PHP Need to recursively reverse an array

Question

I need to recursively reverse a HUGE array that has many levels of sub arrays, and I need to preserve all of the keys (which some are int keys, and some are string keys), can so

Answer 1

Recursively:

output:

Array
(
    [0] => 1
    [1] => 3
    [2] => 5
    [3] => 7
    [4] => 9
)
Array
(
    [0] => 9
    [1] => 7
    [2] => 5
    [3] => 3
    [4] => 1
)