library/HTMLPurifier/URIFilter/DisableExternal.php

   1 <?php
   2
   3 class HTMLPurifier_URIFilter_DisableExternal extends HTMLPurifier_URIFilter
   4 {
   5     public $name = 'DisableExternal';
   6     protected $ourHostParts = false;
   7     public function prepare($config) {
   8         $our_host = $config->getDefinition('URI')->host;
   9         if ($our_host !== null) $this->ourHostParts = array_reverse(explode('.', $our_host));
  10     }
  11     public function filter(&$uri, $config, $context) {
  12         if (is_null($uri->host)) return true;
  13         if ($this->ourHostParts === false) return false;
  14         $host_parts = array_reverse(explode('.', $uri->host));
  15         foreach ($this->ourHostParts as $i => $x) {
  16             if (!isset($host_parts[$i])) return false;
  17             if ($host_parts[$i] != $this->ourHostParts[$i]) return false;
  18         }
  19         return true;
  20     }
  21 }
  22
  23 // vim: et sw=4 sts=4