php array into multidimensional array keys

Question

How do I turn this:

  $keys=array(1,8,27);

Into this?

    $array=array();
    $array[1][8][27]='Hooray!';

I have an array that I need as the keys of a multidimensional array. In the example:
I am using 1, 8 and 27.

Answer 1

I think this would work:

$array[$keys[0]][$keys[1]][$keys[2]] = "Hooray!";

Can't even begin to imagine how to go about making it dynamic though.