add spam engine

6 files changed, 1779 insertions, 0 deletions

diff --git a/library/spam/b8/b8.php b/library/spam/b8/b8.php
new file mode 100644
index 000000000..ea1e15ffa
--- /dev/null
+++ b/library/spam/b8/b8.php
@@ -0,0 +1,503 @@
+<?php
+
+#   Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+#
+#   b8 - A Bayesian spam filter written in PHP 5
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU Lesser General Public License as published by
+#   the Free Software Foundation in version 2.1 of the License.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+#   License for more details.
+#
+#   You should have received a copy of the GNU Lesser General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+
+/**
+ * Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+ *
+ * @license LGPL
+ * @access public
+ * @package b8
+ * @author Tobias Leupold
+ * @author Oliver Lillie (aka buggedcom) (original PHP 5 port)
+ */
+
+class b8
+{
+
+	public $config = array(
+		'min_size'      => 3,
+		'max_size'      => 30,
+		'allow_numbers' => FALSE,
+		'lexer'         => 'default',
+		'degenerator'   => 'default',
+		'storage'       => 'dba',
+		'use_relevant'  => 15,
+		'min_dev'       => 0.2,
+		'rob_s'         => 0.3,
+		'rob_x'         => 0.5
+	);
+
+	private $_lexer      = NULL;
+	private $_database   = NULL;
+	private $_token_data = NULL;
+
+	const SPAM    = 'spam';
+	const HAM     = 'ham';
+	const LEARN   = 'learn';
+	const UNLEARN = 'unlearn';
+
+	const STARTUP_FAIL_DATABASE = 'STARTUP_FAIL_DATABASE';
+	const STARTUP_FAIL_LEXER    = 'STARTUP_FAIL_LEXER';
+	const TRAINER_CATEGORY_FAIL = 'TRAINER_CATEGORY_FAIL';
+
+	/**
+	 * Constructs b8
+	 *
+	 * @access public
+	 * @return void
+	 */
+
+	function __construct($config = array(), $database_config)
+	{
+
+		# Validate config data
+
+		if(count($config) > 0) {
+
+			foreach ($config as $name=>$value) {
+
+				switch($name) {
+
+					case 'min_dev':
+					case 'rob_s':
+					case 'rob_x':
+						$this->config[$name] = (float) $value;
+						break;
+
+					case 'min_size':
+					case 'max_size':
+					case 'use_relevant':
+						$this->config[$name] = (int) $value;
+						break;
+
+					case 'allow_numbers':
+						$this->config[$name] = (bool) $value;
+						break;
+
+					case 'lexer':
+						$value = (string) strtolower($value);
+						$this->config[$name] = is_file(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'lexer' . DIRECTORY_SEPARATOR . "lexer_" . $value . '.php') === TRUE ? $value : 'default';
+						break;
+
+					case 'storage':
+						$this->config[$name] = (string) $value;
+						break;
+
+				}
+
+			}
+
+		}
+
+		# Setup the database backend
+
+		# Get the basic storage class used by all backends
+		if($this->load_class('b8_storage_base', dirname(__FILE__) . DIRECTORY_SEPARATOR . 'storage' . DIRECTORY_SEPARATOR . 'storage_base.php') === FALSE)
+			return;
+
+		# Get the degenerator we need
+		if($this->load_class('b8_degenerator_' . $this->config['degenerator'], dirname(__FILE__) . DIRECTORY_SEPARATOR . 'degenerator' . DIRECTORY_SEPARATOR . 'degenerator_' . $this->config['degenerator'] . '.php') === FALSE)
+			return;
+
+		# Get the actual storage backend we need
+		if($this->load_class('b8_storage_' . $this->config['storage'], dirname(__FILE__) . DIRECTORY_SEPARATOR . 'storage' . DIRECTORY_SEPARATOR . 'storage_' . $this->config['storage'] . '.php') === FALSE)
+			return;
+
+		# Setup the backend
+		$class = 'b8_storage_' . $this->config['storage'];
+		$this->_database = new $class(
+			$database_config,
+			$this->config['degenerator'], date('ymd')
+		);
+
+		# Setup the lexer class
+
+		if($this->load_class('b8_lexer_' . $this->config['lexer'], dirname(__FILE__) . DIRECTORY_SEPARATOR . 'lexer' . DIRECTORY_SEPARATOR . 'lexer_' . $this->config['lexer'] . '.php') === FALSE)
+			return;
+
+		$class = 'b8_lexer_' . $this->config['lexer'];
+		$this->_lexer = new $class(
+			array(
+				'min_size' => $this->config['min_size'],
+				'max_size' => $this->config['max_size'],
+				'allow_numbers' => $this->config['allow_numbers']
+			)
+		);
+
+	}
+
+	/**
+	 * Load a class file if a class has not been defined yet.
+	 *
+	 * @access public
+	 * @return boolean Returns TRUE if everything is okay, otherwise FALSE.
+	 */
+
+	public function load_class($class_name, $class_file)
+	{
+
+		if(class_exists($class_name, FALSE) === FALSE) {
+
+			$included = require_once $class_file;
+
+			if($included === FALSE or class_exists($class_name, FALSE) === FALSE)
+				return FALSE;
+
+		}
+
+		return TRUE;
+
+	}
+
+	/**
+	 * Validates the class has all it needs to work.
+	 *
+	 * @access public
+	 * @return mixed Returns TRUE if everything is okay, otherwise an error code.
