3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = ['one', '3', '5']; array_walk($data, function($val){ return $val."WOOHOO"; }); var_dump($data);
Output for 5.6.0 - 5.6.27, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array(3) { [0]=> string(3) "one" [1]=> string(1) "3" [2]=> string(1) "5" }
preferences:
158.56 ms | 404 KiB | 191 Q