şu adreste şöyle bişey buldum ama denemedim:
css-tricks.comfunction txt2link($text){
// force http: on www.
$text = ereg_replace( "www\.", "
www.", $text );
// eliminate duplicates after force
$text = ereg_replace( "
http://www\.", "
www.", $text );
$text = ereg_replace( "
http://www\.", "
www.", $text );
// The Regular Expression filter
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
// Check if there is a url in the text
if(preg_match($reg_exUrl, $text, $url)) {
// make the urls hyper links
$text = preg_replace($reg_exUrl, '<a href="'.$url[0].'" rel="nofollow">'.$url[0].'</a>', $text);
} // if no urls in the text just return the text
return ($text);
}