PHP: testing for existence of a cell in a multidimensional array

Question

I have an array with numerous dimensions, and I want to test for the existence of a cell.

The below cascaded approach, will be for sure a safe way to do it:

Answer 1

If you want to check $arr['dim1Key']['dim2Key']['dim3Key'], to be safe you need to check if all arrays exist before dim3Key. Then you can use array_key_exists.

So yes, there is a simpler way using one single if statement like the following:

if (isset($arr['dim1Key']['dim2Key']) &&
    array_key_exists('dim3Key', $arr['dim1Key']['dim2Key'])) ...