3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1= array('a' => "XL"); $arr2= array('a' => "XLd",'b'=>"CDW"); $arr2 = array_replace(array_map(function($n){return "";}, $arr2), $arr1); print_r($arr2);
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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
Array ( [a] => XL [b] => )
preferences:
125.81 ms | 408 KiB | 5 Q