+	 */
+
+	public function validate()
+	{
+
+		if($this->_database === NULL)
+			return self::STARTUP_FAIL_DATABASE;
+
+		# Connect the database backend if we aren't connected yet
+
+		elseif($this->_database->connected === FALSE) {
+
+			$connection = $this->_database->connect();
+
+			if($connection !== TRUE)
+				return $connection;
+
+		}
+
+		if($this->_lexer === NULL)
+			return self::STARTUP_FAIL_LEXER;
+
+		return TRUE;
+
+	}
+
+	/**
+	 * Classifies a text
+	 *
+	 * @access public
+	 * @package default
+	 * @param string $text
+	 * @return float The rating between 0 (ham) and 1 (spam)
+	 */
+
+	public function classify($text)
+	{
+
+		# Validate the startup
+
+		$started_up = $this->validate();
+
+		if($started_up !== TRUE)
+			return $started_up;
+
+		# Get the internal database variables, containing the number of ham and
+		# spam texts so the spam probability can be calculated in relation to them
+		$internals = $this->_database->get_internals();
+
+		# Calculate the spamminess of all tokens
+
+		# Get all tokens we want to rate
+
+		$tokens = $this->_lexer->get_tokens($text);
+
+		# Check if the lexer failed
+		# (if so, $tokens will be a lexer error code, if not, $tokens will be an array)
+		if(!is_array($tokens))
+			return $tokens;
+
+		# Fetch all availible data for the token set from the database
+		$this->_token_data = $this->_database->get(array_keys($tokens));
+
+		# Calculate the spamminess and importance for each token (or a degenerated form of it)
+
+		$word_count = array();
+		$rating     = array();
+		$importance = array();
+
+		foreach($tokens as $word => $count) {
+
+			$word_count[$word] = $count;
+
+			# Although we only call this function only here ... let's do the
+			# calculation stuff in a function to make this a bit less confusing ;-)
+			$rating[$word] = $this->_get_probability($word, $internals['texts_ham'], $internals['texts_spam']);
+
+			$importance[$word] = abs(0.5 - $rating[$word]);
+
+		}
+
+		# Order by importance
+		arsort($importance);
+		reset($importance);
+
+		# Get the most interesting tokens (use all if we have less than the given number)
+
+		$relevant = array();
+
+		for($i = 0; $i < $this->config['use_relevant']; $i++) {
+
+			if($tmp = each($importance)) {
+
+				# Important tokens remain
+
+				# If the token's rating is relevant enough, use it
+
+				if(abs(0.5 - $rating[$tmp['key']]) > $this->config['min_dev']) {
+
+					# Tokens that appear more than once also count more than once
+
+					for($x = 0, $l = $word_count[$tmp['key']]; $x < $l; $x++)
+						array_push($relevant, $rating[$tmp['key']]);
+
+				}
+
+			}
+
+			else {
+				# We have less than words to use, so we already
+				# use what we have and can break here
+				break;
+			}
+
+		}
+
+		# Calculate the spamminess of the text (thanks to Mr. Robinson ;-)
+		# We set both hamminess and Spamminess to 1 for the first multiplying
+		$hamminess  = 1;
+		$spamminess = 1;
+
+		# Consider all relevant ratings
+		foreach($relevant as $value) {
+			$hamminess  *= (1.0 - $value);
+			$spamminess *= $value;
+		}
+
+		# If no token was good for calculation, we really don't know how
+		# to rate this text; so we assume a spam and ham probability of 0.5
+
+		if($hamminess === 1 and $spamminess === 1) {
+			$hamminess = 0.5;
+			$spamminess = 0.5;
+			$n = 1;
+		}
+		else {
+			# Get the number of relevant ratings
+			$n = count($relevant);
+		}
+
+		# Calculate the combined rating
+
+		# The actual hamminess and spamminess
+		$hamminess  = 1 - pow($hamminess,  (1 / $n));
+		$spamminess = 1 - pow($spamminess, (1 / $n));
+
+		# Calculate the combined indicator
+		$probability = ($hamminess - $spamminess) / ($hamminess + $spamminess);
+
+		# We want a value between 0 and 1, not between -1 and +1, so ...
+		$probability = (1 + $probability) / 2;
+
+		# Alea iacta est
+		return $probability;
+
+	}
+
+	/**
+	 * Calculate the spamminess of a single token also considering "degenerated" versions
+	 *
+	 * @access private
+	 * @param string $word
+	 * @param string $texts_ham
+	 * @param string $texts_spam
+	 * @return void
+	 */
+
+	private function _get_probability($word, $texts_ham, $texts_spam)
+	{
+
+		# Let's see what we have!
+
+		if(isset($this->_token_data['tokens'][$word]) === TRUE) {
+			# The token was in the database, so we can use it's data as-is
+			# and calculate the spamminess of this token directly
+			return $this->_calc_probability($this->_token_data['tokens'][$word], $texts_ham, $texts_spam);
+		}
+
+		# Damn. The token was not found, so do we have at least similar words?
+
+		if(isset($this->_token_data['degenerates'][$word]) === TRUE) {
+
+			# We found similar words, so calculate the spamminess for each one
+			# and choose the most important one for the further calculation
+
+			# The default rating is 0.5 simply saying nothing
+			$rating = 0.5;
+
+			foreach($this->_token_data['degenerates'][$word] as $degenerate => $count) {
+
+				# Calculate the rating of the current degenerated token
+				$rating_tmp = $this->_calc_probability($count, $texts_ham, $texts_spam);
+
+				# Is it more important than the rating of another degenerated version?
