我在PayPal沙箱按钮中创建了一个创建的递归付款按钮。但是在付款后从PayPal付款返回测试帐户时，IPN响应没有返回。在检查IPN历史记录时，它显示IPN消息已生成。
侦听器中的ipn_POST_data为空。
同样适用于简单的订阅按钮。
答案 0 :(得分：0)
我得到了答案
我们需要将变量'rm'设置为2。
<input type="hidden" name="rm" value="2">
0 – all shopping cart payments use the GET method
1 – the buyer's browser is redirected to the return URL by using the GET method, but no payment variables are included
2 – the buyer's browser is redirected to the return URL by using the POST method, and all payment variables are included
默认情况下，rm的值为0。
谢谢......