3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arrayOld = [1, 2, 3, 4, 5]; $arrayNew = [1, 4, 5, 6, 7]; $n = array_diff($arrayOld, $arrayNew); print_r($n);
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.16, 8.4.1 - 8.4.3
Array ( [1] => 2 [2] => 3 )
preferences:
100.39 ms | 408 KiB | 5 Q