Paypal IPN腳本不起作用

Question

出於某種原因，我的腳本連接到數據庫，並沒有錯誤，但數據庫中似乎沒有任何更新。我找不到任何問題。這裏是我的代碼：

// 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"; 
    $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']; 
    $txn_id = $_POST['txn_id']; 
    $receiver_email = $_POST['receiver_email']; 
    $payer_email = $_POST['payer_email']; 
    $user_id = mysql_real_escape_string($_POST['custom']); 
    $today = date("F j, Y, g:i a"); 

    echo "hi"; 

    if (!$fp) { 
     // HTTP ERROR 
    } else { 
     fputs ($fp, $header . $req); 
     while (!feof($fp)) { 
     $res = fgets ($fp, 1024); 
     if (strcmp ($res, "VERIFIED") == 0) { 
      if ($payment_status=='Completed') { 
       $txn_id_check = mysql_query("SELECT 'txn_id' FROM 'log' WHERE 'txn_id' ='".$txn_id."'"); 
       if (mysql_num_rows($txn_id_check) !=1) { 
        if ($receiver_email=='HiddenForStackQuestion') { 
         if ($payment_amount=='29.95' && $payment_currency=='USD') { 
         $log_query = mysql_query("INSERT INTO 'log' VALUES ('','".$txn_id."','".$payer_email."')"); 
         $update_premium = mysql_query("UPDATE 'users' SET authLevel='1', startDate='".$today."' WHERE 'fbID'='".$user_id."'"); 

         } 

         } 

        } 
      } 


     } 
     else if (strcmp ($res, "INVALID") == 0) { 
      // log for manual investigation 
     } 
     } 
     fclose ($fp); 
    } 
    ?> 

而這裏是我的按鈕。

<form action="https://www.paypal.com/cgi-bin/webscr" method="post"> 
    <input type="hidden" name="cmd" value="_xclick-subscriptions"> 
    <input type="hidden" name="business" value="hiddenForStackQuestion"> 
    <input type="hidden" name="lc" value="US"> 
    <input type="hidden" name="item_name" value="hiddenForStackQuestion"> 
    <input type="hidden" name="no_note" value="1"> 
    <input type="hidden" name="no_shipping" value="2"> 
    <input type="hidden" name="rm" value="1"> 
    <input type="hidden" name="return" value="hiddenForStackQuestion"> 
    <input type="hidden" name="cancel_return" value="hiddenForStackQuestion"> 
    <input type="hidden" name="src" value="1"> 
    <input type="hidden" name="a3" value="29.95"> 
    <input type="hidden" name="p3" value="1"> 
    <input type="hidden" name="t3" value="Y"> 
    <input type="hidden" name="notify_url" value="hiddenForStackQuestion" /> 
      <input type="hidden" name="custom" value="<?php echo $userId ?>" /> 
    <input type="hidden" name="currency_code" value="USD"> 
    <input type="hidden" name="bn" value="PP-SubscriptionsBF:btn_subscribeCC_LG.gif:NonHosted"> 
    <input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_subscribeCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!" style="border:none;"> 
    </form> 

我一直在這一段時間，但我沒有運氣。任何人看到有什麼不對？

Answer 1

這

<input type="hidden" name="notify_url" value="hiddenForStackQuestion" /> 

不會發生在本地主機託管，我希望？ IPN POST由PayPal的服務器啓動，因此必須是FQDN。本地主機不起作用。