3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = "(hello(world)) program"; preg_match_all('/[(]|[((]+[A-Z]+[)]|[))]/i', $str, $matches); print_r($matches);
Output for 4.3.0 - 7.2.0
Array ( [0] => Array ( [0] => ( [1] => ( [2] => ) [3] => ) ) )