3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a' => null); print_r(isset($a['a'])); print_r(array_key_exists('a', $a));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1