Method to get thumbnail from url for Youtube/Vimeo

gistfile1.php

<?php

private function video_thumbnail_url($url)
{
	if(!filter_var($url, FILTER_VALIDATE_URL)){
	    // URL is Not valid
	    return false;
	}
	$domain=parse_url($url,PHP_URL_HOST);
	$url_dec=parse_url($url);
	if($domain=='www.youtube.com' OR $domain=='youtube.com')
	{
	    if($querystring=parse_url($url,PHP_URL_QUERY))
	    {  
	        parse_str($querystring);
	        if(!empty($v)) return "http://img.youtube.com/vi/$v/0.jpg";
	        else return false;
	    }
	    else return false;
	}
	elseif($domain == 'youtu.be')
	{
	    $v= str_replace('/','', parse_url($url, PHP_URL_PATH));
	    return (empty($v)) ? false : "http://img.youtube.com/vi/$v/0.jpg" ;
	}
	else if($domain == 'www.vimeo.com' || $domain == 'vimeo.com'){
		$hash = unserialize(file_get_contents("http://vimeo.com/api/v2/video/".substr($url_dec['path'], 1).".php"));
		return $hash[0]["thumbnail_large"]; 
	}
	 
	else return false;
}

?>