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   1  <?php
   2  
   3  /**
   4   * Pre-transform that changes proprietary background attribute to CSS.
   5   */
   6  class HTMLPurifier_AttrTransform_Background extends HTMLPurifier_AttrTransform {
   7  
   8      public function transform($attr, $config, $context) {
   9  
  10          if (!isset($attr['background'])) return $attr;
  11  
  12          $background = $this->confiscateAttr($attr, 'background');
  13          // some validation should happen here
  14  
  15          $this->prependCSS($attr, "background-image:url($background);");
  16  
  17          return $attr;
  18  
  19      }
  20  
  21  }
  22  
  23  // vim: et sw=4 sts=4