p element, a td element, a th  element, or a tr element, the UA must
+        act as if an end tag with the respective tag name had been seen and
+        then generate implied end tags again. */
+        $node = end($this->stack);
+        $elements = array_diff(array('dd', 'dt', 'li', 'p', 'td', 'th', 'tr'), $exclude);
+
+        while(in_array(end($this->stack)->tagName, $elements)) {
+            array_pop($this->stack);
+        }
+    }
+
+    private function getElementCategory($node) {
+        if (!is_object($node)) debug_print_backtrace();
+        $name = $node->tagName;
+        if(in_array($name, $this->special))
+            return self::SPECIAL;
+
+        elseif(in_array($name, $this->scoping))
+            return self::SCOPING;
+
+        elseif(in_array($name, $this->formatting))
+            return self::FORMATTING;
+
+        else
+            return self::PHRASING;
+    }
+
+    private function clearStackToTableContext($elements) {
+        /* When the steps above require the UA to clear the stack back to a
+        table context, it means that the UA must, while the current node is not
+        a table element or an html element, pop elements from the stack of open
+        elements. */
+        while(true) {
+            $name = end($this->stack)->tagName;
+
+            if(in_array($name, $elements)) {
+                break;
+            } else {
+                array_pop($this->stack);
+            }
+        }
+    }
+
+    private function resetInsertionMode($context = null) {
+        /* 1. Let last be false. */
+        $last = false;
+        $leng = count($this->stack);
+
+        for($n = $leng - 1; $n >= 0; $n--) {
+            /* 2. Let node be the last node in the stack of open elements. */
+            $node = $this->stack[$n];
+
+            /* 3. If node is the first node in the stack of open elements, then 
+             * set last to true and set node to the context  element. (fragment 
+             * case) */
+            if($this->stack[0]->isSameNode($node)) {
+                $last = true;
+                $node = $context;
+            }
+
+            /* 4. If node is a select element, then switch the insertion mode to
+            "in select" and abort these steps. (fragment case) */
+            if($node->tagName === 'select') {
+                $this->mode = self::IN_SELECT;
+                break;
+
+            /* 5. If node is a td or th element, then switch the insertion mode
+            to "in cell" and abort these steps. */
+            } elseif($node->tagName === 'td' || $node->nodeName === 'th') {
+                $this->mode = self::IN_CELL;
+                break;
+
+            /* 6. If node is a tr element, then switch the insertion mode to
+            "in    row" and abort these steps. */
+            } elseif($node->tagName === 'tr') {
+                $this->mode = self::IN_ROW;
+                break;
+
+            /* 7. If node is a tbody, thead, or tfoot element, then switch the
+            insertion mode to "in table body" and abort these steps. */
+            } elseif(in_array($node->tagName, array('tbody', 'thead', 'tfoot'))) {
+                $this->mode = self::IN_TABLE_BODY;
+                break;
+
+            /* 8. If node is a caption element, then switch the insertion mode
+            to "in caption" and abort these steps. */
+            } elseif($node->tagName === 'caption') {
+                $this->mode = self::IN_CAPTION;
+                break;
+
+            /* 9. If node is a colgroup element, then switch the insertion mode
+            to "in column group" and abort these steps. (innerHTML case) */
+            } elseif($node->tagName === 'colgroup') {
+                $this->mode = self::IN_COLUMN_GROUP;
+                break;
+
+            /* 10. If node is a table element, then switch the insertion mode
+            to "in table" and abort these steps. */
+            } elseif($node->tagName === 'table') {
+                $this->mode = self::IN_TABLE;
+                break;
+
+            /* 11. If node is an element from the MathML namespace or the SVG 
+             * namespace, then switch the insertion mode to "in foreign 
+             * content", let the secondary insertion mode be "in body", and 
+             * abort these steps. */
+            } elseif($node->namespaceURI === self::NS_SVG ||
+            $node->namespaceURI === self::NS_MATHML) {
+                $this->mode = self::IN_FOREIGN_CONTENT;
+                $this->secondary_mode = self::IN_BODY;
+                break;
+
+            /* 12. If node is a head element, then switch the insertion mode
+            to "in body" ("in body"! not "in head"!) and abort these steps.
