3v4l.org

run code in 500+ PHP versions simultaneously
<?php $array = [1, 2, 3]; foreach ($array as &$val) $val--; $val = 0; foreach ($array as $item) $val += $item; print_r([$array, $val]);
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Array ( [0] => Array ( [0] => 0 [1] => 1 [2] => 2 ) [1] => 2 )
preferences:
98.56 ms | 1585 KiB | 4 Q