更新：我什至尝试过让整个 PHP 脚本成为一行，在查看脚本时向我发送电子邮件，但它仍然不会向我发送电子邮件。
我已经尝试了一切，或者我觉得。我已经设置了脚本（非常基本，所以我可以学习如何使用它）以根据 IPN 响应（已完成、无效等）插入一行
但是，它似乎没有做任何事情。
我试过使用沙盒内置的 IPN 测试器，但它什么也没做。我尝试使用基于沙盒的捐赠者按钮，并将“notify_url”作为隐藏输入类型，但它没有做任何事情。
唯一一次实际插入一行是当我直接通过浏览器访问文件时（当然是 IPN 文件）。在这种情况下，它会插入一行说明这是无效付款。
我到底做错了什么，还是 PayPal 的沙箱暂时搞砸了？
<?php
require("../functions.php");
sql();
// read the post from PayPal system and add 'cmd'
$req = 'cmd=' . urlencode('_notify-validate');
foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&$key=$value";
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://www.sandbox.paypal.com/cgi-bin/webscr');
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Host: www.paypal.com'));
$res = curl_exec($ch);
curl_close($ch);
// assign posted variables to local variables
$item_name = $_POST['item_name'];
$item_number = $_POST['item_number'];
$payment_status = $_POST['payment_status'];
$payment_amount = $_POST['mc_gross'];
$payment_currency = $_POST['mc_currency'];
$txn_id = $_POST['txn_id'];
$receiver_email = $_POST['receiver_email'];
$payer_email = $_POST['payer_email'];
if (strcmp ($res, "VERIFIED") == 0) {
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
if($payment_status == "Completed") {
mysql_query("INSERT INTO donators (username)
VALUES ('completed')");
} else {
mysql_query("INSERT INTO donators (username)
VALUES ('wrong payment status')");
}
}
else if (strcmp ($res, "INVALID") == 0) {
mysql_query("INSERT INTO donators (username)
VALUES ('invalid')");
}
?>
捐赠人表格：
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="QJUZ2AGANUWYS">
<input name="notify_url" value="http://mysite.com/libs/paypal/ipn.php" type="hidden">
<input type="image" src="https://www.sandbox.paypal.com/en_US/i/btn/btn_donateCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
<img alt="" border="0" src="https://www.sandbox.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>