3v4l.org

run code in 300+ PHP versions simultaneously
<?php $my_array = ['a','b','c']; $dyn_array = [1, 2, 3]; $num = 2; $result = array_reduce( array_fill(0, $num, $dyn_array), function($carry, $item) { return array_merge($carry, $item); }, $my_array ); print_r($result);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [0] => a [1] => b [2] => c [3] => 1 [4] => 2 [5] => 3 [6] => 1 [7] => 2 [8] => 3 )
preferences:
116.68 ms | 1970 KiB | 4 Q