+				if(abs(0.5 - $rating_tmp) > abs(0.5 - $rating))
+					$rating = $rating_tmp;
+
+			}
+
+			return $rating;
+
+		}
+
+		else {
+			# The token is really unknown, so choose the default rating
+			# for completely unknown tokens. This strips down to the
+			# robX parameter so we can cheap out the freaky math ;-)
+			return $this->config['rob_x'];
+		}
+
+	}
+
+	/**
+	 * Do the actual spamminess calculation of a single token
+	 *
+	 * @access private
+	 * @param array $data
+	 * @param string $texts_ham
+	 * @param string $texts_spam
+	 * @return void
+	 */
+
+	private function _calc_probability($data, $texts_ham, $texts_spam)
+	{
+
+		# Calculate the basic probability by Mr. Graham
+
+		# But: consider the number of ham and spam texts saved instead of the
+		# number of entries where the token appeared to calculate a relative
+		# spamminess because we count tokens appearing multiple times not just
+		# once but as often as they appear in the learned texts
+
+		$rel_ham = $data['count_ham'];
+		$rel_spam = $data['count_spam'];
+
+		if($texts_ham > 0)
+			$rel_ham = $data['count_ham'] / $texts_ham;
+
+		if($texts_spam > 0)
+			$rel_spam = $data['count_spam'] / $texts_spam;
+
+		$rating = $rel_spam / ($rel_ham + $rel_spam);
+
+		# Calculate the better probability proposed by Mr. Robinson
+		$all = $data['count_ham'] + $data['count_spam'];
+		return (($this->config['rob_s'] * $this->config['rob_x']) + ($all * $rating)) / ($this->config['rob_s'] + $all);
+
+	}
+
+	/**
+	 * Check the validity of the category of a request
+	 *
+	 * @access private
+	 * @param string $category
+	 * @return void
+	 */
+
+	private function _check_category($category)
+	{
+		return $category === self::HAM or $category === self::SPAM;
+	}
+
+	/**
+	 * Learn a reference text
+	 *
+	 * @access public
+	 * @param string $text
+	 * @param const $category Either b8::SPAM or b8::HAM
+	 * @return void
+	 */
+
+	public function learn($text, $category)
+	{
+		return $this->_process_text($text, $category, self::LEARN);
+	}
+
+	/**
+	 * Unlearn a reference text
+	 *
+	 * @access public
+	 * @param string $text
+	 * @param const $category Either b8::SPAM or b8::HAM
+	 * @return void
+	 */
+
+	public function unlearn($text, $category)
+	{
+		return $this->_process_text($text, $category, self::UNLEARN);
+	}
+
+	/**
+	 * Does the actual interaction with the storage backend for learning or unlearning texts
+	 *
+	 * @access private
+	 * @param string $text
+	 * @param const $category Either b8::SPAM or b8::HAM
+	 * @param const $action Either b8::LEARN or b8::UNLEARN
+	 * @return void
+	 */
+
+	private function _process_text($text, $category, $action)
+	{
+
+		# Validate the startup
+
+		$started_up = $this->validate();
+
+		if($started_up !== TRUE)
+			return $started_up;
+
+		# Look if the request is okay
+		if($this->_check_category($category) === FALSE)
+			return self::TRAINER_CATEGORY_FAIL;
+
+		# Get all tokens from $text
+
+		$tokens = $this->_lexer->get_tokens($text);
+
+		# Check if the lexer failed
+		# (if so, $tokens will be a lexer error code, if not, $tokens will be an array)
+		if(!is_array($tokens))
+			return $tokens;
+
+		# Pass the tokens and what to do with it to the storage backend
+		return $this->_database->process_text($tokens, $category, $action);
+
+	}
+
+}
+
+?>
\ No newline at end of file
diff --git a/library/spam/b8/degenerator/degenerator_default.php b/library/spam/b8/degenerator/degenerator_default.php
new file mode 100644
index 000000000..4ff6d882b
--- /dev/null
+++ b/library/spam/b8/degenerator/degenerator_default.php
@@ -0,0 +1,127 @@
+<?php
+
+#   Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+#
+#   This file is part of the b8 package
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU Lesser General Public License as published by
+#   the Free Software Foundation in version 2.1 of the License.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+#   License for more details.
+#
+#   You should have received a copy of the GNU Lesser General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+
+/**
+ * Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+ *
+ * @license LGPL
+ * @access public
+ * @package b8
+ * @author Tobias Leupold
+ */
+
+class b8_degenerator_default
+{
+
+	public $degenerates = array();
+
+	/**
+	 * Generates a list of "degenerated" words for a list of words.
+	 *
+	 * @access public
+	 * @param array $tokens
+	 * @return array An array containing an array of degenerated tokens for each token
+	 */
+
+	public function degenerate(array $words)
+	{
+
+		$degenerates = array();
+
+		foreach($words as $word)
+			$degenerates[$word] = $this->_degenerate_word($word);
+
+		return $degenerates;
+
+	}
+
+	/**
+	 * If the original word is not found in the database then
+	 * we build "degenerated" versions of the word to lookup.
+	 *
+	 * @access private
+	 * @param string $word
+	 * @return array An array of degenerated words
+	 */
+
+	protected function _degenerate_word($word)
+	{
+
+		# Check for any stored words so the process doesn't have to repeat
+		if(isset($this->degenerates[$word]) === TRUE)
+			return $this->degenerates[$word];
+
+		$degenerate = array();
+
+		# Add different version of upper and lower case and ucfirst
+		array_push($degenerate, strtolower($word));
+		array_push($degenerate, strtoupper($word));
+		array_push($degenerate, ucfirst($word));
+
+		# Degenerate all versions
+
+		foreach($degenerate as $alt_word) {
+
+			# Look for stuff like !!! and ???
+
+			if(preg_match('/[!?]$/', $alt_word) > 0) {
+
+				# Add versions with different !s and ?s
+
+				if(preg_match('/[!?]{2,}$/', $alt_word) > 0) {
+					$tmp = preg_replace('/([!?])+$/', '$1', $alt_word);
+					array_push($degenerate, $tmp);
+				}
+
+				$tmp = preg_replace('/([!?])+$/', '', $alt_word);
+				array_push($degenerate, $tmp);
+
+			}
+
+			# Look for ... at the end of the word
+
+			$alt_word_int = $alt_word;
+
+			while(preg_match('/[\.]$/', $alt_word_int) > 0) {
+				$alt_word_int = substr($alt_word_int, 0, strlen($alt_word_int) - 1);
+				array_push($degenerate, $alt_word_int);
+			}
+
+		}
+
+		# Some degenerates are the same as the original word. These don't have
+		# to be fetched, so we create a new array with only new tokens
+
+		$real_degenerate = array();
+
+		foreach($degenerate as $deg_word) {
+			if($word != $deg_word)
+				array_push($real_degenerate, $deg_word);
+		}
+
+		# Store the list of degenerates for the token
+		$this->degenerates[$word] = $real_degenerate;
+
+		return $real_degenerate;
+
+	}
+
+}
+
+?>
\ No newline at end of file
diff --git a/library/spam/b8/lexer/lexer_default.php b/library/spam/b8/lexer/lexer_default.php
new file mode 100644
index 000000000..7b5ca22bf
--- /dev/null
+++ b/library/spam/b8/lexer/lexer_default.php
@@ -0,0 +1,205 @@
+<?php
+
+#   Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+#
+#   This file is part of the b8 package
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU Lesser General Public License as published by
+#   the Free Software Foundation in version 2.1 of the License.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+#   License for more details.
