3v4l.org

run code in 300+ 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 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [0] => Array ( [0] => 0 [1] => 1 [2] => 2 ) [1] => 2 )
preferences:
136.53 ms | 407 KiB | 5 Q