3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $required = array("a" => true, 'b'=>true); $seen = array("a"=>true, "ab" => true, "c"=>true); $result = array_diff_key($required, $seen); print_r($result);
based on Om2Te
Output for 5.1.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [b] => 1 )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_diff_key() in /in/7t3Vs on line 5
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_diff_key() in /in/7t3Vs on line 5
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: array_diff_key() in /in/7t3Vs on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_diff_key() in /in/7t3Vs on line 5