PayPal PHP创建多个商家的订单并支付一次

<?php
// 引入PayPal SDK的autoload文件
require 'vendor/autoload.php';

use PayPal\Api\Amount;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\PaymentExecution;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Transaction;
use PayPal\Rest\ApiContext;

// 设置PayPal API凭证
$clientId = 'YOUR_CLIENT_ID';
$clientSecret = 'YOUR_CLIENT_SECRET';
$apiContext = new ApiContext(
    new \PayPal\Auth\OAuthTokenCredential($clientId, $clientSecret)
);

// 创建订单
function createOrder($apiContext, $amount, $description, $returnUrl, $cancelUrl) {
    // 设置付款人
    $payer = new Payer();
    $payer->setPaymentMethod('paypal');

    // 设置交易金额
    $transactionAmount = new Amount();
    $transactionAmount->setTotal($amount);
    $transactionAmount->setCurrency('USD');

    // 创建交易
    $transaction = new Transaction();
    $transaction->setAmount($transactionAmount);
    $transaction->setDescription($description);

    // 设置重定向URL
    $redirectUrls = new RedirectUrls();
    $redirectUrls->setReturnUrl($returnUrl)
        ->setCancelUrl($cancelUrl);

    // 创建支付对象
    $payment = new Payment();
    $payment->setIntent('sale')
        ->setPayer($payer)
        ->setTransactions([$transaction])
        ->setRedirectUrls($redirectUrls);

    // 发起支付请求
    try {
        $payment->create($apiContext);
        return $payment;
    } catch (Exception $e) {
        // 处理异常
        die($e);
    }
}

// 执行支付
function executePayment($apiContext, $paymentId, $payerId) {
    $payment = Payment::get($paymentId, $apiContext);

    $execution = new PaymentExecution();
    $execution->setPayerId($payerId);

    try {
        $payment->execute($execution, $apiContext);
        return $payment;
    } catch (Exception $e) {
        // 处理异常
        die($e);
    }
}

// 创建订单并支付
$amount = '100.00'; // 订单金额
$description = 'Multiple Merchants Order'; // 订单描述
$returnUrl = 'https://example.com/success'; // 支付成功后的重定向URL
$cancelUrl = 'https://example.com/cancel'; // 支付取消后的重定向URL

$payment = createOrder($apiContext, $amount, $description, $returnUrl, $cancelUrl);

// 获取支付链接
$approvalUrl = $payment->getApprovalLink();

// 重定向用户到支付页面
header("Location: $approvalUrl");