如何解决在线支付系统的开发难题？使用Composer可以轻松搞定！

composer require chargebee/chargebee-php

require_once('vendor/autoload.php');

use ChargeBee\ChargeBee\Environment;
use ChargeBee\ChargeBee\Subscription;

Environment::configure("your_site", "{your_site_api_key}");
$result = Subscription::create([
    "id" => "__dev__KyVqH3NW3f42fD",
    "planId" => "starter",
    "customer" => [
        "email" => "john@user.com",
        "firstName" => "John",
        "lastName" => "Wayne"
    ]
]);
$subscription = $result->subscription();
$customer = $result->customer();
$card = $result->card();

use ChargeBee\ChargeBee\Environment;
use ChargeBee\ChargeBee\Models\Customer;

Environment::configure("your_site", "{your_site_api_key}");
$result = Customer::create(array(
    "email" => "john@test.com",
    "first_name" => "john"
    ), 
    null, 
    array(
        "chargebee-idempotency-key" => "<<UUID>>"
        )
    ); // Replace <<UUID>> with a unique string
$customer = $result->customer();
print_r($customer);

$responseHeaders = $result->getResponseHeaders(); // Retrieves response headers
print_r($responseHeaders);
$idempotencyReplayedValue = $result->isIdempotencyReplayed(); // Retrieves Idempotency replayed header value
print_r($idempotencyReplayedValue);