如何将网站中的用户名链接到 PayPal 信息电子邮件？
这不是问题，但我不知道该怎么做；假设我有一个注册表单，其中包含一些字段：用户名、密码、电子邮件，正如您所知，用户点击“购买”按钮并付款。
好吧，我怎么知道刚刚付款的用户名，我的意思是如何将这两件事链接在一起，一种想法是使用电子邮件地址，但大多数人使用不同的电子邮件地址注册，也许他们有一个不同的贝宝地址...你知道...我需要这些信息，因为我需要一种激活帐户的方法。
我还需要知道，如果用户取消订阅，PayPal 是否会向我的 IPN 链接发布消息？
It's not a problem but i don't know how to do this; let's say that I have a sign up form with some fields: username, password, email, as you know the user clicks on the BUY BUTTON and pay's up.
Well, how can I know the username that just made the payment, I mean how can I link those two things together, one idea it's to use the email address, but mose of the people sign up with different email addresses, mabe they have a different paypal address...you know...I need this information because I need a way to activate the account.
And I also need to know, if the user canceled a subscription will paypal post a message to my IPN link?
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我建议您使用以下 PHP 脚本来轻松与 PayPal 服务集成（假设您使用的是 PHP）： http://www.micahcarrick.com/04-19-2005/php-paypal-ipn-integration-class.html
如果您这样做，e - 将提供您要查找的邮件
（再次假设
$paypal是您的 paypal_class 类的对象）显然您必须首先遵循设置步骤。我建议使用示例脚本。这真的很容易做到——只需四个步骤。
I suggest you use the following PHP script for easy integration with PayPal's service (assuming you're using PHP): http://www.micahcarrick.com/04-19-2005/php-paypal-ipn-integration-class.html
If you do, the e-mail you will be looking for will be supplied in
(again, assuming that
$paypalis your object of the paypal_class class)Obviously you have to follow the setup steps first. I suggest using the example script. It is really easy to do - in only four steps.
我建议您阅读有关 IPN 和定期付款的 PayPal 官方文档。
PayPal 为用户订阅发生的每个事件发出 IPN，例如：
subscr_signup
子脚本_eot
取消订阅
subscr_failed
关于该参数，您可以使用名为“custom”的参数来传递一个值，例如用户 ID 或电子邮件，该参数将在每个 IPN 中发送给您。
I suggest you read the official paypal documentation about IPN and recurring payments.
PayPal issues a IPN for every event that occurs to the user subscription, for example:
subscr_signup
subscr_eot
subscr_cancel
subscr_failed
About the parameter, you can use a parameter named "custom" to pass a value, for example the user id or email, and that parameter will be sent you in every IPN.
以下是 PayPal IPN 在 C# 和 VB 中的实现：
http://www.xdevsoftware.com/PPIPNDesc .aspx
以下是我如何将其合并到 PayPal 订阅方案中的说明：
http://www.codersbarn.com/post/2008/07/10/ASPNET-PayPal-Subscriptions-IPN.aspx
Here are implementations of the PayPal IPN in both C# and VB:
http://www.xdevsoftware.com/PPIPNDesc.aspx
Here's an account of how I incorporated it into a PayPal subscriptions scenario:
http://www.codersbarn.com/post/2008/07/10/ASPNET-PayPal-Subscriptions-IPN.aspx