<?php /** * Performs safe variable parsing based on types which can be used by * users. This may not be able to represent all possible data inputs, * however. */ class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser { /** * @param mixed $var * @param int $type * @param bool $allow_null * @return array|bool|float|int|mixed|null|string * @throws HTMLPurifier_VarParserException */ protected function parseImplementation($var, $type, $allow_null) { if ($allow_null && $var === null) { return null; } switch ($type) { // Note: if code "breaks" from the switch, it triggers a generic // exception to be thrown. Specific errors can be specifically // done here. case self::MIXED: case self::ISTRING: case self::STRING: case self::TEXT: case self::ITEXT: return $var; case self::INT: if (is_string($var) && ctype_digit($var)) { $var = (int)$var; } return $var; case self::FLOAT: if ((is_string($var) && is_numeric($var)) || is_int($var)) { $var = (float)$var; } return $var; case self::BOOL: if (is_int($var) && ($var === 0 || $var === 1)) { $var = (bool)$var; } elseif (is_string($var)) { if ($var == 'on' || $var == 'true' || $var == '1') { $var = true; } elseif ($var == 'off' || $var == 'false' || $var == '0') { $var = false; } else { throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type"); } } return $var; case self::ALIST: case self::HASH: case self::LOOKUP: if (is_string($var)) { // special case: technically, this is an array with // a single empty string item, but having an empty // array is more intuitive if ($var == '') { return array(); } if (strpos($var, "\n") === false && strpos($var, "\r") === false) { // simplistic string to array method that only works // for simple lists of tag names or alphanumeric characters $var = explode(',', $var); } else { $var = preg_split('/(,|[\n\r]+)/', $var); } // remove spaces foreach ($var as $i => $j) { $var[$i] = trim($j); } if ($type === self::HASH) { // key:value,key2:value2 $nvar = array(); foreach ($var as $keypair) { $c = explode(':', $keypair, 2); if (!isset($c[1])) { continue; } $nvar[trim($c[0])] = trim($c[1]); } $var = $nvar; } } if (!is_array($var)) { break; } $keys = array_keys($var); if ($keys === array_keys($keys)) { if ($type == self::ALIST) { return $var; } elseif ($type == self::LOOKUP) { $new = array(); foreach ($var as $key) { $new[$key] = true; } return $new; } else { break; } } if ($type === self::ALIST) { trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING); return array_values($var); } if ($type === self::LOOKUP) { foreach ($var as $key => $value) { if ($value !== true) { trigger_error( "Lookup array has non-true value at key '$key'; " . "maybe your input array was not indexed numerically", E_USER_WARNING ); } $var[$key] = true; } } return $var; default: $this->errorInconsistent(__CLASS__, $type); } $this->errorGeneric($var, $type); } } // vim: et sw=4 sts=4