Update a multidimentional array from key of other

Question

I have a result array like this:

$result = Array
(
    [1] => Array
        (
            [0] => some value
            [1] => some value
            [2] => some value
        )
    [4] => Array
        (
            [0] => some value
            [1] => some value
            [6] => Array
                (
                    [0] => some value
                    [8] => Array
                        (
                            [0] => some value
                        )
                )
        )
)

and I have a second array

$test = Array
(
    [4] => Array
        (
           [6] => Array
               (
                  [8] => Array
                      (
                         [0] = value to add
                      )
                )
        )
)

How can I update the $result array on base of keys from $test array without losing any key index. The main point is $result can have any structure and is dynamically generated but the $test array will always have keys index(s) which will somewhat match the $result array. The general PHP array combine merge and other functions don't provide desired results.

[Edit] The point is my second array $test will decide the position of $result where the data will be added/merged.

Answer 1

Did you try using: http://php.net/manual/en/function.array-merge-recursive.php

By add do you mean append or addition(sum)?? This should work for appending the data.