对接paypal支付平台
【前言】:最近公司需要做一款海外股票的app,其中有需要购买会员权益的一个模块，这里需要国际类型的支付。支付宝及微信在国内比较活跃，国外的话可能不太理想，所以就用了paypal.
-
准备工作
1.首先在paypal平台创建账号：https://www.paypal.com/c2/webapps/mpp/account-selection
个人或企业更具自己需求注册对应的账号。
2.在打开此网址创建app及修改默认两个沙箱账号的密码。https://developer.paypal.com/developer/applications创建app选择business.example.com这个账号。
3.api请求示例接口地址：http://paypal.github.io/PayPal-PHP-SDK/sample/
4.可以选择composer或者直接下载zip包，来获取sdk。网上有很多composer安装，这里直接放的是github地址：https://github.com/paypal/PayPal-PHP-SDK/releases -
直接开撸代码
<?php
/*** @author: xusir* @date: 2021/11/24* @createTime: 10:09 上午* @desc:*/
namespace Home\Controller;require_once "Modules/Lib/PayPal-PHP-SDK/autoload.php";use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Transaction;
use PayPal\Api\PaymentExecution;
use PayPal\Exception\PayPalConnectionException;
use PayPal\Rest\ApiContext;
use PayPal\Auth\OAuthTokenCredential;class PayInfoController extends CommonController
{const clientId = '';//app的Client IDconst clientSecret = '';//app的Secretconst Currency = 'USD';//币种public static $accept_url = '';//回调地址protected $PayPal;public function __construct() {self::$accept_url = "http://".$_SERVER['SERVER_NAME'].'/wxapp.php?s=/PayInfo/Callback';//地址$this->PayPal = new ApiContext(new OAuthTokenCredential(self::clientId,self::clientSecret));//设置线上还是沙箱模式$this->PayPal->setConfig([
// 'mode' => 'live','mode' => 'sandbox',]);}/*** @param mixed $arg1* @author xusir* @date: 2021/11/24* @createTime: 1:59 下午* @remark:* $product 商品* $price 价钱* $shipping 运费* $description 描述内容*/public function pay() {$request = I("request.");$interes_id = $request['interes_id'];$price = $request['price'];if(!$request['interes_id'] || !$request['price']){echo json_encode(['code'=>1,'msg'=>'参数不全']);exit;}$shipping = 0;$order = time().rand("1111,9999");//订单号$product = '会员权益';$description = '会员权益';$paypal = $this->PayPal;$total = $price + $shipping;//todo 在paypal下单$payer = new Payer();$payer->setPaymentMethod('paypal');$item = new Item();$item->setName($product)->setCurrency(self::Currency)->setQuantity(1)->setPrice($price);$itemList = new ItemList();$itemList->setItems([$item]);$details = new Details();$details->setShipping($shipping)->setSubtotal($price);//todo paypal账户余额详情$amount = new Amount();$amount->setCurrency(self::Currency)->setTotal($total)->setDetails($details);$transaction = new Transaction();$transaction->setAmount($amount)->setItemList($itemList)->setDescription($description)->setInvoiceNumber(uniqid());//todo 设置回调地址$redirectUrls = new RedirectUrls();$redirectUrls->setReturnUrl(self::$accept_url . "&success=true&orderId=$order&interes_id=$interes_id")->setCancelUrl(self::$accept_url . "&success=false&orderId=$order");$payment = new Payment();$payment->setIntent('sale')->setPayer($payer)->setRedirectUrls($redirectUrls)->setTransactions([$transaction]);//异常获取try {$payment->create($paypal);} catch (PayPalConnectionException $e) {echo json_encode(['code'=>1,'msg'=>$e->getData()]);exit;}//返回paypal授权地址$approvalUrl = $payment->getApprovalLink();echo json_encode(['code'=>0,'msg'=>'success','url'=>$approvalUrl]);exit;}/*** 回调* @param Request $request* @return void*/public function Callback() {$success = trim($_GET['success']);if ($success == 'false' && !isset($_GET['paymentId']) && !isset($_GET['PayerID'])) {echo json_encode(['code'=>1,'msg'=>'支付失败','data'=>"取消付款"]);exit;}$paymentId = trim($_GET['paymentId']);$PayerID = trim($_GET['PayerID']);if (!isset($success, $paymentId, $PayerID)) {echo json_encode(['code'=>1,'msg'=>"支付失败"]);exit;}if ((bool)$_GET['success'] === 'false') {echo json_encode(['code'=>1,'msg'=>'支付失败']);exit;}$payment = Payment::get($paymentId, $this->PayPal);$execute = new PaymentExecution();$execute->setPayerId($PayerID);try {$payment->execute($execute, $this->PayPal);} catch (\Exception $e) {echo json_encode(['code'=>1,'msg'=>$e->getData()]);exit;}//支付成功后业务处理逻辑echo json_encode(['code'=>0,'msg'=>'支付成功']);}}在paypal返回的地址直接web访问就可以进行测试，测试账号填写沙箱的个人账号就可以支付，支付后登录后台就可以看到是否成功付款。
