Código PHP:
function _GetVideoIdFromUrl($url) {
$parts = explode('?v=',$url);
if (count($parts) == 2) {
$tmp = explode('&',$parts[1]);
if (count($tmp)>1) {
return $tmp[0];
} else {
return $parts[1];
}
} else {
return $url;
}
}