Untitled

PHP preg_replace shortening a string
$text = preg_replace("/(s)http://([S]+?)(s)/i" ,
"$1[url="http://$2"]http://$2[/url]$3" , " $text ");

$text = preg_replace("/(s)http://([S]{,40})([S]*?)(s)/i",
"$1[url="http://$2$3"]http://$2[/url]$4" , " $text ");

function replace_links($matches) {

    $url = $matches[2];
    $short_url = preg_replace('~^([^/]*)/(.{14})(.{3,})(.{18})$~', '$1/$2...$4', $url);

    return $matches[1] . '[url="http://' . $url . '"]http://' . $short_url . '[/url]' . $matches[3];

}

$text = preg_replace_callback("/(s)http://([S]+?)(s)/i", 'replace_links', " $text ");