+            (fragment case) */
+            } elseif($node->tagName === 'head') {
+                $this->mode = self::IN_BODY;
+                break;
+
+            /* 13. If node is a body element, then switch the insertion mode to
+            "in body" and abort these steps. */
+            } elseif($node->tagName === 'body') {
+                $this->mode = self::IN_BODY;
+                break;
+
+            /* 14. If node is a frameset element, then switch the insertion
+            mode to "in frameset" and abort these steps. (fragment case) */
+            } elseif($node->tagName === 'frameset') {
+                $this->mode = self::IN_FRAMESET;
+                break;
+
+            /* 15. If node is an html element, then: if the head element
+            pointer is null, switch the insertion mode to "before head",
+            otherwise, switch the insertion mode to "after head". In either
+            case, abort these steps. (fragment case) */
+            } elseif($node->tagName === 'html') {
+                $this->mode = ($this->head_pointer === null)
+                    ? self::BEFORE_HEAD
+                    : self::AFTER_HEAD;
+
+                break;
+
+            /* 16. If last is true, then set the insertion mode to "in body"
+            and    abort these steps. (fragment case) */
+            } elseif($last) {
+                $this->mode = self::IN_BODY;
+                break;
+            }
+        }
+    }
+
+    private function closeCell() {
+        /* If the stack of open elements has a td or th element in table scope,
+        then act as if an end tag token with that tag name had been seen. */
+        foreach(array('td', 'th') as $cell) {
+            if($this->elementInScope($cell, true)) {
+                $this->emitToken(array(
+                    'name' => $cell,
+                    'type' => HTML5_Tokenizer::ENDTAG
+                ));
+
+                break;
+            }
+        }
+    }
+
+    private function processWithRulesFor($token, $mode) {
+        /* "using the rules for the m insertion mode", where m is one of these
+         * modes, the user agent must use the rules described under the m
+         * insertion mode's section, but must leave the insertion mode
+         * unchanged unless the rules in m themselves switch the insertion mode
+         * to a new value. */
+        return $this->emitToken($token, $mode);
+    }
+
+    private function insertCDATAElement($token) {
+        $this->insertElement($token);
+        $this->original_mode = $this->mode;
+        $this->mode = self::IN_CDATA_RCDATA;
+        $this->content_model = HTML5_Tokenizer::CDATA;
+    }
+
+    private function insertRCDATAElement($token) {
+        $this->insertElement($token);
+        $this->original_mode = $this->mode;
+        $this->mode = self::IN_CDATA_RCDATA;
+        $this->content_model = HTML5_Tokenizer::RCDATA;
+    }
+
+    private function getAttr($token, $key) {
+        if (!isset($token['attr'])) return false;
+        $ret = false;
+        foreach ($token['attr'] as $keypair) {
+            if ($keypair['name'] === $key) $ret = $keypair['value'];
+        }
+        return $ret;
+    }
+
+    private function getCurrentTable() {
+        /* The current table is the last table  element in the stack of open 
+         * elements, if there is one. If there is no table element in the stack 
+         * of open elements (fragment case), then the current table is the 
+         * first element in the stack of open elements (the html element). */
+        for ($i = count($this->stack) - 1; $i >= 0; $i--) {
+            if ($this->stack[$i]->tagName === 'table') {
+                return $this->stack[$i];
+            }
+        }
+        return $this->stack[0];
+    }
+
+    private function getFosterParent() {
+        /* The foster parent element is the parent element of the last
+        table element in the stack of open elements, if there is a
+        table element and it has such a parent element. If there is no
+        table element in the stack of open elements (innerHTML case),
+        then the foster parent element is the first element in the
+        stack of open elements (the html  element). Otherwise, if there
+        is a table element in the stack of open elements, but the last
+        table element in the stack of open elements has no parent, or
+        its parent node is not an element, then the foster parent
+        element is the element before the last table element in the
+        stack of open elements. */
+        for($n = count($this->stack) - 1; $n >= 0; $n--) {
+            if($this->stack[$n]->tagName === 'table') {
+                $table = $this->stack[$n];
+                break;
+            }
+        }
+
+        if(isset($table) && $table->parentNode !== null) {
+            return $table->parentNode;
+
+        } elseif(!isset($table)) {
+            return $this->stack[0];
+
+        } elseif(isset($table) && ($table->parentNode === null ||
+        $table->parentNode->nodeType !== XML_ELEMENT_NODE)) {
+            return $this->stack[$n - 1];
+        }
+    }
+
+    public function fosterParent($node) {
+        $foster_parent = $this->getFosterParent();
+        $table = $this->getCurrentTable(); // almost equivalent to last table element, except it can be html
+        /* When a node node is to be foster parented, the node node  must be 
+         * inserted into the foster parent element, and the current table must 
+         * be marked as tainted. (Once the current table has been tainted, 
+         * whitespace characters are inserted into the foster parent element 
+         * instead of the current node.) */
+        $table->tainted = true;
+        /* If the foster parent element is the parent element of the last table 
+         * element in the stack of open elements, then node must be inserted 
+         * immediately before the last table element in the stack of open 
+         * elements in the foster parent element; otherwise, node must be 
+         * appended to the foster parent element. */
+        if ($table->tagName === 'table' && $table->parentNode->isSameNode($foster_parent)) {
+            $foster_parent->insertBefore($node, $table);
+        } else {
+            $foster_parent->appendChild($node);
+        }
+    }
+
+    /**
+     * For debugging, prints the stack
+     */
+    private function printStack() {
+        $names = array();
+        foreach ($this->stack as $i => $element) {
+            $names[] = $element->tagName;
+        }
+        echo "  -> stack [" . implode(', ', $names) . "]\n";
+    }
+
+    /**
+     * For debugging, prints active formatting elements
+     */
+    private function printActiveFormattingElements() {
+        if (!$this->a_formatting) return;
+        $names = array();
+        foreach ($this->a_formatting as $node) {
+            if ($node === self::MARKER) $names[] = 'MARKER';
+            else $names[] = $node->tagName;
+        }
+        echo "  -> active formatting [" . implode(', ', $names) . "]\n";
+    }
+
+    public function currentTableIsTainted() {
+        return !empty($this->getCurrentTable()->tainted);
+    }
+
+    /**
+     * Sets up the tree constructor for building a fragment.
