Q:

Rewriting an Array keys after sorting it

$arr1 = [1, 2, 3, 8];
$arr2 = [1, 2, 4, 9, 10];
$arr3 = [1, 2, 5, 11, 12];
$arrs = [$arr1, $arr2, $arr3];
arsort($arrs);

I have sorted the $arrs to change it to $arr3, $arr2, $arr1, My problem is that it kept its Array Key as it is, I want to rewrite these keys by its new order, so instead of
[2]$arr3 [1]$arr2 [0]$arr1

it becomes
[0]$arr3 [1]$arr2 [2]$arr1

I thought about explode()ing then implode()ing the array again But it didn't work because it is a MDArray like the following $arrs = implode(explode($arrs)); after arsort().
What is the best and shortest way to re[write][make] the array keys?

A:

Just simply use array_values;
$arr1 = [1, 2, 3, 8];
$arr2 = [1, 2, 4, 9, 10];
$arr3 = [1, 2, 5, 11, 12];
$arrs = [$arr1, $arr2, $arr3];
arsort($arrs);

$arrs  = array_values($arrs);

This will reset the keys based on the order.

