3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a['p'] = null; $a['c'] = false; echo isset($a['p']); echo " __ "; echo array_key_exists('p',$a); echo " ___ "; echo isset($a['c']);
Output for 4.3.0 - 7.1.0
__ 1 ___ 1