function removeURLsToOtherDomains(&$links, &$actual_url)
 {
     $url_parts_actual = phpcrawlerutils::splitURL($actual_url);
     @reset($links);
     while (list($x) = @each($links)) {
         $url_parts_link = phpcrawlerutils::splitURL($links[$x]["url_rebuild"]);
         if ($url_parts_link["domain"] != $url_parts_actual["domain"]) {
             $links[$x] = "";
         }
     }
 }