Laravel helpers:


Arr::collapse()


The Arr::collapse method collapses an array of arrays into a single array:

use Illuminate\Support\Arr;
 
$array = Arr::collapse([[1, 2, 3], [4, 5, 6], [7, 8, 9]]);
 
// [1, 2, 3, 4, 5, 6, 7, 8, 9]