3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1, 2, 3, 4, 5); $b = array(2,4,6); var_dump(array_diff($b, $a)); var_dump(array_diff($a, $b));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [2]=> int(6) } array(3) { [0]=> int(1) [2]=> int(3) [4]=> int(5) }

preferences:
321.87 ms | 406 KiB | 457 Q