3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a1 = [1,2,3,4,5]; $a2 = [1,3,5]; $result = []; foreach($a1 as $item) { if (in_array($item, $a2)) { $result[] = 'match' . $item; } else { $result[] = $item; } } print_r($result);
Output for 5.6.38 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Array ( [0] => match1 [1] => 2 [2] => match3 [3] => 4 [4] => match5 )
preferences:
31.17 ms | 1137 KiB | 7 Q