unable to download youtube video using phptube class

Question

i m using phptube class for downloading you tube video.

from this site

In code i paste youtube url on a input box but there is errors below.

Warning: file_get_contents(http://www.youtube.com/get_video?video_id=&t=)
[function.file-get-contents]: failed to open stream: HTTP request failed! 
HTTP/1.0 404 Not Found

and

Warning: file_put_contents(./flvs/3Hx9VsqMUug.flv) [function.file-put-contents]:
failed to open stream: No such file or directory in E:\xampp\htdocs\vdo\utube
\functions.php on line 19
path:./flvs/3Hx9VsqMUug.flv

please tell me where is problem???

UPDATE:

here is main code

$url = "http://www.youtube.com/watch?v=".$video_id;
            //where $video_id=nlZJ7RsyC0g
    $this->req =& new HTTP_Request($url);
    //echo "<pre>";
    //print_r($this->req);
    //echo "</pre>";
    //die;
    $response = $this->req->sendRequest();
    //echo $response; die;
    if (PEAR::isError($response)) {
        //echo "inside if";
        $response->getMessage()."\n";
    } else {    
        //echo "inside else";
        $page = $this->req->getResponseBody();  
        //print_r($page);
        //var_dump($page);
        //die;
        preg_match("/video_id=(\w*)/",$page,$mv);

        $v_id = $mv[1]; 

        preg_match("/&t=([\w]*)&/",$page,$tickets);
        $ticket = $tickets[1];

        $curl = "";
        $curl .= $v_id;
        $curl .= "&t=";
        $curl .= $ticket;
        //echo $curl;
        $url = "http://www.youtube.com/get_video?video_id=".$curl;
        echo $url;
        die;
        if ($this->debug)
        return $url;    

output($url) is http://www.youtube.com/get_video?video_id=nlZJ7RsyC0g&t=

here $t is null , how do get $ticket from youtube url

Answer 1

Your second error is because you don't have a directory called /flvs/. Create that in the same directory as your executing script and you'll be golden.

As for your first error, it sounds like YouTube could be blocking your server. Try setting a user agent before making the request:

ini_set('user_agent', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9');

(I found that snippet online in lieu of taking the time to write my own. Just saying.)

Also, it doesn't look like you're passing any parameters (?video_id=&t=). Either the phptube plugin you're using is jacked or you're not passing in correct values. What is your input?

Hope this helps!