3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a' => null); var_dump(isset($a['a'])); var_dump(array_key_exists('a', $a));
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(false) bool(true)
Output for hhvm-3.10.0

Process exited with code 153.