+#
+#   You should have received a copy of the GNU Lesser General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+
+/**
+ * Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+ *
+ * @license LGPL
+ * @access public
+ * @package b8
+ * @author Tobias Leupold
+ * @author Oliver Lillie (aka buggedcom) (original PHP 5 port)
+ */
+
+class b8_lexer_default
+{
+
+	const LEXER_TEXT_NOT_STRING = 'LEXER_TEXT_NOT_STRING';
+	const LEXER_TEXT_EMPTY      = 'LEXER_TEXT_EMPTY';
+
+	public $config = NULL;
+
+	# The regular expressions we use to split the text to tokens
+
+	public $regexp = array(
+		'ip'        => '/([A-Za-z0-9\_\-\.]+)/',
+		'raw_split' => '/[\s,\.\/"\:;\|<>\-_\[\]{}\+=\)\(\*\&\^%]+/',
+		'html'      => '/(<.+?>)/',
+		'tagname'   => '/(.+?)\s/',
+		'numbers'   => '/^[0-9]+$/'
+	);
+
+	/**
+	 * Constructs the lexer.
+	 *
+	 * @access public
+	 * @return void
+	 */
+
+	function __construct($config)
+	{
+		$this->config = $config;
+	}
+
+	/**
+	 * Generates the tokens required for the bayesian filter.
+	 *
+	 * @access public
+	 * @param string $text
+	 * @return array Returns the list of tokens
+	 */
+
+	public function get_tokens($text)
+	{
+
+		# Check that we actually have a string ...
+		if(is_string($text) === FALSE)
+			return self::LEXER_TEXT_NOT_STRING;
+
+		# ... and that it's not empty
+		if(empty($text) === TRUE)
+			return self::LEXER_TEXT_EMPTY;
+
+		# Re-convert the text to the original characters coded in UTF-8, as
+		# they have been coded in html entities during the post process
+		$text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');
+
+		$tokens = array();
+
+		# Find URLs and IP addresses
+
+		preg_match_all($this->regexp['ip'], $text, $raw_tokens);
+
+		foreach($raw_tokens[1] as $word) {
+
+			# Check for a dot
+			if(strpos($word, '.') === FALSE)
+				continue;
+
+			# Check that the word is valid, min and max sizes, etc.
+			if($this->_is_valid($word) === FALSE)
+				continue;
+
+			if(isset($tokens[$word]) === FALSE)
+				$tokens[$word] = 1;
+			else
+				$tokens[$word] += 1;
+
+			# Delete the word from the text so it doesn't get re-added.
+			$text = str_replace($word, '', $text);
+
+			# Also process the parts of the URLs
+			$url_parts = preg_split($this->regexp['raw_split'], $word);
+
+			foreach($url_parts as $word) {
+
+				# Again validate the part
+
+				if($this->_is_valid($word) === FALSE)
+					continue;
+
+				if(isset($tokens[$word]) === FALSE)
+					$tokens[$word] = 1;
+				else
+					$tokens[$word] += 1;
+
+			}
+
+		}
+
+		# Split the remaining text
+
+		$raw_tokens = preg_split($this->regexp['raw_split'], $text);
+
+		foreach($raw_tokens as $word) {
+
+			# Again validate the part
+
+			if($this->_is_valid($word) === FALSE)
+				continue;
+
+			if(isset($tokens[$word]) === FALSE)
+				$tokens[$word] = 1;
+			else
+				$tokens[$word] += 1;
+
+		}
+
+		# Process the HTML
+
+		preg_match_all($this->regexp['html'], $text, $raw_tokens);
+
+		foreach($raw_tokens[1] as $word) {
+
+			# Again validate the part
+
+			if($this->_is_valid($word) === FALSE)
+				continue;
+
+			# If the tag has parameters, just use the tag itself
+
+			if(strpos($word, ' ') !== FALSE) {
+				preg_match($this->regexp['tagname'], $word, $tmp);
+				$word = "{$tmp[1]}...>";
+			}
+
+			if(isset($tokens[$word]) === FALSE)
+				$tokens[$word] = 1;
+			else
+				$tokens[$word] += 1;
+
+		}
+
+		# Return a list of all found tokens
+		return $tokens;
+
+	}
+
+	/**
+	 * Validates a token.
+	 *
+	 * @access private
+	 * @param string $token The token string.
+	 * @return boolean Returns TRUE if the token is valid, otherwise returns FALSE
+	 */
+
+	private function _is_valid($token)
+	{
+
+		# Validate the size of the token
+
+		$len = strlen($token);
+
+		if($len < $this->config['min_size'] or $len > $this->config['max_size'])
+			return FALSE;
+
+		# We may want to exclude pure numbers
+		if($this->config['allow_numbers'] === FALSE) {
+			if(preg_match($this->regexp['numbers'], $token) > 0)
+				return FALSE;
+		}
+
+		# Token is okay
+		return TRUE;
+
+	}
+
+}
+
+?>
\ No newline at end of file
diff --git a/library/spam/b8/storage/storage_base.php b/library/spam/b8/storage/storage_base.php
new file mode 100644
index 000000000..01f5a69d7
--- /dev/null
+++ b/library/spam/b8/storage/storage_base.php
@@ -0,0 +1,395 @@
+<?php
+
+#   Copyright (C) 2010 Tobias Leupold <tobias.leupold@web.de>
+#
+#   This file is part of the b8 package
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU Lesser General Public License as published by
+#   the Free Software Foundation in version 2.1 of the License.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+#   License for more details.
+#
+#   You should have received a copy of the GNU Lesser General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+
+/**
+ * Functions used by all storage backends
+ * Copyright (C) 2010 Tobias Leupold <tobias.leupold@web.de>
+ *
+ * @license LGPL
+ * @access public
+ * @package b8
+ * @author Tobias Leupold
+ */
+
+abstract class b8_storage_base
+{
+
+	public $connected            = FALSE;
+
+	protected $_degenerator      = NULL;
+
+	const INTERNALS_TEXTS_HAM    = 'bayes*texts.ham';
+	const INTERNALS_TEXTS_SPAM   = 'bayes*texts.spam';
+	const INTERNALS_DBVERSION    = 'bayes*dbversion';
+
+	const BACKEND_NOT_CONNECTED  = 'BACKEND_NOT_CONNECTED';
+	const DATABASE_WRONG_VERSION = 'DATABASE_WRONG_VERSION';
+	const DATABASE_NOT_B8        = 'DATABASE_NOT_B8';
+
+	/**
+	 * Validates the class has all it needs to work.
