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run code in 150+ php & hhvm versions
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<?php $required = array("a" => true, 'b'=>true); $seen = array("a"=>true, "b" => true, "c"=>true); $result = array_diff_key($required, $seen); print_r($result);
based on T4fpK
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( )
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_diff_key() in /in/Om2Te 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/Om2Te 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/Om2Te 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/Om2Te on line 5