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<?php /** * Implements special behavior for class attribute (normally NMTOKENS) */ class HTMLPurifier_AttrDef_HTML_Class extends HTMLPurifier_AttrDef_HTML_Nmtokens { /** * @param string $string * @param HTMLPurifier_Config $config * @param HTMLPurifier_Context $context * @return bool|string */ protected function split($string, $config, $context) { // really, this twiddle should be lazy loaded $name = $config->getDefinition('HTML')->doctype->name; if ($name == "XHTML 1.1" || $name == "XHTML 2.0") { return parent::split($string, $config, $context); } else { return preg_split('/\s+/', $string); } } /** * @param array $tokens * @param HTMLPurifier_Config $config * @param HTMLPurifier_Context $context * @return array */ protected function filter($tokens, $config, $context) { $allowed = $config->get('Attr.AllowedClasses'); $forbidden = $config->get('Attr.ForbiddenClasses'); $ret = array(); foreach ($tokens as $token) { if (($allowed === null || isset($allowed[$token])) && !isset($forbidden[$token]) && // We need this O(n) check because of PHP's array // implementation that casts -0 to 0. !in_array($token, $ret, true) ) { $ret[] = $token; } } return $ret; } }