Uzun isimli linklerin adını kısaltmak

<?php
function shortenurl($url){
$length = strlen($url);
if($length > 45){
$length = $length - 30;
$first = substr($url, 0, -$length);
$last = substr($url, -15);
$newurl = $first."...".$last;
return $newurl;
}else{
return $url;
}

}$longurl = "http://siteismi/search?hl=en&client=firefox-a&channel=s&rls=org.mozilla%3Aen-US%3Aofficial&hs=BCR&q=metacafe&btnG=Search";

$shorturl = shortenurl($longurl);

echo"<a href="$longurl">$shorturl</a>";

?>