+	 *
+	 * @access protected
+	 * @return mixed Returns TRUE if everything is okay, otherwise an error code.
+	 */
+
+	protected function validate()
+	{
+
+		# We set up the degenerator here, as we would have to duplicate code if it
+		# was done in the constructor of the respective storage backend.
+		$class = 'b8_degenerator_' . $this->b8_config['degenerator'];
+		$this->_degenerator = new $class();
+
+		if($this->connected !== TRUE)
+			return self::BACKEND_NOT_CONNECTED;
+
+		return TRUE;
+
+	}
+
+	/**
+	 * Checks if a b8 database is used and if it's version is okay
+	 *
+	 * @access protected
+	 * @return mixed Returns TRUE if everything is okay, otherwise an error code.
+	 */
+
+	protected function check_database()
+	{
+
+		$internals = $this->get_internals();
+
+		if(isset($internals['dbversion'])) {
+			if($internals['dbversion'] == "2") {
+				return TRUE;
+			}
+			else {
+				$this->connected = FALSE;
+				return self::DATABASE_WRONG_VERSION;
+			}
+		}
+		else {
+			$this->connected = FALSE;
+			return self::DATABASE_NOT_B8;
+		}
+
+	}
+
+	/**
+	 * Parses the "count" data of a token.
+	 *
+	 * @access private
+	 * @param string $data
+	 * @return array Returns an array of the parsed data: array(count_ham, count_spam, lastseen).
+	 */
+
+	private function _parse_count($data)
+	{
+
+		list($count_ham, $count_spam, $lastseen) = explode(' ', $data);
+
+		$count_ham  = (int) $count_ham;
+		$count_spam = (int) $count_spam;
+
+		return array(
+			'count_ham'  => $count_ham,
+			'count_spam' => $count_spam
+		);
+
+	}
+
+	/**
+	 * Get the database's internal variables.
+	 *
+	 * @access public
+	 * @return array Returns an array of all internals.
+	 */
+
+	public function get_internals()
+	{
+
+		$internals = $this->_get_query(
+			array(
+				self::INTERNALS_TEXTS_HAM,
+				self::INTERNALS_TEXTS_SPAM,
+				self::INTERNALS_DBVERSION
+			)
+		);
+
+		return array(
+			'texts_ham'  => (int) $internals[self::INTERNALS_TEXTS_HAM],
+			'texts_spam' => (int) $internals[self::INTERNALS_TEXTS_SPAM],
+			'dbversion'  => (int) $internals[self::INTERNALS_DBVERSION]
+		);
+
+	}
+
+	/**
+	 * Get all data about a list of tags from the database.
+	 *
+	 * @access public
+	 * @param array $tokens
+	 * @return mixed Returns FALSE on failure, otherwise returns array of returned data in the format array('tokens' => array(token => count), 'degenerates' => array(token => array(degenerate => count))).
+	 */
+
+	public function get($tokens)
+	{
+
+		# Validate the startup
+
+		$started_up = $this->validate();
+
+		if($started_up !== TRUE)
+			return $started_up;
+
+		# First we see what we have in the database.
+		$token_data = $this->_get_query($tokens);
+
+		# Check if we have to degenerate some tokens
+
+		$missing_tokens = array();
+
+		foreach($tokens as $token) {
+			if(!isset($token_data[$token]))
+				$missing_tokens[] = $token;
+		}
+
+		if(count($missing_tokens) > 0) {
+
+			# We have to degenerate some tokens
+			$degenerates_list = array();
+
+			# Generate a list of degenerated tokens for the missing tokens ...
+			$degenerates = $this->_degenerator->degenerate($missing_tokens);
+
+			# ... and look them up
+
+			foreach($degenerates as $token => $token_degenerates)
+				$degenerates_list = array_merge($degenerates_list, $token_degenerates);
+
+			$token_data = array_merge($token_data, $this->_get_query($degenerates_list));
+
+		}
+
+		# Here, we have all availible data in $token_data.
+
+		$return_data_tokens = array();
+		$return_data_degenerates = array();
+
+		foreach($tokens as $token) {
+
+			if(isset($token_data[$token]) === TRUE) {
+
+				# The token was found in the database
+
+				# Add the data ...
+				$return_data_tokens[$token] = $this->_parse_count($token_data[$token]);
+
+				# ... and update it's lastseen parameter
+				$this->_update($token, "{$return_data_tokens[$token]['count_ham']} {$return_data_tokens[$token]['count_spam']} " . $this->b8_config['today']);
+
+			}
+
+			else {
+
+				# The token was not found, so we look if we
+				# can return data for degenerated tokens
+
+				# Check all degenerated forms of the token
+
+				foreach($this->_degenerator->degenerates[$token] as $degenerate) {
+
+					if(isset($token_data[$degenerate]) === TRUE) {
+
+						# A degeneration of the token way found in the database
+
+						# Add the data ...
+						$return_data_degenerates[$token][$degenerate] = $this->_parse_count($token_data[$degenerate]);
+
+						# ... and update it's lastseen parameter
+						$this->_update($degenerate, "{$return_data_degenerates[$token][$degenerate]['count_ham']} {$return_data_degenerates[$token][$degenerate]['count_spam']} " . $this->b8_config['today']);
+
+					}
+
+				}
+
+			}
+
+		}
+
+		# Now, all token data directly found in the database is in $return_data_tokens
+		# and all data for degenerated versions is in $return_data_degenerates
+
+		# First, we commit the changes to the lastseen parameters
+		$this->_commit();
+
+		# Then, we return what we have
+		return array(
+			'tokens'      => $return_data_tokens,
+			'degenerates' => $return_data_degenerates
+		);
+
+	}
+
+	/**
+	 * Stores or deletes a list of tokens from the given category.
