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32 lines
724 B
32 lines
724 B
<?php |
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/** |
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* Validates based on {ident} CSS grammar production |
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*/ |
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class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef |
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{ |
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/** |
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* @param string $string |
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* @param HTMLPurifier_Config $config |
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* @param HTMLPurifier_Context $context |
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* @return bool|string |
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*/ |
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public function validate($string, $config, $context) |
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{ |
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$string = trim($string); |
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// early abort: '' and '0' (strings that convert to false) are invalid |
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if (!$string) { |
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return false; |
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} |
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$pattern = '/^(-?[A-Za-z_][A-Za-z_\-0-9]*)$/'; |
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if (!preg_match($pattern, $string)) { |
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return false; |
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} |
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return $string; |
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} |
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} |
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// vim: et sw=4 sts=4
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