library/HTMLPurifier/AttrDef/CSS/Ident.php

   1 <?php
   2
   3 /**
   4  * Validates based on {ident} CSS grammar production
   5  */
   6 class HTMLPurifier_AttrDef_CSS_Ident extends HTMLPurifier_AttrDef
   7 {
   8
   9     public function validate($string, $config, $context) {
  10
  11         $string = trim($string);
  12
  13         // early abort: '' and '0' (strings that convert to false) are invalid
  14         if (!$string) return false;
  15
  16         $pattern = '/^(-?[A-Za-z_][A-Za-z_\-0-9]*)$/';
  17         if (!preg_match($pattern, $string)) return false;
  18         return $string;
  19
  20     }
  21
  22 }
  23
  24 // vim: et sw=4 sts=4