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<?php 
require ('keyhighlighter.class.php');
 require ('creferrer.class.php');
 
 function my_highlighter ($matches) {
 return '<span style="font-weight: bolder; color: #FF0000;">' . $matches[0] . '</span>';
 }
 
 $url = isset ($_SERVER['HTTP_REFERRER']) ? $_SERVER['HTTP_REFERRER'] : '';
 $creferrer = new CReferrer ();
 $keywords = $creferrer->getKeywords ($url);
 if ($keywords !== false) {
 new keyhighlighter ($keywords, false, 'my_highlighter');
 }
 readfile ('http://www.w3c.org/');
 ?>
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