真的在 Paypal IPN 上苦苦挣扎

Question

更新 - 我删除了验证，并添加了一个 $item_id = $_POST['option_selection1'];到我的领域，突然间它起作用了！

我有一个摄影师的网站，她全天都在出售时段。我正在尝试设置她，以便有人选择一个时间段，通过 paypal 购买，然后当通过 IPN 返回数据时，我捕获用于购买的电子邮件地址，以及我关联的 ID与时隙。使用该 ID，我在数据库中设置了一个开关，导致该时间段不再填充在表单上，因此其他人无法购买相同的时间段。每次做测试交易，数据库都不更新，不知道为什么。当我手动设置变量 $payer_email 和 $item_number 的值时，数据库执行我期望的操作。由此，我的印象是 PayPal 没有验证数据，或者它没有以我期望的方式发送数据。

这是我通过 PayPal 运行表单的代码：

   // Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
     die("Connection failed: " . $conn->connect_error);
} 

$sql = "SELECT id,hour,minute,toggle FROM mini ORDER BY id ASC";
$result = $conn->query($sql);
echo '<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">';
echo '<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="B6XDLRPVAUBQJ">
<input type="hidden" name="on0" value="item_number">
<select name="os0">';
if ($result->num_rows > 0) {
     // output data of each row
     while($row = $result->fetch_assoc()) {
          if ($row["toggle"] == 0){ 
              echo '<option value="'.$row["id"].'">'.$row["hour"].':'.$row["minute"].' '; //id is what I'm trying to extract from paypal via IPN
              if ($row["id"] <  13){echo 'AM';}else{echo 'PM';}; //if-then statement determines if it is AM or PM based on id
              echo '</option>';
          };
     }
} else {
     echo "Sorry, I'm fully booked!";
}

?>
</select>
<input type="submit" name="submit" value="Book Your Session">
</form>

这是我的 IPN 代码

<?php
// STEP 1: read POST data
// Reading POSTed data directly from $_POST causes serialization issues with array data in the POST.
// Instead, read raw POST data from the input stream. 
$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 IPN message sent from PayPal and prepend 'cmd=_notify-validate'
$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";
}

// STEP 2: POST IPN data back to PayPal to validate
$ch = curl_init('https://www.paypal.com/cgi-bin/webscr');
curl_setopt($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);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));
// In wamp-like environments that do not come bundled with root authority certificates,
// please download 'cacert.pem' from "http://curl.haxx.se/docs/caextract.html" and set 
// the directory path of the certificate as shown below:
// curl_setopt($ch, CURLOPT_CAINFO, dirname(__FILE__) . '/cacert.pem');
if( !($res = curl_exec($ch)) ) {
    // error_log("Got " . curl_error($ch) . " when processing IPN data");
    curl_close($ch);
    exit;
}
curl_close($ch);

// STEP 3: Inspect IPN validation result and act accordingly
if (strcmp ($res, "VERIFIED") == 0) {
    // The IPN is verified, process it:
    // check whether 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 the notification
    // 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 = $_POST['payer_email'];
    // IPN message values depend upon the type of notification sent.
    // To loop thffrough the &_POST array and print the NV pairs to the screen:
    foreach($_POST as $key => $value) {
      echo $key." = ". $value."<br>";
    }
} else if (strcmp ($res, "INVALID") == 0) {
    // IPN invalid, log for manual investigation
    echo "The response from IPN was: <b>" .$res ."</b>";
}

//database credentials intentionally omitted :)
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
     die("Connection failed: " . $conn->connect_error);
} 

$sql = "UPDATE mini SET toggle='1',email='".$payer_email."' WHERE id=('".$item_number."')";


if ($conn->query($sql) === TRUE) {
    echo "<br/> - Record updated successfully";
} else {
    echo "Error updating record: " . $conn->error;
}


?>

Answer 1

我建议您尝试使用 PaymentDetails API 来调试您正在测试的付款状态。

https://developer.paypal.com/docs/classic/api/adaptive-payments/PaymentDetails_API_Operation/

此外，PayPal 沙箱也有点不同，速度较慢且错误较多 - 因此您应该使用一些日志记录。记录发布的所有内容和验证响应。完成之后，您可以专注于应用程序的逻辑。

真的在 Paypal IPN 上苦苦挣扎

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