Get duration from a youtube url

Question

Im looking for a function that will pull the youtube duration of a video from the url. I read some tutorials but don\'t get it. I embed videos on my site using a url and I have

Answer 1

function getYoutubeDuration($videoid) {
      $xml = simplexml_load_file('https://gdata.youtube.com/feeds/api/videos/' . $videoid . '?v=2');
      $result = $xml->xpath('//yt:duration[@seconds]');
      $total_seconds = (int) $result[0]->attributes()->seconds;

      return $total_seconds;
}

//now call this pretty function. 
//As parameter I gave a video id to my function and bam!
echo getYoutubeDuration("y5nKxHn4yVA");