PHP Function for Short URLs

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



<?php

$longurl= "http://www.google.co.id/search?q=detik&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a";
$shorturl = shorturl($longurl);
echo "<a href=\"$longurl\">$shorturl</a>";

?>