如何使用 Stripe 和 PHP 增加付款次数（订阅）

Question

我正在尝试设置订阅并计算付款次数（使用 webhook）。 我正在使用这个文档： https://stripe.com/docs/recipes/installment-plan#signing-up-a-customer-for-an-installment-plan

但它是 Ruby on Rails。 我尝试添加元数据来计算付款：

       $subscription = \Stripe\Subscription::create(array(
  "customer" => $customer->id,
  "items" => array(
      array(
          "plan" => $plan->id,
      ),
  ),   
   "metadata" => ["number_payments" => 0]));

然后在我的 webhook 页面中，我想检索订阅并增加付款次数，但我不明白也不知道如何使用 PHP（来自 Stripe 示例代码here）：

def increment_payments_count(event)
# Grab the subscription line item.
sub =  event.data.object.lines.data[0]

# Execute only for installment plans.
if !sub.metadata[:installments_paid].nil?
# Recommendation: Log invoices and check for duplicate events.
# Recommendation: Note that we send $0 invoices for trials.
#                 You can verify the `amount_paid` attribute of
#                 the invoice object before incrementing the count.

    # Retrieve and increment the number of payments.
    count = sub.metadata[:installments_paid].to_i
    count += 1

感谢您的帮助！

Answer 1

您需要使用“更新订阅 API”在此处更新元数据：https://stripe.com/docs/api/subscriptions/update?lang=ruby#update_subscription-metadata