paypal ipn-回邮后没有收到paypal的回复

我在贝宝IPN上工作。我的应用程序成功地收到了来自Paypal的第一个通知，但是，在发送回发后，Paypal似乎没有回复回发是否有效

我从paypal开发者网站的示例代码中获得的大部分代码：

public function process(){

// Read the notification from PayPal and create the acknowledgement response
$req = 'cmd=_notify-validate';               // add 'cmd' to beginning of the acknowledgement you send back to PayPal

//$raw = file_get_contents("php://input");
foreach ($_POST as $key => $value) {         // Loop through the notification NV pairs
    $value = urlencode(stripslashes($value));  // Encode the values
    $req .= "&$key=$value";                    // Add the NV pairs to the acknowledgement
}

//Set up the acknowledgement request headers
$header = "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n";
$header .= "Connection: close\r\n\r\n";

//Open a socket for the acknowledgement request
//$fp = fsockopen ('ssl://www.sandbox.paypal.com', 443, $errno, $errstr, 30);

// Post request back to PayPal for validation
fputs ($fp, $header . $req);


while (!feof($fp)) {                     // While not EOF
    $res = fgets ($fp, 1024);              // Get the acknowledgement response
    //$res=stream_get_contents($fp, 1024);

    $this->emailtest(print_r($_POST,true) .'<br /><br />' . $header.$req);
    if (strcmp ($res, "VERIFIED") == 0) {  // Response is VERIFIED

        $this->emailtest('VERIFIED');
        // Send an email announcing the IPN message is VERIFIED
        //$mail_From = "IPN@example.com";
        //$mail_To = "Your-eMail-Address";
        //$mail_Subject = "VERIFIED IPN";
        //$mail_Body = $req;
        //mail($mail_To, $mail_Subject, $mail_Body, $mail_From);

        // Notification protocol is complete, OK to process notification contents

        // Possible processing steps for a payment might include the following:

        // Check that 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

    }

    else if (strcmp ($res, "INVALID") == 0) { // Response is INVALID

        $this->emailtest('INVALID');
        // Notification protocol is NOT complete, begin error handling

        // Send an email announcing the IPN message is INVALID
        $mail_From = "IPN@example.com";
        $mail_To = "Your-eMail-Address";
        $mail_Subject = "INVALID IPN";
        $mail_Body = $req;
        mail($mail_To, $mail_Subject, $mail_Body, $mail_From);
    }
}
fclose ($fp); 

---

提前谢谢

我通过另一个引用设法解决了这个问题，或者至少从IPN获得了一个回复[无效回复]——这毕竟是一个进步：

提及：

将标题格式更改为：

$header = "POST /cgi-bin/webscr HTTP/1.1\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Host: www.sandbox.paypal.com\r\n";  // www.paypal.com for a live site 
$header .= "Content-Length: " . strlen($req) . "\r\n"; 
$header .= "Connection: close\r\n\r\n";

和改变：

如果（strcmp（$res，“VERIFIED”）==0）

为此：

if（stripos（$res，“VERIFIED”）！==false）

---

谢谢！今天晚上，我试图更改HTTP 1.1，直到我更改了“已验证”的支票以匹配您的版本，我才识别出PayPal返回的任何响应

    if (stripos($res, "VERIFIED") !== false) :

---

现在，它在live PayPal网站上起到了一种作用，对我来说，有效的方法是删除connection close标题，并在PP的回复中添加一个trim。下面是标题：

$header  = "POST /cgi-bin/webscr HTTP/1.1\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Host: www.paypal.com\r\n"; 
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";

以下是fsockopen：

$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);

这是PP回复中的微调：

if (!$fp) {
// HTTP ERROR
  error_mail("Could not open socket");
//
} else {
  fputs ($fp, $header . $req);
  while (!feof($fp)) {
    $res = trim(fgets ($fp, 1024));
    }
//
// check the payment_status is Completed
// check that receiver_email is your Primary PayPal email
//
  if ((strcmp ($res, "VERIFIED") == 0) && ($payment_status == "Completed") && ($receiver_email == $valid_receiver_email)) {

这对我很管用

if (!$fp) {
// HTTP ERROR
  error_mail("Could not open socket");
//
} else {
  fputs ($fp, $header . $req);
  while (!feof($fp)) {
    $res = trim(fgets ($fp, 1024));
    }
//
// check the payment_status is Completed
// check that receiver_email is your Primary PayPal email
//
  if ((strcmp ($res, "VERIFIED") == 0) && ($payment_status == "Completed") && ($receiver_email == $valid_receiver_email)) {