无法在 Stripe Webhook 中检索会话的变量值

我正在我的网站中设置 Stripe 订阅 Webhook。我按照文档进行操作，现在 Webhook 已设置在我的网站中。

现在，我希望更新网站数据库上的一条记录，其中在我的一个用户订阅我的会员计划后，记录上的一列被设置为另一个值。我尝试在会话 PHPSESSID 中检索会话值，其中包含电子邮件地址。

使用 SQL 'WHERE' 子句，我尝试了以下操作：

$sql = "UPDATE xxxxxx SET Plan = 'Professional' WHERE EmailAddress = '$email'";

 if ($conn->query($sql) === TRUE) 
 {
     echo "You have subscribed to the professional plan";
 } 
 else 
 {
     echo "Error: " . $sql . "<br>" . $conn->error;
 }

            $conn->close();

请注意：

• SQL 语法在我的 phpmyadmin 网站上完美运行。
• mysqli 连接到我网站的数据库。
• Webhook 也可以毫无问题地运行。

唯一的问题是处理付款后我无法在 webhook 上运行 SQL 查询。经过一些调试，我发现 PHPSESSID 会话中的电子邮件变量没有传递到“UPDATE xxxxxx SET Plan = 'Professional'”行。

<?php    
session_name("PHPSESSID");   
session_start();    
$email = $_SESSION["email_address"];

require_once('stripe-php/init.php');

\Stripe\Stripe::setApiKey('xxxxxx');

$endpoint_secret = 'xxxxxx';

$payload = @file_get_contents('php://input');
$sig_header = $_SERVER['HTTP_STRIPE_SIGNATURE'];
$event = null; 

 try {
  $event = \Stripe\Webhook::constructEvent(
    $payload, $sig_header, $endpoint_secret
  );
 } catch(\UnexpectedValueException $e) {
  http_response_code(400);
  exit();
} catch(\Stripe\Error\SignatureVerification $e) {
  http_response_code(400);
  exit();
} 

// Handle the checkout.session.completed event
if ($event->type == 'checkout.session.completed') 
{
    $servername = "localhost";
    $username = "xxxxxx";
    $password = "xxxxxxx";
    $dbname = "xxxxxxx";

    // Create connection
    $conn = new mysqli($servername, $username, $password, $dbname);

    // Check connection
    if ($conn->connect_error) 
    {
        die("Connection failed: " . $conn->connect_error);
    } 

    $amount = $event['data']['object']['display_items'][0]['amount'];


    switch ($amount)
    {
        case 499:
        {       
            $sql = "UPDATE xxxxxx SET Plan = 'Professional' WHERE EmailAddress = '$email'";

            if ($conn->query($sql) === TRUE) 
            {
                echo "You have subscribed to the professional plan";
            } 
            else 
            {
                echo "Error: " . $sql . "<br>" . $conn->error;
            }

            $conn->close();
        }
        break;

        case 899:
        {

            $sql = "UPDATE xxxxxx SET Plan = 'Premium' WHERE EmailAddress = 'xxxxxx'";

            if ($conn->query($sql) === TRUE) 
            {
                echo "You have subscribed to the Premium plan";
            } 
            else 
            {
                echo "Error: " . $sql . "<br>" . $conn->error;
            }

            $conn->close();
        }
        break;   

        default:
        {

            $sql = "UPDATE xxxxxx SET Plan = 'Premium' WHERE EmailAddress = '$email'";

            if ($conn->query($sql) === TRUE) 
            {
                echo "You have subscribed to the Premium plan on free trial.";
            } 
            else 
            {
                echo "Error: " . $sql . "<br>" . $conn->error;
            }

            $conn->close();
        }
    }
}

http_response_code(200);
?>

关于如何传递变量值有什么建议吗？或者我在这里做的整个 webhook 事情都是错误的？

解决了！

我发现在 webhook JSON 日志上，用户完成付款后有一个客户 ID。因此，我可以使用 ID 来获取电子邮件地址。

这是代码：

$amount = $event['data']['object']['display_items'][0]['amount'];
// Retrieve the customer ID
$customerToken = $event['data']['object']['customer'];
switch ($amount)
{
    case 499:
    {
        // Fetch the email address      
        $customerInfo = \Stripe\Customer::retrieve($customerToken);
        $email = $customerInfo->email;

        // Use the email variable on the SQL query           
        $sql = "UPDATE JobDesktop.UserDatabase SET Plan = 'Professional' WHERE EmailAddress = '$email'";

        if ($conn->query($sql) === TRUE) 
        {
            echo "You have subscribed to the professional plan";
        } 
        else 
        {
            echo "Error: " . $sql . "<br>" . $conn->error;
        }

        $conn->close();
    }
// The rest of the code down below