<?php
             function urlDondur($metin)
{
    $url = '/(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/';
    return preg_replace($url, '<a href="$0" target="_blank" title="$0">$0</a>', $metin);
} ?>