PayPal IPN 取消订阅
我正在使用 PayPal IPN（即时付款通知）API 进行订阅，但我找不到让用户自行取消订阅的方法。到目前为止我找到的解决方案要求客户登录贝宝，但是使用信用卡付款/没有贝宝的用户怎么办？这非常令人沮丧。我今天一整天都在寻找解决方案。
I'm using the PayPal IPN (Instant Payment Notification) api for subscriptions but I can't find a way to let users UNSUBSCRIBE themselves. The solutions I've found so far require the customer to login to paypal but what about the users who paid with a creditcard/don't have paypal? This is very frustrating. I've the entire day today looking for a solution to this.
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如果您创建已保存的按钮，您可以“查看”该按钮，并且有一个用于创建取消订阅按钮的链接。如果您不使用已保存的按钮，我不知道如何创建取消订阅按钮。
If you create a saved button you can 'view' the button and there is a link to create an unsubscribe button. I do not know of a way to create an unsubscribe button if you don't use a saved button.
订阅过程在您的站点中启动，因为它需要携带来自您站点的产品信息。订阅过程完成后，买家应该在他们的贝宝帐户中看到这一点，并可以从那里取消订阅。
原因可能是因为您无法存储买家的 PayPal 用户名和密码并使用它从 PayPal 获取该买家的订阅列表。这就是为什么买家必须在 PayPal 网站而不是您的网站上完成此操作。
The subscription process is initiated in your site because it need to carry the product information from your site. After the subscription process done, the buyer should see this in their paypal account and can unsubscribe from there.
The reason for this maybe because you cannot store the buyer's paypal username and password and use it to fetch that buyer's subscription list from paypal. That's why it's must be done by the buyer in the paypal website, not in your site.