Multidimensional Associative Array Sorting in PHP

I needed to sort a deep multidimensional associative array for PlanterApp, so I looked around for some solutions. The one I found was close enough to the right answer that I was able to make it work by defining a function, then referring to that function as follows:

function sortMyTools( $i, $j ) { // function sort the Tools array by [Tool][name]
    $a = $i['Tool']['name'];
    $b = $j['Tool']['name'];
    if ($a == $b) return 0;
        elseif ($a > $b) return 1;
        else return -1;
    }
    uasort($tools, sortMyTools ); // uasort() using the function

Since the enormous $tools array has many levels, this cool code provides a great answer to sorting on the tool name element quite nicely.
Credits to:
http://stackoverflow.com/users/468793/kapa
re: http://stackoverflow.com/questions/7983822/sort-a-multi-dimensional-associative-array

Note: uasort — Sort an array with a user-defined comparison function and maintain index association