+	 *
+	 * @access public
+	 * @param array $tokens
+	 * @param const $category Either b8::HAM or b8::SPAM
+	 * @param const $action Either b8::LEARN or b8::UNLEARN
+	 * @return void
+	 */
+
+	public function process_text($tokens, $category, $action)
+	{
+
+		# Validate the startup
+
+		$started_up = $this->validate();
+
+		if($started_up !== TRUE)
+			return $started_up;
+
+		# No matter what we do, we first have to check what data we have.
+
+		# First get the internals, including the ham texts and spam texts counter
+		$internals = $this->get_internals();
+
+		# Then, fetch all data for all tokens we have (and update their lastseen parameters)
+		$token_data = $this->_get_query(array_keys($tokens));
+
+		# Process all tokens to learn/unlearn
+
+		foreach($tokens as $token => $count) {
+
+			if(isset($token_data[$token])) {
+
+				# We already have this token, so update it's data
+
+				# Get the existing data
+				list($count_ham, $count_spam, $lastseen) = explode(' ', $token_data[$token]);
+				$count_ham  = (int) $count_ham;
+				$count_spam = (int) $count_spam;
+
+				# Increase or decrease the right counter
+
+				if($action === b8::LEARN) {
+					if($category === b8::HAM)
+						$count_ham += $count;
+					elseif($category === b8::SPAM)
+						$count_spam += $count;
+				}
+
+				elseif($action == b8::UNLEARN) {
+					if($category === b8::HAM)
+						$count_ham -= $count;
+					elseif($category === b8::SPAM)
+						$count_spam -= $count;
+				}
+
+				# We don't want to have negative values
+
+				if($count_ham < 0)
+					$count_ham = 0;
+
+				if($count_spam < 0)
+					$count_spam = 0;
+
+				# Now let's see if we have to update or delete the token
+				if($count_ham !== 0 or $count_spam !== 0)
+					$this->_update($token, "$count_ham $count_spam " . $this->b8_config['today']);
+				else
+					$this->_del($token);
+
+			}
+
+			else {
+
+				# We don't have the token. If we unlearn a text, we can't delete it
+				# as we don't have it anyway, so just do something if we learn a text
+
+				if($action === b8::LEARN) {
+
+					if($category === b8::HAM)
+						$data = '1 0 ';
+					elseif($category === b8::SPAM)
+						$data = '0 1 ';
+
+					$data .= $this->b8_config['today'];
+
+					$this->_put($token, $data);
+
+				}
+
+			}
+
+		}
+
+		# Now, all token have been processed, so let's update the right text
+
+		if($action === b8::LEARN) {
+
+			if($category === b8::HAM) {
+				$internals['texts_ham']++;
+				$this->_update(self::INTERNALS_TEXTS_HAM, $internals['texts_ham']);
+			}
+
+			elseif($category === b8::SPAM) {
+				$internals['texts_spam']++;
+				$this->_update(self::INTERNALS_TEXTS_SPAM, $internals['texts_spam']);
+			}
+
+		}
+
+		elseif($action == b8::UNLEARN) {
+
+			if($category === b8::HAM) {
+
+				$internals['texts_ham']--;
+
+				if($internals['texts_ham'] < 0)
+					$internals['texts_ham'] = 0;
+
+				$this->_update(self::INTERNALS_TEXTS_HAM, $internals['texts_ham']);
+
+			}
+
+			elseif($category === b8::SPAM) {
+
+				$internals['texts_spam']--;
+
+				if($internals['texts_spam'] < 0)
+					$internals['texts_spam'] = 0;
+
+				$this->_update(self::INTERNALS_TEXTS_SPAM, $internals['texts_spam']);
+
+			}
+
+		}
+
+		# We're done and can commit all changes to the database now
+		$this->_commit();
+
+	}
+
+}
+
+?>
\ No newline at end of file
diff --git a/library/spam/b8/storage/storage_dba.php b/library/spam/b8/storage/storage_dba.php
new file mode 100644
index 000000000..04618b23e
--- /dev/null
+++ b/library/spam/b8/storage/storage_dba.php
@@ -0,0 +1,198 @@
+<?php
+
+#   Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+#
+#   This file is part of the b8 package
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU Lesser General Public License as published by
+#   the Free Software Foundation in version 2.1 of the License.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+#   License for more details.
+#
+#   You should have received a copy of the GNU Lesser General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+
+/**
+ * The DBA (Berkeley DB) abstraction layer for communicating with the database.
+ * Copyright (C) 2006-2010 Tobias Leupold <tobias.leupold@web.de>
+ *
+ * @license LGPL
+ * @access public
+ * @package b8
+ * @author Tobias Leupold
+ */
+
+class b8_storage_dba extends b8_storage_base
+{
+
+	public $config = array(
+		'database'    => 'wordlist.db',
+		'handler'     => 'db4',
+	);
+
+	public $b8_config = array(
+		'degenerator' => NULL,
+		'today'       => NULL
+	);
+
+	private $_db          = NULL;
+
+	const DATABASE_CONNECTION_FAIL = 'DATABASE_CONNECTION_FAIL';
+
+	/**
+	 * Constructs the database layer.
+	 *
+	 * @access public
+	 * @param string $config
+	 */
+
+	function __construct($config, $degenerator, $today)
+	{
+
+		# Pass some variables of the main b8 config to this class
+		$this->b8_config['degenerator'] = $degenerator;
+		$this->b8_config['today']       = $today;
+
+		# Validate the config items
+		if(count($config) > 0) {
+			foreach ($config as $name => $value) {
+				$this->config[$name] = (string) $value;
+			}
+		}
+
+	}
+
+	/**
+	 * Closes the database connection.
+	 *
+	 * @access public
+	 * @return void
+	 */
+
+	function __destruct()
+	{
+		if($this->_db !== NULL) {
+			dba_close($this->_db);
+			$this->connected = FALSE;
+		}
+	}
+
+	/**
+	 * Connect to the database and do some checks.
+	 *
+	 * @access public
+	 * @return mixed Returns TRUE on a successful database connection, otherwise returns a constant from b8.
