Iyzipay\Request\CreateCardRequest::toPKIRequestString PHP Метод

    public function toPKIRequestString()
    {
        return RequestStringBuilder::create()->appendSuper(parent::toPKIRequestString())->append("externalId", $this->getExternalId())->append("email", $this->getEmail())->append("cardUserKey", $this->getCardUserKey())->append("card", $this->getCard())->getRequestString();
    }