Strip all but variable in URL

[charltondurie]

I am building a component where users enter a Youtube URL and press save. I need to run some code on the form field where the URL was entered to strip all but the unique identifier. i.e. something like this:

$url = 'http://www.youtube.com/watch?v=_VaAlaIJ384&feature=rec-LGOUT-real_rev-rn-4r-10-HM';
strip all befor (including) 'v='
strip all after (including) '&'

 

Can anyone suggest how I would do this?

[kenrbnsn]

You can do it the brute force method with two explodes:

<?php
$url = 'http://www.youtube.com/watch?v=_VaAlaIJ384&feature=rec-LGOUT-real_rev-rn-4r-10-HM';
list($part1,$part2) = explode('&',$url);
list($dmy,$v) = explode('=',$part1);
echo $v;
?>

or by using parse_url and parse_str

<?php
$url = 'http://www.youtube.com/watch?v=_VaAlaIJ384&feature=rec-LGOUT-real_rev-rn-4r-10-HM';
$query_str = parse_url($url,PHP_URL_QUERY);
parse_str($query_str,$params);
echo $params['v'];
?>

 

Ken