JFIFxxC      C  " }!1AQa"q2#BR$3br %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz w!1AQaq"2B #3RbrsetLocale(\Iyzipay\Model\Locale::TR); $request->setConversationId("123456789"); $request->setPaymentId("123456789"); $request->setPaymentConversationId("123456789"); # make request $payment = \Iyzipay\Model\PaymentPreAuth::retrieve($request, Config::options()); # print response print_r($payment); #verify signature $paymentId = $payment->getPaymentId(); $currency = $payment->getCurrency(); $basketId = $payment->getBasketId(); $conversationId = $payment->getConversationId(); $paidPrice = $payment->getPaidPrice(); $price = $payment->getPrice(); $signature = $payment->getSignature(); $calculatedSignature = calculateHmacSHA256Signature(array($paymentId, $currency, $basketId, $conversationId, $paidPrice, $price)); $verified = $signature == $calculatedSignature; echo "Signature verified: $verified";