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33 lines
724 B
33 lines
724 B
11 months ago
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<?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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