3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 'work', 'homework', 'home', 'sky', 'door' ]; $keep = ['work', 'home']; $lookup = array_combine($keep, $keep); foreach ($array as &$v) { $v = $lookup[$v] ?? 0; } var_export($array);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array ( 0 => 'work', 1 => 0, 2 => 'home', 3 => 0, 4 => 0, )
preferences:
89.26 ms | 402 KiB | 123 Q