/*
 * Function to parse the id from all different types of Youtube Embed Codes and Youtube Urls
 *
 * @author Andreas Grundner
 * @date 22.07.2011
 * @licence freeware
 * @param string youtube url, embed code, share code, channel code ...
 * @return string youtube_id
 */
function getYoutubeId($sYoutubeUrl) {
 
    # set to zero
    $youtube_id = "";
    $sYoutubeUrl = trim($sYoutubeUrl);
 
    # the User entered only the eleven chars long id, Case 1
    if(strlen($sYoutubeUrl) === 11) {
        $youtube_id = $sYoutubeUrl;
        return $sYoutubeUrl;
    }
 
    # the User entered a Url
    else {
 
        # try to get all Cases
        if (preg_match('~(?:youtube\.com/(?:user/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/ ]{11})~i', $sYoutubeUrl, $match)) {
            $youtube_id = $match[1];
            return $youtube_id;
        }
        # try to get some other channel codes, and fallback extractor
        elseif(preg_match('~http://www.youtube.com/v/([A-Za-z0-9\-_]+).+?|embed\/([0-9A-Za-z-_]{11})|watch\?v\=([0-9A-Za-z-_]{11})|#.*/([0-9A-Za-z-_]{11})~si', $sYoutubeUrl, $match)) {
 
            for ($i=1; $i<=4; $i++) {
                if (strlen($match[$i])==11) {
                    $youtube_id = $match[$i];
                    break;
                }
            }
            return $youtube_id;
        }
        else {
            $youtube_id = "No valid YoutubeId extracted";
            return $youtube_id;
        }
    }
}

$youtubeid = getYoutubeId($content);//'!http:\/\/w{0,3}\.youtube[^\' \'\n\r"]+!';
				//preg_match_all($erg, $content, $mtc, PREG_PATTERN_ORDER);
				if ($youtubeid != "No valid YoutubeId extracted")
				{
					$target_src = "http://img.youtube.com/vi/".$youtubeid."/0.jpg";
					$tmp_file = sprintf('./files/cache/tmp/%d', md5(rand(111111,999999).$this->document_srl));
					if(!is_dir('./files/cache/tmp')) FileHandler::makeDir('./files/cache/tmp');
					FileHandler::getRemoteFile($target_src, $tmp_file);
					if(file_exists($tmp_file))
					{
						list($_w, $_h, $_t, $_a) = @getimagesize($tmp_file);
						if($_w>=$width && $_h>=$height)
						{
							$source_file = $tmp_file;
							$is_tmp_file = true;
						}
					}
				}

 if(!$this->get('uploaded_count') && !preg_match("!<img!is", $this->get('content')) && !preg_match("!<iframe!is", $this->get('content'))) return;

 if(!$this->get('uploaded_count') && !preg_match("!<img!is", $this->get('content')) && !preg_match("!<iframe!is", $this->get('content')) && !preg_match("!<embed!is", $this->get('content'))) return;