3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $matches = null; preg_match('/^(d{1,2}([a-z]+))(?:s*)S+ (?=200[0-9])/', '21st March 2006', $matches); var_dump($matches);
Output for 4.3.0 - 7.2.0
array(0) { }