PayPal Rest API直接付款

Question

我目前让我的网站通过PayPal接受付款。我使用PHP SDK作为REST API来处理这个问题。这是我通过我的网站处理付款的步骤：

1. Create a payment意图设置为“Sale”，付款方式设置为“paypal”，重定向网址设置为确认页面。
2. 在确认页面上，我将返回的paymentId和PayerID（来自查询字符串）存储在步骤3中使用。
3. 一旦用户确认订单，我就execute the payment传递第2步中存储的paymentId和PayerID。

这是一种享受。但是，我想让用户选择通过PayPal（如上）或通过我的网站（使用PayPal直接付款）处理付款。

对于直接付款，我已成功创建付款方式，将意图设置为“促销”，付款方式为“credit_card”并传递相应的信用卡详细信息。但是，我不确定我是否需要像之前那样执行付款，或者付款是否自动完成。

如果我确实需要执行付款，那么如何获得paymentId和PayerID？如果我不需要执行付款，则会出现问题，因为我希望用户确认付款。我可以将创建支付内容移动到仅在用户确认直接付款订单后才执行，但是在用户输入后我无法验证卡详细信息。我想知道是否有更好的方法来解决这个问题？

如果有人能帮忙解决这个问题，我会很感激。感谢

Answer 1

You'll just need to process the first step (create the payment) when it comes to a credit card (detailed here: https://developer.paypal.com/docs/integration/direct/accept-credit-cards/).

For your other question about the issues in not being able to have the user confirm, there are a few things you can do:

• Move the "confirmation" to before you actually process the card
• Use the auth / capture method instead (https://developer.paypal.com/docs/classic/paypal-payments-standard/integration-guide/authcapture/)

Since I think auth/capture is closer to what you're thinking about doing, let me dig in there a bit further. What you're essentially doing is authorizing the funds (holding them on the user's payment source) and then capturing them at a later time. This is the same premise as a hotel putting a hold on your credit card for incidentals, and later canceling the hold.

You can do all of this with the PayPal REST API. Here are the features you're looking for:

• Authorizing funds: https://developer.paypal.com/docs/api/#authorizations
• Capturing funds (at a later time): https://developer.paypal.com/docs/api/#captures
• Voiding (canceling) an authorized hold of funds if a suer doesn't want to process: https://developer.paypal.com/docs/api/#void-an-authorization

After you authorize, that's the point where the user can confirm and you can validate the card. Once everything is approved, you can then capture.

I know this isn't going to be an issue for you, but I'll mention it anyways. With auth/capture, authorized funds will be guaranteed to be there for only 3 days (honor period), but you can keep trying to capture the funds for 29 days. After those 3 days though, there isn't a guarantee that the funds will be present.

Hope that helps