大家好，我一周就遇到了这个问题。我想要做的是通过paypal按钮传递包含pdf的所有数据的php中的变量，以便稍后在我的页面上进行处理。所以我的代码是由paypal生成的，其中我添加了notify_url和自定义变量。
<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="AEJ7FLWRMAK44">
<input type="hidden" name="notify_url" value="http://mysite.it/ipn_listener.php">
<input type="hidden" name="custom" value="<?php $base; ?>">
<input type="image" src="https://www.paypalobjects.com/it_IT/IT/i/btn/btn_buynow_SM.gif" border="0" name="submit" alt="PayPal è il metodo rapido e sicuro per pagare e farsi pagare online.">
<img alt="" border="0" src="https://www.paypalobjects.com/it_IT/i/scr/pixel.gif" width="1" height="1">
</form>
变量$ base包含在此页面中创建的PDF的所有数据，我需要通过paypal表单传递它们。 这里是监听器的代码（直接来自paypal）。
<?php
require('fpdf.php');
// CONFIG: Enable debug mode. This means we'll log requests into 'ipn.log' in the same directory.
// Especially useful if you encounter network errors or other intermittent problems with IPN (validation).
// Set this to 0 once you go live or don't require logging.
define("DEBUG", 1);
// Set to 0 once you're ready to go live
define("USE_SANDBOX", 0);
define("LOG_FILE", "./ipn.log");
// Read POST data
// reading posted data directly from $_POST causes serialization
// issues with array data in POST. Reading raw POST data from input stream instead.
$raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
$keyval = explode ('=', $keyval);
if (count($keyval) == 2)
$myPost[$keyval[0]] = urldecode($keyval[1]);
}
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
if(function_exists('get_magic_quotes_gpc')) {
$get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
if($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
$value = urlencode(stripslashes($value));
} else {
$value = urlencode($value);
}
$req .= "&$key=$value";
}
// Post IPN data back to PayPal to validate the IPN data is genuine
// Without this step anyone can fake IPN data
if(USE_SANDBOX == true) {
$paypal_url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
} else {
$paypal_url = "https://www.paypal.com/cgi-bin/webscr";
}
$ch = curl_init($paypal_url);
if ($ch == FALSE) {
return FALSE;
}
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
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_FORBID_REUSE, 1);
if(DEBUG == true) {
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLINFO_HEADER_OUT, 1);
}
// CONFIG: Optional proxy configuration
//curl_setopt($ch, CURLOPT_PROXY, $proxy);
//curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
// Set TCP timeout to 30 seconds
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
// CONFIG: Please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set the directory path
// of the certificate as shown below. Ensure the file is readable by the webserver.
// This is mandatory for some environments.
//$cert = __DIR__ . "./cacert.pem";
//curl_setopt($ch, CURLOPT_CAINFO, $cert);
$res = curl_exec($ch);
if (curl_errno($ch) != 0) // cURL error
{
if(DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Can't connect to PayPal to validate IPN message: " . curl_error($ch) . PHP_EOL, 3, LOG_FILE);
}
curl_close($ch);
exit;
} else {
// Log the entire HTTP response if debug is switched on.
if(DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "HTTP request of validation request:". curl_getinfo($ch, CURLINFO_HEADER_OUT) ." for IPN payload: $req" . PHP_EOL, 3, LOG_FILE);
error_log(date('[Y-m-d H:i e] '). "HTTP response of validation request: $res" . PHP_EOL, 3, LOG_FILE);
}
curl_close($ch);
}
echo $res;
// Inspect IPN validation result and act accordingly
// Split response headers and payload, a better way for strcmp
$tokens = explode("\r\n\r\n", trim($res));
$res = trim(end($tokens));
if (strcmp ($res, "VERIFIED") == 0) {
// check whether the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your PayPal email
// check that payment_amount/payment_currency are correct
// process payment and mark item as paid.
// 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'];
$plan = $_POST ['$custom'];
$plan -> Output('filename.pdf','D');
if(DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Verified IPN: $req ". PHP_EOL, 3, LOG_FILE);
}
} else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
// Add business logic here which deals with invalid IPN messages
if(DEBUG == true) {
error_log(date('[Y-m-d H:i e] '). "Invalid IPN: $req" . PHP_EOL, 3, LOG_FILE);
}
}
?>
这是付款后产生的日志：
[2015-12-13 13:06 UTC] HTTP request of validation request:POST /cgi-bin/webscr HTTP/1.1
Host: www.paypal.com
Accept: */*
Connection: Close
Content-Length: 20
Content-Type: application/x-www-form-urlencoded
for IPN payload: cmd=_notify-validate
[2015-12-13 13:06 UTC] HTTP response of validation request: HTTP/1.1 200 OK
Server: Apache
X-Frame-Options: SAMEORIGIN
Paypal-Debug-Id: 3c9689e4c464d
Cache-Control: max-age=0, no-cache, no-store, must-revalidate
Pragma: no-cache
Content-Type: text/html; charset=UTF-8
DC: dcg11-origin-www-2.paypal.com
Date: Sun, 13 Dec 2015 13:06:48 GMT
Content-Length: 7
Connection: close
Set-Cookie: cwrClyrK4LoCV1fydGbAxiNL6iG=h1DUElHT0plodZm1lFPnTdqF1LiGzLoXG7dYHHRSRG9RL2cia6MdmQ6MahF1Zv2nJHPi_OHvGTI9k7icIO_xteZXVKW6_1Eanm2OzV6EUhqfCx5RaJVVZ0k6kREma-fge47I2jdAUVmGU3WkpxycLClRTtW4yxG7Upafo701Ey7HFKhzN9Q9h0FlegIaInROJAbI6it8h-Mvg-2rOIsVPBRkIJ132Jmyg0Yg0-Gi0_gQjnixauCWZ8J3yrCA_--4FroiKAAF5oRfqVPwGs9nmUOMA7nPwgSf0HHZQ6uCJ7LSUkfU3ezY77NrNaLnnEpZQ59MNutMaQeR5Blt3aAKCVQdOKicNO7ilgSho4_MygvMVCsUxcDhmlFaGE5KmkkYHdRW7MpIXivjpwSf987gDNope3f8dyq06XXnMeBMiCNhpKlh5BclrWcI7Cm; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: cookie_check=yes; expires=Wed, 10-Dec-2025 13:06:48 GMT; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: navcmd=_notify-validate; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: navlns=0.0; expires=Tue, 12-Dec-2017 13:06:48 GMT; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: X-PP-SILOVER=name%3DLIVE9.WEB.1%26silo_version%3D880%26app%3Dappdispatcher%26TIME%3D1735224662; domain=.paypal.com; path=/; Secure; HttpOnly
Set-Cookie: X-PP-SILOVER=; Expires=Thu, 01 Jan 1970 00:00:01 GMT
Set-Cookie: Apache=10.16.1.3.1450012007804246; path=/; expires=Tue, 05-Dec-45 13:06:47 GMT
Set-Cookie: AKDC=dcg11-origin-www-2.paypal.com; expires=Sun, 13-Dec-2015 13:36:48 GMT; path=/; secure
Strict-Transport-Security: max-age=63072000
INVALID
[2015-12-13 13:06 UTC] Invalid IPN: cmd=_notify-validate
我已经在我的paypal帐户中激活了IPN，但我总是返回无效，同时删除发送和接收变量的代码片段，结果不会改变。有人能帮助我吗？这个问题让我头疼了一个星期。在此先感谢所有人的回答。