Thinkphp5 使用Paypal 支付

1，首先前往官网https://www.paypal.com 创建一个账户，我创建的是一个企业账户

2，前往paypal开发者平台https://developer.paypal.com/ 进行创建应用（使用谷歌自带的翻译，把网页翻译过来....）

3，点击之后出现如下界面，沙盒开发人员帐户是在创建账号的时候默认生成的两个账号其中一个企业账号，还有一个是个人账号，供测试使用的，还可以多创建几个。

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，放到这里就不需要动了。

4，之后我创建了一个控制器，点击支付则调用

代码：

<?phpnamespace app\home\controller;use PayPal\Api\Payer;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Details;
use PayPal\Api\Amount;
use PayPal\Api\Transaction;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Payment;
use PayPal\Auth\OAuthTokenCredential;
use PayPal\Exception\PayPalConnectionException;
use PayPal\Rest\ApiContext;
use PayPal\Api\PaymentExecution;
use Think\DB;class Paypal
{   // sandbox 开发环境// const clientId = 'xxxxxxxxxx';// const clientSecret = 'xxxxxxxx';// live 生产环境const clientId = 'xxxxxxxxxx';const clientSecret = 'xxxxxxxxxxxxxx';const accept_url = 'https://baidu.com';//返回地址const Currency = 'USD'; //币种 美元protected $PayPal;protected $order_number;public function __construct(){$this->PayPal = new ApiContext(new OAuthTokenCredential(self::clientId,self::clientSecret));//如果是沙盒测试环境不设置，请注释掉// $this->PayPal->setConfig(//     array(//         'mode' => 'live',//     )// );}public function index(){// 这里可以把数据传过来，也可以查出来// code ....// 商品名称$product = '商品商品';if (empty($product)) {$this->error('Goods cannot be empty.');}// 总价$price = '100';if (empty($price)) {$this->error('Prices cannot be empty.');}// 运费 $shipping = input('shipping', 0);// 商品描述$description = '商品描述';if (empty($description)) {$this->error('Description cannot be empty.');}$this->pay($product, $price, $shipping, $description);}/*** @param* $product 商品* $price 价钱* $shipping 运费* $description 描述内容*/public function pay($product, $price, $shipping = 0, $description){$paypal = $this->PayPal;$total = $price + $shipping;//总价$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);$amount = new Amount();$amount->setCurrency(self::Currency)->setTotal($total)->setDetails($details);$transaction = new Transaction();$transaction->setAmount($amount)->setItemList($itemList)->setDescription($description)->setInvoiceNumber(uniqid());$redirectUrls = new RedirectUrls();// $redirectUrls->setReturnUrl(self::accept_url . '?success=true')->setCancelUrl(self::accept_url . '/?success=false');$redirectUrls->setReturnUrl(self::accept_url .'?success=true')->setCancelUrl(self::accept_url .'?success=false');$payment = new Payment();$payment->setIntent('sale')->setPayer($payer)->setRedirectUrls($redirectUrls)->setTransactions([$transaction]);try {$payment->create($paypal);} catch (PayPalConnectionException $e) {echo $e->getData();die();}$approvalUrl = $payment->getApprovalLink();header("Location: {$approvalUrl}");}/*** 回调*/public function Callback(){// 修改订单状态$success = trim($_GET['success']);if ($success == 'false' && !isset($_GET['paymentId']) && !isset($_GET['PayerID'])) {echo "<script>alert('取消支付。');history.go(-4);</script>";exit();}$paymentId = trim($_GET['paymentId']);$PayerID = trim($_GET['PayerID']);if (!isset($success, $paymentId, $PayerID)) {echo 'Failure to pay。';exit();}if ((bool)$_GET['success'] === 'false') {echo 'Failure to pay，payment ID【' . $paymentId . '】,Payer ID【' . $PayerID . '】';exit();}$payment = Payment::get($paymentId, $this->PayPal);$execute = new PaymentExecution();$execute->setPayerId($PayerID);try {$payment->execute($execute, $this->PayPal);} catch (Exception $e) {echo $e . ',支付失败，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】';exit();}// 到这里就支付成功了，可以修改订单状态，需要自己传参数，可以在成功回调地址后面加// code....// 可以跳转订单页面$url = 'http://www.baidu.com';header("Location:$url");die;}
}

代码end;

5，测试 id和key在应用里面，（不知道是我电脑原因还是其他原因，打开自动翻译之后点击显示秘钥没有反应。）