- preg_replace: documentation ( source)
<?php
function getYouTubeId($yturl) {
$pattern = '~(?:http|https|)(?::\/\/|)(?:www.|)(?:youtu\.be\/|youtube\.com(?:\/embed\/|\/v\/|\/watch\?v=|\/ytscreeningroom\?v=|\/feeds\/api\/videos\/|\/user\S*[^\w\-\s]|\S*[^\w\-\s]))([\w\-]{11})[a-z0-9;:@?&%=+\/\$_.-]*~i';
return (preg_replace($pattern, '$1', $yturl));
}
echo getYouTubeId("http://www.youtube.com/watch?v=OWjR8C8bKhQ");