Iyzipay\Request\CreateBasicPaymentRequest::toPKIRequestString PHP Method

    public function toPKIRequestString()
    {
        return RequestStringBuilder::create()->appendSuper(parent::toPKIRequestString())->appendPrice("price", $this->getPrice())->appendPrice("paidPrice", $this->getPaidPrice())->append("installment", $this->getInstallment())->append("buyerEmail", $this->getBuyerEmail())->append("buyerId", $this->getBuyerId())->append("buyerIp", $this->getBuyerIp())->append("posOrderId", $this->getPosOrderId())->append("paymentCard", $this->getPaymentCard())->append("currency", $this->getCurrency())->append("connectorName", $this->getConnectorName())->append("callbackUrl", $this->getCallbackUrl())->getRequestString();
    }