interface PaymentInterface
{
    public function pay(PaymentRequest $request);
}

class Payment implements PaymentInterface
{
    public function pay(PaymentRequest $request)
    {
        if ($request->isFirstPayment()) {
            $this->firstPayment->pay($request);
        } else {
            $this->tokenPayment->pay($request);
        }
    }
}

$payment->pay($paymentRequest);

class PaymentFactory
{
    public static function choosePayment(PaymentRequest $request)
    {
        if ($request->isFirstPayment()) {
            return new FirstPayment();
        }

        return new TokenPayment();
    }
}

$payment = PaymentFactory::choosePayment($paymentRequest);
$payment->pay($paymentRequest);