3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $usernameSearch = ''; if (false === (bool)!preg_match('/[^a-z_\-0-9]/i', $usernameSearch) || strlen($usernameSearch) > 14) { echo 'false'; } else { echo 'true'; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
true