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: 

if (array_key_exists($arr, 'dim1Key'))  
  if (array_key_exists($arr['dim1Key'], 'dim2Key'))  
    if (array_key_exists($arr['dim1Key']['dim2Key'], 'dim3Key'))  
      echo "cell exists";

But is there a simpler way?

I'll go into more details about this:

  1. Can I perform this check in one single statement?
  2. Do I have to use array_key_exist or can I use something like isset? When do I use each and why?
php multidimensional-array
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