+     */
+    public function setupContext($context = null) {
+        $this->fragment = true;
+        if ($context) {
+            $context = $this->dom->createElementNS(self::NS_HTML, $context);
+            /* 4.1. Set the HTML parser's tokenization  stage's content model
+             * flag according to the context element, as follows: */
+            switch ($context->tagName) {
+            case 'title': case 'textarea':
+                $this->content_model = HTML5_Tokenizer::RCDATA;
+                break;
+            case 'style': case 'script': case 'xmp': case 'iframe':
+            case 'noembed': case 'noframes':
+                $this->content_model = HTML5_Tokenizer::CDATA;
+                break;
+            case 'noscript':
+                // XSCRIPT: assuming scripting is enabled
+                $this->content_model = HTML5_Tokenizer::CDATA;
+                break;
+            case 'plaintext':
+                $this->content_model = HTML5_Tokenizer::PLAINTEXT;
+                break;
+            }
+            /* 4.2. Let root be a new html element with no attributes. */
+            $root = $this->dom->createElementNS(self::NS_HTML, 'html');
+            $this->root = $root;
+            /* 4.3 Append the element root to the Document node created above. */
+            $this->dom->appendChild($root);
+            /* 4.4 Set up the parser's stack of open elements so that it 
+             * contains just the single element root. */
+            $this->stack = array($root);
+            /* 4.5 Reset the parser's insertion mode appropriately. */
+            $this->resetInsertionMode($context);
+            /* 4.6 Set the parser's form element pointer  to the nearest node 
+             * to the context element that is a form element (going straight up 
+             * the ancestor chain, and including the element itself, if it is a 
+             * form element), or, if there is no such form element, to null. */
+            $node = $context;
+            do {
+                if ($node->tagName === 'form') {
+                    $this->form_pointer = $node;
+                    break;
+                }
+            } while ($node = $node->parentNode);
+        }
+    }
+
+    public function adjustMathMLAttributes($token) {
+        foreach ($token['attr'] as &$kp) {
+            if ($kp['name'] === 'definitionurl') {
+                $kp['name'] = 'definitionURL';
+            }
+        }
+        return $token;
+    }
+
+    public function adjustSVGAttributes($token) {
+        static $lookup = array(
+            'attributename' => 'attributeName',
+            'attributetype' => 'attributeType',
+            'basefrequency' => 'baseFrequency',
+            'baseprofile' => 'baseProfile',
+            'calcmode' => 'calcMode',
+            'clippathunits' => 'clipPathUnits',
+            'contentscripttype' => 'contentScriptType',
+            'contentstyletype' => 'contentStyleType',
+            'diffuseconstant' => 'diffuseConstant',
+            'edgemode' => 'edgeMode',
+            'externalresourcesrequired' => 'externalResourcesRequired',
+            'filterres' => 'filterRes',
+            'filterunits' => 'filterUnits',
+            'glyphref' => 'glyphRef',
+            'gradienttransform' => 'gradientTransform',
+            'gradientunits' => 'gradientUnits',
+            'kernelmatrix' => 'kernelMatrix',
+            'kernelunitlength' => 'kernelUnitLength',
+            'keypoints' => 'keyPoints',
+            'keysplines' => 'keySplines',
+            'keytimes' => 'keyTimes',
+            'lengthadjust' => 'lengthAdjust',
+            'limitingconeangle' => 'limitingConeAngle',
+            'markerheight' => 'markerHeight',
+            'markerunits' => 'markerUnits',
+            'markerwidth' => 'markerWidth',
+            'maskcontentunits' => 'maskContentUnits',
+            'maskunits' => 'maskUnits',
+            'numoctaves' => 'numOctaves',
+            'pathlength' => 'pathLength',
+            'patterncontentunits' => 'patternContentUnits',
+            'patterntransform' => 'patternTransform',
+            'patternunits' => 'patternUnits',
+            'pointsatx' => 'pointsAtX',
+            'pointsaty' => 'pointsAtY',
+            'pointsatz' => 'pointsAtZ',
+            'preservealpha' => 'preserveAlpha',
+            'preserveaspectratio' => 'preserveAspectRatio',
+            'primitiveunits' => 'primitiveUnits',
+            'refx' => 'refX',
+            'refy' => 'refY',
