3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = [1 => 19, 2 => 2, 3 => 2018]; $arr2 = [1 => 19, 2 => 1, 3 => 2017]; $arr3 = [1 => 18, 2 => 2, 3 => 2016]; $mynewArray = [$arr1,$arr2,$arr3]; print_r($mynewArray);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
Array ( [0] => Array ( [1] => 19 [2] => 2 [3] => 2018 ) [1] => Array ( [1] => 19 [2] => 1 [3] => 2017 ) [2] => Array ( [1] => 18 [2] => 2 [3] => 2016 ) )
preferences:
141.55 ms | 408 KiB | 5 Q