3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arr = [ 0 => [1, 2, 3, 4], 1 => ['one', 'two', 'three', 'four'] ]; $res = []; foreach ($arr as $item){ foreach($item as $i){ $res = [$i, $item]; } } print_r($res);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
Array ( [0] => four [1] => Array ( [0] => one [1] => two [2] => three [3] => four ) )
preferences:
83.39 ms | 1481 KiB | 4 Q