Infusionsoft_RecurringOrder::getFirstOrderId PHP Method

    public static function getFirstOrderId($recurringOrderId)
    {
        //load recurringOrder
        $recurringOrder = new Infusionsoft_RecurringOrder($recurringOrderId);
        //If there was an originating shopping cart or order form order, that is the first order
        if ($recurringOrder->OriginatingOrderId != 0) {
            return $recurringOrder->OriginatingOrderId;
        } else {
            //find all Orders with a matching JobRecurringId and put them in this array, sorted by date.
            $matchingOrders = Infusionsoft_DataService::queryWithOrderBy(new Infusionsoft_Job(), array('JobRecurringId' => $recurringOrderId), 'DateCreated');
            if (!empty($matchingOrders)) {
                $earliestMatchingOrder = array_shift($matchingOrders);
                return $earliestMatchingOrder->Id;
            } else {
                return false;
            }
        }
    }