recursive array_diff doesn't find deleted items

Question

I try to implement a recursive array_diff, but I sill do not find a 100% working function.

I have two arrays:

Array
(
    [11] => Array
        (
            [id] => 24077
            [a] => 11
        )

    [22] => Array
        (
            [id] => 24078
            [a] => 22
        )

)

Array
(
    [11] => Array
        (
            [id] => 24077
            [a] => 11
        )

    [22] => Array
        (
            [id] => 24078
            [a] => 22
        )

    [27] => Array
        (
            [id] => 24080
            [a] => 27
        )

)

I tested both Function mentioned here: recursive array_diff()?

I call the functions via:

$diff = arrayRecursiveDiff($array1, $array2);
$diff = array_diff_recursive($array1, $array2);

I always get an empty array back. There's one element deleted in the first array, so I expect a result that shows me that one element is missing (maybe an array item with empty content?).

If I change the arrays in the function call:

$diff = arrayRecursiveDiff($array2, $array1);
$diff = array_diff_recursive($array2, $array1);

I'll get the new one [27]... but I need the way described above.

Do you have any ideas? How would you try to find a way to solve this problem?