File indexing completed on 2024-12-22 05:36:19

 <?php
 
 // must be called POST validation
 
 /**
  * Adds rel="noreferrer" to any links which target a different window
  * than the current one.  This is used to prevent malicious websites
  * from silently replacing the original window, which could be used
  * to do phishing.
  * This transform is controlled by %HTML.TargetNoreferrer.
  */
 class HTMLPurifier_AttrTransform_TargetNoreferrer extends HTMLPurifier_AttrTransform
 {
     /**
      * @param array $attr
      * @param HTMLPurifier_Config $config
      * @param HTMLPurifier_Context $context
      * @return array
      */
     public function transform($attr, $config, $context)
     {
         if (isset($attr['rel'])) {
             $rels = explode(' ', $attr['rel']);
         } else {
             $rels = array();
         }
         if (isset($attr['target']) && !in_array('noreferrer', $rels)) {
             $rels[] = 'noreferrer';
         }
         if (!empty($rels) || isset($attr['rel'])) {
             $attr['rel'] = implode(' ', $rels);
         }
 
         return $attr;
     }
 }