3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4); $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8); var_dump(array_diff_key(asort($array1), sort($array2))); ?>
Output for 5.1.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: array_diff_key(): Argument #1 is not an array in /in/fL7Am on line 5 NULL
Output for hhvm-3.10.0 - 3.12.0
Warning: array_diff_key() expects parameter 1 to be an array or collection in /in/fL7Am on line 5 NULL
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_diff_key() in /in/fL7Am 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/fL7Am 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/fL7Am 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/fL7Am on line 5