+	 */
+
+	public function connect()
+	{
+
+		# Have we already connected?
+		if($this->_db !== NULL)
+			return TRUE;
+
+		# Open the database connection
+		$this->_db = dba_open(dirname(__FILE__) . DIRECTORY_SEPARATOR . ".." . DIRECTORY_SEPARATOR . $this->config['database'], "w", $this->config['handler']);
+
+		if($this->_db === FALSE) {
+			$this->connected = FALSE;
+			$this->_db = NULL;
+			return self::DATABASE_CONNECTION_FAIL;
+		}
+
+		# Everything is okay and connected
+
+		$this->connected = TRUE;
+
+		# Let's see if this is a b8 database and the version is okay
+		return $this->check_database();
+
+	}
+
+	/**
+	 * Does the actual interaction with the database when fetching data.
+	 *
+	 * @access protected
+	 * @param array $tokens
+	 * @return mixed Returns an array of the returned data in the format array(token => data) or an empty array if there was no data.
+	 */
+
+	protected function _get_query($tokens)
+	{
+
+		$data = array();
+
+		foreach ($tokens as $token) {
+
+			$count = dba_fetch($token, $this->_db);
+
+			if($count !== FALSE)
+				$data[$token] = $count;
+
+		}
+
+		return $data;
+
+	}
+
+	/**
+	 * Store a token to the database.
+	 *
+	 * @access protected
+	 * @param string $token
+	 * @param string $count
+	 * @return bool TRUE on success or FALSE on failure
+	 */
+
+	protected function _put($token, $count) {
+		return dba_insert($token, $count, $this->_db);
+	}
+
+	/**
+	 * Update an existing token.
+	 *
+	 * @access protected
+	 * @param string $token
+	 * @param string $count
+	 * @return bool TRUE on success or FALSE on failure
+	 */
+
+	protected function _update($token, $count)
+	{
+		return dba_replace($token, $count, $this->_db);
+	}
+
+	/**
+	 * Remove a token from the database.
+	 *
+	 * @access protected
+	 * @param string $token
+	 * @return bool TRUE on success or FALSE on failure
+	 */
+
+	protected function _del($token)
+	{
+		return dba_delete($token, $this->_db);
+	}
+
+	/**
+	 * Does nothing :-D
+	 *
+	 * @access protected
+	 * @return void
+	 */
+
+	protected function _commit()
+	{
+		# We just need this function because the (My)SQL backend(s) need it.
+		return;
+	}
+
+}
+
+?>
\ No newline at end of file
diff --git a/library/spam/b8/storage/storage_mysql.php b/library/spam/b8/storage/storage_mysql.php
new file mode 100644
index 000000000..022536350
--- /dev/null
+++ b/library/spam/b8/storage/storage_mysql.php
@@ -0,0 +1,351 @@
+<?php
+
+#   Copyright (C) 2006-2011 Tobias Leupold <tobias.leupold@web.de>
+#
+#   This file is part of the b8 package
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU Lesser General Public License as published by
+#   the Free Software Foundation in version 2.1 of the License.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+#   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+#   License for more details.
+#
+#   You should have received a copy of the GNU Lesser General Public License
+#   along with this program; if not, write to the Free Software Foundation,
+#   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+
+/**
+ * The MySQL abstraction layer for communicating with the database.
+ * Copyright (C) 2009 Oliver Lillie (aka buggedcom)
+ * Copyright (C) 2010-2011 Tobias Leupold <tobias.leupold@web.de>
+ *
+ * @license LGPL
+ * @access public
+ * @package b8
+ * @author Oliver Lillie (aka buggedcom) (original PHP 5 port and optimizations)
+ * @author Tobias Leupold
+ */
+
+class b8_storage_mysql extends b8_storage_base
+{
+
+	public $config = array(
+		'database'        => 'b8_wordlist',
+		'table_name'      => 'b8_wordlist',
+		'host'            => 'localhost',
+		'user'            => FALSE,
+		'pass'            => FALSE,
+		'connection'      => NULL
+	);
+
+	public $b8_config = array(
+		'degenerator'     => NULL,
+		'today'           => NULL
+	);
+
+	private $_connection                   = NULL;
+	private $_deletes                      = array();
+	private $_puts                         = array();
+	private $_updates                      = array();
+
+	const DATABASE_CONNECTION_FAIL         = 'DATABASE_CONNECTION_FAIL';
+	const DATABASE_CONNECTION_ERROR        = 'DATABASE_CONNECTION_ERROR';
+	const DATABASE_CONNECTION_BAD_RESOURCE = 'DATABASE_CONNECTION_BAD_RESOURCE';
+	const DATABASE_SELECT_ERROR            = 'DATABASE_SELECT_ERROR';
+	const DATABASE_TABLE_ACCESS_FAIL       = 'DATABASE_TABLE_ACCESS_FAIL';
+	const DATABASE_WRONG_VERSION           = 'DATABASE_WRONG_VERSION';
+
+	/**
+	 * Constructs the database layer.
+	 *
+	 * @access public
+	 * @param string $config
+	 */
+
+	function __construct($config, $degenerator, $today)
+	{
+
+		# Pass some variables of the main b8 config to this class
+		$this->b8_config['degenerator'] = $degenerator;
+		$this->b8_config['today']       = $today;
+
+		# Validate the config items
+
+		if(count($config) > 0) {
+
+			foreach ($config as $name => $value) {
+
+				switch($name) {
+
+					case 'table_name':
+					case 'host':
+					case 'user':
+					case 'pass':
+					case 'database':
+						$this->config[$name] = (string) $value;
+						break;
+
+					case 'connection':
+
+						if($value !== NULL) {
+
+							if(is_resource($value) === TRUE) {
+								$resource_type = get_resource_type($value);
+								$this->config['connection'] = $resource_type !== 'mysql link' && $resource_type !== 'mysql link persistent' ? FALSE : $value;
+							}
+
+							else
+								$this->config['connection'] = FALSE;
+
+						}
+
+						break;
+
+				}
+
+			}
+
+		}
+
+	}
+
+	/**
+	 * Closes the database connection.