+            'repeatcount' => 'repeatCount',
+            'repeatdur' => 'repeatDur',
+            'requiredextensions' => 'requiredExtensions',
+            'requiredfeatures' => 'requiredFeatures',
+            'specularconstant' => 'specularConstant',
+            'specularexponent' => 'specularExponent',
+            'spreadmethod' => 'spreadMethod',
+            'startoffset' => 'startOffset',
+            'stddeviation' => 'stdDeviation',
+            'stitchtiles' => 'stitchTiles',
+            'surfacescale' => 'surfaceScale',
+            'systemlanguage' => 'systemLanguage',
+            'tablevalues' => 'tableValues',
+            'targetx' => 'targetX',
+            'targety' => 'targetY',
+            'textlength' => 'textLength',
+            'viewbox' => 'viewBox',
+            'viewtarget' => 'viewTarget',
+            'xchannelselector' => 'xChannelSelector',
+            'ychannelselector' => 'yChannelSelector',
+            'zoomandpan' => 'zoomAndPan',
+        );
+        foreach ($token['attr'] as &$kp) {
+            if (isset($lookup[$kp['name']])) {
+                $kp['name'] = $lookup[$kp['name']];
+            }
+        }
+        return $token;
+    }
+
+    public function adjustForeignAttributes($token) {
+        static $lookup = array(
+            'xlink:actuate' => array('xlink', 'actuate', self::NS_XLINK),
+            'xlink:arcrole' => array('xlink', 'arcrole', self::NS_XLINK),
+            'xlink:href' => array('xlink', 'href', self::NS_XLINK),
+            'xlink:role' => array('xlink', 'role', self::NS_XLINK),
+            'xlink:show' => array('xlink', 'show', self::NS_XLINK),
+            'xlink:title' => array('xlink', 'title', self::NS_XLINK),
+            'xlink:type' => array('xlink', 'type', self::NS_XLINK),
+            'xml:base' => array('xml', 'base', self::NS_XML),
+            'xml:lang' => array('xml', 'lang', self::NS_XML),
+            'xml:space' => array('xml', 'space', self::NS_XML),
+            'xmlns' => array(null, 'xmlns', self::NS_XMLNS),
+            'xmlns:xlink' => array('xmlns', 'xlink', self::NS_XMLNS),
+        );
+        foreach ($token['attr'] as &$kp) {
+            if (isset($lookup[$kp['name']])) {
+                $kp['name'] = $lookup[$kp['name']];
+            }
+        }
+        return $token;
+    }
+
+    public function insertForeignElement($token, $namespaceURI) {
+        $el = $this->dom->createElementNS($namespaceURI, $token['name']);
+        if (!empty($token['attr'])) {
+            foreach ($token['attr'] as $kp) {
+                $attr = $kp['name'];
+                if (is_array($attr)) {
+                    $ns = $attr[2];
+                    $attr = $attr[1];
+                } else {
+                    $ns = self::NS_HTML;
+                }
+                if (!$el->hasAttributeNS($ns, $attr)) {
+                    // XSKETCHY: work around godawful libxml bug
+                    if ($ns === self::NS_XLINK) {
+                        $el->setAttribute('xlink:'.$attr, $kp['value']);
+                    } elseif ($ns === self::NS_HTML) {
+                        // Another godawful libxml bug
+                        $el->setAttribute($attr, $kp['value']);
+                    } else {
+                        $el->setAttributeNS($ns, $attr, $kp['value']);
+                    }
+                }
+            }
+        }
+        $this->appendToRealParent($el);
+        $this->stack[] = $el;
+        // XERROR: see below
+        /* If the newly created element has an xmlns attribute in the XMLNS 
+         * namespace  whose value is not exactly the same as the element's 
+         * namespace, that is a parse error. Similarly, if the newly created 
+         * element has an xmlns:xlink attribute in the XMLNS namespace whose 
+         * value is not the XLink Namespace, that is a parse error. */
+    }
+
+    public function save() {
+        $this->dom->normalize();
+        if (!$this->fragment) {
+            return $this->dom;
+        } else {
+            if ($this->root) {
+                return $this->root->childNodes;
+            } else {
+                return $this->dom->childNodes;
+            }
+        }
+    }
+}
+
diff --git a/library/HTML5/named-character-references.ser b/library/HTML5/named-character-references.ser
new file mode 100644
index 000000000..3004c4b91
--- /dev/null
+++ b/library/HTML5/named-character-references.ser
@@ -0,0 +1 @@
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\ No newline at end of file