Watch duration of a Youtube video?

Question

How is it possible to view the time of a video through the id of the video?

With some research I found how to see the title but I could not find the duration.

    $content = file_get_contents("http://youtube.com/get_video_info?video_id=".$id_vid);
    parse_str($content, $ytarr);
    $titulo_v = $ytarr['title'];

With the above code shown, I can see the title of the video but how do I do with the duration? It is possible in the same way?

Answer 1

Within the variable $ytarr has the index length_seconds that brings the duration of the video in seconds:

$seconds = $ytarr['length_seconds'];