3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $matches=array(); preg_match('/^\([0-9]{3}\)-?[0-9]{4}/',"7654389",$matches); var_dump($matches);
based on RiO8m
Output for 4.3.0 - 7.2.0
array(0) { }