3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = 'https://www.youtube.com/watch?v=UiyDmqO59QE'; if (preg_match('/(youtu\.be\/|youtube\.com\/(watch\?(.*&)?v=|(embed|v)\/))([^\?&"\'>]+)/', $str, $matches)) { var_dump( trim($matches[5]) ); }
based on appM6
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(11) "UiyDmqO59QE"