Youtube API get video duration from the XML

问题

Consider Youtube API XML files like http://gdata.youtube.com/feeds/api/videos/$id One particular XML data file is http://gdata.youtube.com/feeds/api/videos/GI6CfKcMhjY The following function gets the title of the video according to the XML url:

function ytTitle($ytid,$ytURLConstant){
    $url = $ytURLConstant.$ytid;
    $doc = new DOMDocument;
    $doc->load($url);
    echo $title = $doc->getElementsByTagName("title")->item(0)->nodeValue;
}

As I see there is video duration in the XML file:

<media:title type='plain'>Jack Sparrow (feat. Michael Bolton)</media:title><yt:duration seconds='197'/>

As I am an XML newbie any help concerning getting the video duration will be greatly appreciated.

回答1:

I had a similar problem with Youtube API and I find this very helpful site

http://viewsboard.com/boards/view/discussion/2/263

来源：https://stackoverflow.com/questions/7378116/youtube-api-get-video-duration-from-the-xml