3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [1 => [4,3,2]]; $arr1 = [2 => [5,3,9]]; $arr = $arr1; print_r($arr);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Array ( [2] => Array ( [0] => 5 [1] => 3 [2] => 9 ) )
preferences:
74.54 ms | 402 KiB | 61 Q