3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [1, 2, 3, 4]; print_r(array_map(fn(int $i): int => $i * $i, $arr));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Array ( [0] => 1 [1] => 4 [2] => 9 [3] => 16 )
preferences:
52.01 ms | 406 KiB | 5 Q