Paypal IPN沙盒-IPN侦听器-未验证或无效

我在开发人员中设置了测试帐户Business和Personal，用于尝试沙箱模式。

我在我的网站上做了一个付款按钮。我点击按钮并转到贝宝。测试用户个人账户用于支付。当我查看Paypal商业账户时，付款会通过并完成。重定向到我的网站效果很好。

所以在我看来，我应该有一个"工作"系统。

我的IPN侦听器不会返回已验证或无效的消息

这是我的听众：

 <?php
 require("../widgets/init.inc.php");
//Test the script is launced
$log_query = mysql_query("INSERT INTO `log` VALUES (' ','zz','ff','rr', 'rr')");                
// Link to PayPal Codes //
// https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_html_IPNandPDTVariables // 
// read the post from PayPal system and add 'cmd' //
$req = 'cmd=_notify-validate';
foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&$key=$value";
}
// post back to PayPal system to validate //
$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'r'n";
//For the below line i have tried "www.sandbox.paypal" as well as "www.paypal"
$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);
// 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'];
$txnId = $_POST['txn_id'];
$receiverEmail = $_POST['receiver_email'];
$payerEmail = $_POST['payer_email'];
//$id = ($_POST['custom']);
if (!$fp) {
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
if ($payment_status=='Completed') {
//$txnIdCheck = mysql_query("SELECT `txnId` FROM `log` WHERE `txnId`='".$txnId."'");  
//if (mysql_num_rows($txnIdCheck) !=1) {
// enter your email address associated with your paypal account here // 
if ($receiverEmail=='biztester1@mydomain.dk') { 
/* when a new premium member makes payment paypal will update our database. The txn_id from paypal, members email address, date of payment and members id we gave them when they joined our site will be inserted into the log table. At the same time the memberAdmin table for the member will be updated by adding a '1' to premium and the date of payment so the new premium member will have access to premium areas of your site. */
//Check if verified is launced          
$log_query_2 = mysql_query("INSERT INTO `log` VALUES (' ','yes','yes','yes', 'yes')");          
//$log_query = mysql_query("INSERT INTO `log` VALUES (' ','".intval($id)."','".$txnId."','".$payerEmail."', now())");                   
//$update_premium = mysql_query("UPDATE `memberAdmin` SET `premium`=1, `premiumDate`=now() WHERE `id`=".intval($id)."");    
}       
//}
}
}
else if (strcmp ($res, "INVALID") == 0) {         
//Check if invalid is launced
$log_query_2 = mysql_query("INSERT INTO `log` VALUES (' ','no','no','no', 'no'");   
}
}
fclose ($fp);
}
?>

我已经在贝宝商业账户网站上激活了IPN。我制作了一个贝宝返回信息的txt文件，它看起来像这样：

==== Thu, 18 Jul 2013 01:34:21 +0200 ====
POST: mc_gross = 0.01
POST: protection_eligibility = Ineligible
POST: payer_id = 73WPPK8HKSW7C
POST: tax = 0.00
POST: payment_date = 15:15:20 Jul 17, 2013 PDT
POST: payment_status = Completed
POST: charset = windows-1252
POST: first_name = Niels
POST: mc_fee = 0.01
POST: notify_version = 3.7
POST: payer_status = verified
POST: business = biztester1@mydomain.dk
POST: quantity = 1
POST: verify_sign = A-ddKAwtxju4TpHGJOGq6c3ewj26AyiHsD.XO90coZ.4rVzOT7VyooKO
POST: payer_email = tester1@mydomain.dk
POST: txn_id = 6WH41489RE087103M
POST: payment_type = instant
POST: last_name = Tester
POST: receiver_email = biztester1@mydomain.dk
POST: payment_fee = 0.01
POST: receiver_id = PCX638B2M7WPA
POST: txn_type = web_accept
POST: item_name = 500Credits
POST: mc_currency = USD
POST: item_number = 1
POST: residence_country = DE
POST: test_ipn = 1
POST: handling_amount = 0.00
POST: transaction_subject = 500Credits
POST: payment_gross = 0.01
POST: shipping = 0.00
POST: ipn_track_id = 2dffcbf8767d3
InvoiceID: 
Custom1: 
Custom2: 
Custom3: 

这似乎比我认为的要困难得多。