+	 *
+	 * @access public
+	 * @return void
+	 */
+
+	function __destruct()
+	{
+
+		if($this->_connection === NULL)
+			return;
+
+		# Commit any changes before closing
+		$this->_commit();
+
+		# Just close the connection if no link-resource was passed and b8 created it's own connection
+		if($this->config['connection'] === NULL)
+			mysql_close($this->_connection);
+
+		$this->connected = FALSE;
+
+	}
+
+	/**
+	 * Connect to the database and do some checks.
+	 *
+	 * @access public
+	 * @return mixed Returns TRUE on a successful database connection, otherwise returns a constant from b8.
+	 */
+
+	public function connect()
+	{
+
+		# Are we already connected?
+		if($this->connected === TRUE)
+			return TRUE;
+
+		# Are we using an existing passed resource?
+		if($this->config['connection'] === FALSE) {
+			# ... yes we are, but the connection is not a resource, so return an error
+			$this->connected = FALSE;
+			return self::DATABASE_CONNECTION_BAD_RESOURCE;
+		}
+
+		elseif($this->config['connection'] === NULL) {
+
+			# ... no we aren't so we have to connect.
+
+			if($this->_connection = mysql_connect($this->config['host'], $this->config['user'], $this->config['pass'])) {
+				if(mysql_select_db($this->config['database'], $this->_connection) === FALSE) {
+					$this->connected = FALSE;
+					return self::DATABASE_SELECT_ERROR . ": " . mysql_error();
+				}
+			}
+			else {
+				$this->connected = FALSE;
+				return self::DATABASE_CONNECTION_ERROR;
+			}
+
+		}
+
+		else {
+			# ... yes we are
+			$this->_connection = $this->config['connection'];
+		}
+
+		# Just in case ...
+		if($this->_connection === NULL) {
+			$this->connected = FALSE;
+			return self::DATABASE_CONNECTION_FAIL;
+		}
+
+		# Check to see if the wordlist table exists
+		if(mysql_query('DESCRIBE ' . $this->config['table_name'], $this->_connection) === FALSE) {
+			$this->connected = FALSE;
+			return self::DATABASE_TABLE_ACCESS_FAIL . ": " . mysql_error();
+		}
+
+		# Everything is okay and connected
+		$this->connected = TRUE;
+
+		# Let's see if this is a b8 database and the version is okay
+		return $this->check_database();
+
+	}
+
+	/**
+	 * Does the actual interaction with the database when fetching data.
+	 *
+	 * @access protected
+	 * @param array $tokens
+	 * @return mixed Returns an array of the returned data in the format array(token => data) or an empty array if there was no data.
+	 */
+
+	protected function _get_query($tokens)
+	{
+
+		# Construct the query ...
+
+		if(count($tokens) > 0) {
+
+			$where = array();
+
+			foreach ($tokens as $token) {
+				$token = mysql_real_escape_string($token, $this->_connection);
+				array_push($where, $token);
+			}
+
+			$where = 'token IN ("' . implode('", "', $where) . '")';
+		}
+
+		else {
+			$token = mysql_real_escape_string($token, $this->_connection);
+			$where = 'token = "' . $token . '"';
+		}
+
+		# ... and fetch the data
+
+		$result = mysql_query('
+			SELECT token, count
+			FROM ' . $this->config['table_name'] . '
+			WHERE ' . $where . ';
+		', $this->_connection);
+
+		$data = array();
+
+		while ($row = mysql_fetch_array($result, MYSQL_ASSOC))
+			$data[$row['token']] = $row['count'];
+
+		mysql_free_result($result);
+
+		return $data;
+
+	}
+
+	/**
+	 * Store a token to the database.
+	 *
+	 * @access protected
+	 * @param string $token
+	 * @param string $count
+	 * @return void
+	 */
+
+	protected function _put($token, $count) {
+		$token = mysql_real_escape_string($token, $this->_connection);
+		$count = mysql_real_escape_string($count, $this->_connection);;
+		array_push($this->_puts, '("' . $token . '", "' . $count . '")');
+	}
+
+	/**
+	 * Update an existing token.
+	 *
+	 * @access protected
+	 * @param string $token
+	 * @param string $count
+	 * @return void
+	 */
+
+	protected function _update($token, $count)
+	{
+		$token = mysql_real_escape_string($token, $this->_connection);
+		$count = mysql_real_escape_string($count, $this->_connection);
+		array_push($this->_updates, '("' . $token . '", "' . $count . '")');
+	}
+
+	/**
+	 * Remove a token from the database.
+	 *
+	 * @access protected
+	 * @param string $token
+	 * @return void
+	 */
+
+	protected function _del($token)
+	{
+		$token = mysql_real_escape_string($token, $this->_connection);
+		array_push($this->_deletes, $token);
+	}
+
+	/**
+	 * Commits any modification queries.
+	 *
+	 * @access protected
+	 * @return void
+	 */
+
+	protected function _commit()
+	{
+
+		if(count($this->_deletes) > 0) {
+
+			$result = mysql_query('
+				DELETE FROM ' . $this->config['table_name'] . '
+				WHERE token IN ("' . implode('", "', $this->_deletes) . '");
+			', $this->_connection);
+
+			if(is_resource($result) === TRUE)
+				mysql_free_result($result);
+
+			$this->_deletes = array();
+
+		}
+
+		if(count($this->_puts) > 0) {
+
+			$result = mysql_query('
+				INSERT INTO ' . $this->config['table_name'] . '(token, count)
+				VALUES ' . implode(', ', $this->_puts) . ';', $this->_connection);
+
+			if(is_resource($result) === TRUE)
+				mysql_free_result($result);
+
+			$this->_puts = array();
+
+		}
+
+		if(count($this->_updates) > 0) {
+
+			$result = mysql_query('
+				INSERT INTO ' . $this->config['table_name'] . '(token, count)
+				VALUES ' . implode(', ', $this->_updates) . '
+				ON DUPLICATE KEY UPDATE ' . $this->config['table_name'] . '.count = VALUES(count);', $this->_connection);
+
+			if(is_resource($result) === TRUE)
+				mysql_free_result($result);
+
+			$this->_updates = array();
+
+		}
+
+	}
+
+}
+
+?>
\ No newline at end of file