mirror of
https://github.com/ezyang/htmlpurifier.git
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43 lines
1.3 KiB
PHP
43 lines
1.3 KiB
PHP
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<?php
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require_once 'HTMLPurifier/AttrDef.php';
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require_once 'HTMLPurifier/Config.php';
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class HTMLPurifier_AttrDef_Class extends HTMLPurifier_AttrDef
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{
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function validate($raw_string, $config = null) {
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if (!$config) $config = HTMLPurifier_Config::createDefault();
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$string = trim($raw_string);
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// early abort: '' and '0' (strings that convert to false) are invalid
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if (!$string) return false;
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// OPTIMIZABLE!
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// do the preg_match, capture all subpatterns for reformulation
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// we don't support U+00A1 and up codepoints or
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// escaping because I don't know how to do that with regexps
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// and plus it would complicate optimization efforts (you never
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// see that anyway).
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$matches = array();
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$pattern = '/(?:\s|\A)'.
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'((?:-?[A-Za-z_]|--)[A-Za-z_\-0-9]*)'.
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'(?:\s|\z)/';
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preg_match_all($pattern, $string, $matches);
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$new_string = '';
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foreach ($matches[1] as $class_names) {
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$new_string .= $class_names . ' ';
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}
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$new_string = rtrim($new_string);
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return ($new_string == $raw_string) ? true : $new_string ? $new_string : false;
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}
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}
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?>
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