library/HTMLPurifier/Filter/YouTube.php

   1 <?php
   2
   3 class HTMLPurifier_Filter_YouTube extends HTMLPurifier_Filter
   4 {
   5
   6     public $name = 'YouTube';
   7
   8     public function preFilter($html, $config, $context) {
   9         $pre_regex = '#<object[^>]+>.+?'.
  10             'http://www.youtube.com/v/([A-Za-z0-9\-_]+).+?</object>#s';
  11         $pre_replace = '<span class="youtube-embed">\1</span>';
  12         return preg_replace($pre_regex, $pre_replace, $html);
  13     }
  14
  15     public function postFilter($html, $config, $context) {
  16         $post_regex = '#<span class="youtube-embed">([A-Za-z0-9\-_]+)</span>#';
  17         $post_replace = '<object width="425" height="350" '.
  18             'data="http://www.youtube.com/v/\1">'.
  19             '<param name="movie" value="http://www.youtube.com/v/\1"></param>'.
  20             '<param name="wmode" value="transparent"></param>'.
  21             '<!--[if IE]>'.
  22             '<embed src="http://www.youtube.com/v/\1"'.
  23             'type="application/x-shockwave-flash"'.
  24             'wmode="transparent" width="425" height="350" />'.
  25             '<![endif]-->'.
  26             '</object>';
  27         return preg_replace($post_regex, $post_replace, $html);
  28     }
  29
  30 }
  31
  32 // vim: et sw=4 sts=4