3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(1 => 'a', 2 => 'b', 3 => 'c'); $b = array_flip(array(1, 2)); print_r(array_diff_key($a, $b));
Output for 5.1.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [3] => c )
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/3rRhU on line 4
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_diff_key() in /in/3rRhU on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: array_diff_key() in /in/3rRhU on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_diff_key() in /in/3rRhU on line 4