Вывод каринки-превью для видео с youtube и др. видеохостингов

<?php
if(!defined('DATALIFEENGINE')){die("Hacking attempt!");}

    if (preg_match("/<iframe.*?src=\"([^\"]+)\".*?><\/iframe>/i", $data, $matches)) {
        $url = $matches[1];
    }
    if (preg_match("/<object.*?>.*?<param name=\"movie\" value=\"([^\"]+)\"( \/>|><\/param>).*?<\/object>/i", $data, $matches)) {
        $url = $matches[1];
    }


    if (!is_string($url) || empty($url)) echo "Неверный url";
    $url = str_replace("&amp;", "&", $url);
    $arr = parse_url($url);
    $arr[host] = str_replace('www.', '', $arr[host]);
    $url = "";
    switch ($arr[host]) {
        case 'rutube.ru':
            if (preg_match("/\/tracks\/(.+)\.html/i", $arr[path], $matches)) {
                $xml = simplexml_load_file("http://rutube.ru/cgi-bin/xmlapi.cgi?rt_mode=movie&rt_movie_id=".$matches[1]."&utf=1");
                if ($xml) {
                    $url = (string) $xml->response->movie->thumbnailLink;
                }
            }
            break;
        case 'video.rutube.ru':
            if (preg_match("/\/(.+)/i", $arr[path], $matches)) {
                $s[0] = substr($arr[path], 1, 2);
                $s[1] = substr($arr[path], 3, 2);
                $url = "http://tub.rutube.ru/thumbs/".$s[0]."/".$s[1]."/".$matches[1]."-1-1.jpg";
            }
            //$url = "http://img-1.rutube.ru/thumbs/".$link[0].$link[1]."/".$link[2].$link[3]."/".$link."-2.jpg";
            break;
        case 'youtube.com':
            if (preg_match("/\/(embed|v)\/(.+)\/?/i", $arr[path], $matches)) {
                $url = "http://img.youtube.com/vi/".$matches[2]."/0.jpg";
            }
            break;
        case 'player.vimeo.com':
            if (preg_match("/\/video\/(.+)\/?/i", $arr[path], $matches)) {
                $clip_id = $matches[1];
            }
            $xml = simplexml_load_file('http://vimeo.com/api/v2/video/'.$clip_id.'.xml');
            if ($xml) {
                $url = (string) $xml->video->thumbnail_medium;
            }
            break;
        case 'vimeo.com':
            parse_str($arr[query], $query);
            $clip_id = $query['clip_id'];
            $xml = simplexml_load_file('http://vimeo.com/api/v2/video/'.$clip_id.'.xml');
            if ($xml) {
                $url = (string) $xml->video->thumbnail_medium;
            }
            break;
        default:
            $url = "";
            break;
    }
    echo "<img src='$url' />";
?>