$update_options['order']['delivery']['no_delivery'] = $defaultOptions['order']['delivery']['no_delivery'];
}
/*add delivery charges per item if it does not exist yet (as wppizza_merge_options -> wppizza_traverse_list only looks for first dimansion in array. should maybe be made recursive one day though.....)*/
if (!isset($options['order']['delivery']['per_item'])) {
    $update_options['order']['delivery']['per_item'] = $defaultOptions['order']['delivery']['per_item'];
}
if (!isset($options['order']['delivery']['minimum_total']['deliverycharges_below_total'])) {
    $update_options['order']['delivery']['minimum_total']['deliverycharges_below_total'] = $defaultOptions['order']['delivery']['minimum_total']['deliverycharges_below_total'];
}
/****************************************************************************
	$update_options now holds the old options plus the added new defaults options
	*****************************************************************************/
/**********************************************
		[now lets remove obsolete options]
	***********************************************/
$removed_options = wppizza_compare_options($options, $defaultOptions);
/*get obsolete options**/
/*ini array*/
$arr1_flat = array();
$arr2_flat = array();
/*flatten*/
$arr1_flat = wppizza_flatten($update_options);
$arr2_flat = wppizza_flatten($removed_options);
/*get difference*/
$ret = array_diff_assoc($arr1_flat, $arr2_flat);
/**unflatten->final options**/
$update_options = wppizza_inflate($ret);
/******************************************************************************************************
 *
 * $update_options now holds old options plus the added new defaults options minus the removed options
 *
function wppizza_compare_options($a1, $a2)
{
    $r = array();
    if (is_array($a1)) {
        foreach ($a1 as $k => $v) {
            if (isset($a2[$k])) {
                $diff = wppizza_compare_options($a1[$k], $a2[$k]);
                if (!empty($diff)) {
                    $r[$k] = $diff;
                }
            } else {
                $r[$k] = $v;
            }
        }
    }
    return $r;
}