setLocale("TR"); $request->setConversationId("123123123"); $request->setSubscriptionReferenceCode("85eaa655-c3fd-4053-9e9b-dacc9e201c5f"); $request->setNewPricingPlanReferenceCode("5308630d-fb0a-453f-b30a-5afa719d5191"); $request->setUpgradePeriod("NOW"); $request->setUseTrial(true); $request->setResetRecurrenceCount(true); $result = \Iyzipay\Model\Subscription\SubscriptionUpgrade::update($request,Config::options()); print_r($result);