File indexing completed on 2024-12-22 05:36:18 

0001 <?php
0002 
0003 /**
0004  * Validates based on {ident} CSS grammar production
0005  */
0006 class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef
0007 {
0008 
0009     /**
0010      * @param string $string
0011      * @param HTMLPurifier_Config $config
0012      * @param HTMLPurifier_Context $context
0013      * @return bool|string
0014      */
0015     public function validate($string, $config, $context)
0016     {
0017         $string = trim($string);
0018 
0019         // early abort: '' and '0' (strings that convert to false) are invalid
0020         if (!$string) {
0021             return false;
0022         }
0023 
0024         $pattern = '/^(-?[A-Za-z_][A-Za-z_\-0-9]*)$/';
0025         if (!preg_match($pattern, $string)) {
0026             return false;
0027         }
0028         return $string;
0029     }
0030 }
0031 
0032 // vim: et sw=4 sts=4