3v4l.org

run code in 200+ PHP versions simultaneously
<?php $relate_to = [11,22]; $before = NULL; $relate_to_before = explode(',', $before); sort($relate_to_before); $relate_to_new = array_diff($relate_to, $relate_to_before); var_dump($relate_to_new);
based on 3mLOt
Output for 5.4.0 - 7.4.0rc2
array(2) { [0]=> int(11) [1]=> int(22) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/PYiTX on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/PYiTX on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PYiTX on line 3
Process exited with code 255.