thinkphp使用paypal进行支付的做法详细步骤

1.登录paypal官网注册账户：https://www.paypal.com （根据自己的需求选择对应的类型）

2.前往paypal开发者平台https://developer.paypal.com/ 进行创建应用（建议使用谷歌浏览器，有个自带的翻译功能）：

默认会生成一个个人和商家的账户：

3.前往 https://github.com/paypal/PayPal-PHP-SDK 下载Paypal SDK，我只用 lib 里面的 PayPal，把PayPal 文件夹移动到 tp5 根目录extend 里面

4.在控制器里面：

<?php
namespace app\index\controller;
use think\Controller;
class Pay extends Controller
{
    public function index()
    {
        $apiContext = new \PayPal\Rest\ApiContext(
                new \PayPal\Auth\OAuthTokenCredential(
                    'AX3W0IBtYR5kZYLMi7C1c1N3pw-IskAjzUcMQ1yPpLsOtx3XyGyqt-8a1HQnNCV4yhqUY4SQfzZIQlPA1',
                    'EGU60KWNx63LMNl0IHmmejAUSCmWu4IxtStqHVCp5TkWJT7wU9nzkYaixbuAC0DXIqapISfMz14a1PWd1'
                  //  'AYQ34DFba39JOpZMu4i9eWy6ywOQd4PrtDl08J-inDofww_kijPZ0MDnGO5G1JPjnRaKapQtZGrwiiwe2',
                  //  'EPw-_9yEgYJBwYYH2UNsDqkOa7zZh9mfl3jZygaw5GUaUTU50Gt9D9toE4GsMnLs9NMdbkMsXRT2YEiW2'
                  //   'ASB5bpbbpPTz8fgiL-an9xjVM3q0V0e_jprRozVgEhyJFqcY6zpn977J8LFlcXyMDJf0XrBdKzYdRTtB2',     // ClientID
                  //  'EO0b3hvD0eseJRYqzrfVspVmsaLj54pXgN3Y8aBoIRtGwGXdGc4qZBmzonOK-HUZHgBnApdx5oH8IIYB3'      // ClientSecret
                )
        );
        /*sandbox 模式*/
        $apiContext->setConfig(array('mode' => 'live'));
 
 
        $payer = new \PayPal\Api\Payer();
        $payer->setPaymentMethod('paypal');
 
        $amount = new \PayPal\Api\Amount();
        $amount->setTotal('1.00');
        $amount->setCurrency('USD');
 
        $transaction = new \PayPal\Api\Transaction();
        $transaction->setAmount($amount);
 
        $redirectUrls = new \PayPal\Api\RedirectUrls();
        $sn=time();
        $redirectUrls->setReturnUrl("https://mccj.wyzdjg.top/index/pay/Index/returnUrl/sn/".$sn)
            ->setCancelUrl("https://mccj.wyzdjg.top/index/pay/Index/cancelUrl/sn/".$sn);
 
        $payment = new \PayPal\Api\Payment();
        $payment->setIntent('sale')
            ->setPayer($payer)
            ->setTransactions(array($transaction))
            ->setRedirectUrls($redirectUrls);
 
        try {
            $payment->create($apiContext);
            echo $url=$payment->getApprovalLink();
            echo "<br><a href='".$url."'>点击支付</a>\n";
        }
        catch (\PayPal\Exception\PayPalConnectionException $ex) {
            echo $ex->getData();
        }
    }
 
    public function returnUrl(){
        $apiContext = new \PayPal\Rest\ApiContext(
                new \PayPal\Auth\OAuthTokenCredential(
                        'AYQ34DFba39JOpZMu4i9eWy6ywOQd4PrtDl08J-inDofww_kijPZ0MDnGO5G1JPjnRaKapQtZGrwiiwe1',
                    'EPw-_9yEgYJBwYYH2UNsDqkOa7zZh9mfl3jZygaw5GUaUTU50Gt9D9toE4GsMnLs9NMdbkMsXRT2YEiW1'
                )
        );
        /*sandbox 模式*/
        $apiContext->setConfig(array('mode' => 'sandbox'));
 
 
        // Get payment object by passing paymentId
        $paymentId = $this->request->param('paymentId');
        $payment = new \PayPal\Api\Payment();
        $payment = $payment->get($paymentId, $apiContext);
        $payerId = $this->request->param('PayerID');
 
        // Execute payment with payer ID
        $execution = new \PayPal\Api\PaymentExecution();
        $execution->setPayerId($payerId);
 
        try {
            // Execute payment
            $result = $payment->execute($execution, $apiContext);
            if ($result && isset ( $result->state ) && $result->state == 'approved') {
                echo "支付成功";
            }else{
                echo "支付失败";
                var_dump($result);
            }
        } catch (PayPal\Exception\PayPalConnectionException $ex) {
          echo $ex->getCode();
          echo $ex->getData();
          die($ex);
        } catch (Exception $ex) {
          die($ex);
        }
    }
    public function cancelUrl(){
        echo '取消支付';
    }
}