PHP Regex to get youtube video ID

getYoutubeID.php

/*
    Matches:

    youtube.com/v/vidid
    youtube.com/vi/vidid
    youtube.com/?v=vidid
    youtube.com/?vi=vidid
    youtube.com/watch?v=vidid
    youtube.com/watch?vi=vidid
    youtu.be/vidid
    youtube.com/embed/vidid
    http://youtube.com/v/vidid
    http://www.youtube.com/v/vidid
    https://www.youtube.com/v/vidid
    youtube.com/watch?v=vidid&wtv=wtv
    http://www.youtube.com/watch?dev=inprogress&v=vidid&feature=related
    https://m.youtube.com/watch?v=vidid
*/


preg_match("/^(?:http(?:s)?:\/\/)?(?:www\.)?(?:m\.)?(?:youtu\.be\/|youtube\.com\/(?:(?:watch)?\?(?:.*&)?v(?:i)?=|(?:embed|v|vi|user)\/))([^\?&\"'>]+)/", $url, $matches);