Online PHP editor | refs for aUaYl

<?php function check_link($link) { if(preg_match('#v=\K[a-z\d-]+|v/\K[^&?"]+|v=\K[^&"]+|youtu\.be/\K[^&"]+#', $link, $r)) { echo $r[0]."\n"; $pattern = '#<a\s?href="(https?://(?:www\.)?[^"]+)">\1</a>#i'; return preg_replace($pattern,'<iframe width="560" height="315" src="https://www.youtube.com/embed/'.$r[0].'" frameborder="0"></iframe>',$link); } } echo check_link('<a href="https://www.youtube.com/watch?v=Z7Oc8QaM5VU">https://www.youtube.com/watch?v=Z7Oc8QaM5VU</a>');