3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = preg_match('#^https://www.youtube.com/watch?v=(.*)#','https://www.youtube.com/watch?v=Ex9huC9uUg8&feature=youtube_gdata', $matches); var_dump($matches);
Output for 4.3.0 - 7.1.0
array(0) { }