Searching a multidimensional array for objects
===

I have a multidimensional array in PHP and want to be able to search through it and find all values that are objects.

The reason I want to do this is so that when an object is found I can replace it with an array by calling an `output()` method on it. The `output()` method uses `get_object_vars()` to turn itself into an array, which it then returns.

Here's an example which achieves what I want manually (but only with 2 levels of depth):

    // First level search...
    foreach($array as $k => $v) {

        // Check if it's an array.
        if (is_array($v)) {

            // Second level search...
            foreach($v as $k2 => $v2) {

                // If it's an object - convert it!
                if (is_object($v2)) {
                    $array[$k][$k2] = $array[$k][$k2]->output();
                }

            }

        }

        // If it's an object - convert it!
        if (is_object($v)) {
            $array[$k] = $array[$k]->output();
        }

    }