3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('a' => 1, 'b' => array()); $b = array('c' => 2); array_keys(array_diff_assoc($a,$b));
based on YdWpc
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Output for hhvm-3.10.0

Process exited with code 153.