如何使用PHP向paypal汇款

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

use PayPal\Api\Amount;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Transaction;

$apiContext = new \PayPal\Rest\ApiContext(
    new \PayPal\Auth\OAuthTokenCredential(
        'YOUR_CLIENT_ID',     // 替换为您的客户端ID
        'YOUR_CLIENT_SECRET'  // 替换为您的客户端密钥
    )
);

$apiContext->setConfig([
    'mode' => 'sandbox',  // 设置为'sandbox'进行测试，'live'用于生产环境
]);

$payer = new Payer();
$payer->setPaymentMethod('paypal');

$amount = new Amount();
$amount->setTotal('10.00');  // 设置汇款金额
$amount->setCurrency('USD'); // 设置货币类型

$transaction = new Transaction();
$transaction->setAmount($amount);

$redirectUrls = new RedirectUrls();
$redirectUrls->setReturnUrl('http://example.com/success') // 设置成功后的返回URL
    ->setCancelUrl('http://example.com/cancel'); // 设置取消支付后的返回URL

$payment = new Payment();
$payment->setIntent('sale')
    ->setPayer($payer)
    ->setTransactions([$transaction])
    ->setRedirectUrls($redirectUrls);

try {
    $payment->create($apiContext);
    $approvalUrl = $payment->getApprovalLink();
    header("Location: $approvalUrl"); // 重定向用户到PayPal付款页面
} catch (Exception $e) {
    echo $e->getMessage();
}
?>