3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array_merge([1,2], [3,4]); sort($array); var_dump($array);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.22, 8.1.0 - 8.1.9
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) }

preferences:
21.65 ms | 409 KiB | 5 Q