如何使用自定义字段制作 PayPal 加密的“立即购买"按钮? [英] How do I make a PayPal encrypted buy now button with custom fields?

问题描述

有没有办法让我的 PHP 代码生成一个加密的 BuyNow 按钮，该按钮还包含自定义字段并实现 IPN URL 和重定向页面?

Is there a way that my PHP code can generate an encrypted BuyNow button that also includes custom fields and also implements an IPN URL and redirect page?

推荐答案

您不必加密.只需采用自定义"变量，除其他事项外，您可能需要在其中添加价格和产品编号的哈希值，如下所示:

You don't have to encrypt. Simply take the 'custom' variable, and, among other things you might need to put in there, add a hash of the price and product number, like so:

$sCustom .= '|' . md5($sSalt . $sProduct . $sPrice);

然后，在处理 IPN 时，请确保此散列不受接收到的内容的干扰.如果是，则阻止交易.

Then, when the IPN is processed, ensure that this hash was not disturbed with what is received back. If it was, then block the transaction.

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