3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $subject = "#>nga.LEFT_KEY"; echo preg_match('/^#([\!,\<,\>,\=,\%])?([a-z,_]*[\.]?)?([A-Z,_]+)$/', $subject);
Output for 4.3.0 - 7.1.0
1