paypal支付接口准备工作
首先去申请一个paypal账号，https://www.paypal.com/。
申请完毕并登录，进入https://developer.paypal.com/developer/accounts/。即可看到你申请账号自动配属的两个测试账号，账号类别分别是：BUSINESS和PERSONAL，PERSONAL的账号里面有$9999，测试费用，表激动。
下面去给两个账号设置密码，点击账号展开，然后点击Profile，会弹出账号信息框，里面可以设置密码等一堆属性。如果点击账号始终无法展开，请吐槽下paypal，然后F5再点。
下面进入https://developer.paypal.com/developer/applications/申请APP，点击REST API apps栏目下面的Create App按钮，写进一个APP名称，然后选择一个测试账户作为此APP绑定的账号，如果你在上一步没有申请新的测试账号，那么这里默认就是选择了BUSINESS账号。
然后打开创建的APP，可以看到APP的clientId和clientSecret。
paypal的测试环境域名为sandbox.paypal.com，正式域名为www.paypal.com。一下测试均为测试环境。
至此准备工作差不多了，开始动代码。
PayPal-PHP-SDK下载：https://packagist.org/packages/paypal/rest-api-sdk-php
通过composer（composer安装教程）下载PayPal-PHP-SDK，具体的composer.json如下：
composer require paypal/rest-api-sdk-php
{
"require" : {
"paypal/rest-api-sdk-php" : "1.7.4"
},
"repositories": {
"packagist": {
"type": "composer",
"url": "https://packagist.phpcomposer.com"
}
}
}
shndbox 为沙盒环境配置，live 反之
点击 create account 设置测试帐号金额和密码
PayPal Payments的逻辑大致如下：
创建一个支付，发送到paypal服务端
paypal服务端返回一个用户授权地址
转链到用户授权地址，用户授权
用户授权完毕，paypal返回到客户端设置的execute地址，付款实现。
<?php
namespace app\pay\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 cmf\controller\HomeBaseController;
class PaypalController extends HomeBaseController
{
const clientId = '';//ID
const clientSecret = '';//秘钥
const accept_url = 'http://test.pay.com/PayPal/Callback';//回调地址
const Currency = 'USD';//币种
const error_log = 'PayPal-error.log';//错误日志
const success_log = 'PayPal-success.log';//成功日志
protected $PayPal;
public function __construct()
{
$this->PayPal = new ApiContext(
new OAuthTokenCredential(
self::clientId,
self::clientSecret
)
);
$this->PayPal->setConfig(
array(
'mode' => 'live',
'http.ConnectionTimeOut' => 30,
)
);
}
public function index()
{
$product = input('product');
if (empty($product)) {
return json(['status'=>false,'msg'=>'商品不能为空']);
}
$price = input('price');
if (empty($price)) {
return json(['status'=>false,'msg'=>'价格不能为空']);
}
$shipping = input('shipping', 0);
$description = input('description');
if (empty($description)) {
return json(['status'=>false,'msg'=>'描述内容不能为空']);
}
$this->pay($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');
$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()
{
$success = trim($_GET['success']);
if ($success == 'false' && !isset($_GET['paymentId']) && !isset($_GET['PayerID'])) {
pay_logs(self::error_log, '取消付款');
exit();
}
$paymentId = trim($_GET['paymentId']);
$PayerID = trim($_GET['PayerID']);
if (!isset($success, $paymentId, $PayerID)) {
pay_logs(self::error_log, '支付失败');
exit();
}
if ((bool)$_GET['success'] === 'false') {
pay_logs(self::error_log, '支付失败，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】');
exit();
}
$payment = Payment::get($paymentId, $this->PayPal);
$execute = new PaymentExecution();
$execute->setPayerId($PayerID);
try {
$payment->execute($execute, $this->PayPal);
} catch (Exception $e) {
pay_logs(self::error_log, $e . ',支付失败，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】');
exit();
}
pay_logs(self::success_log, '支付成功，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】');
}
}
/**
* 回调
*/
public function Callback()
{
$success = trim($_GET['success']);
if ($success == 'false' && !isset($_GET['paymentId']) && !isset($_GET['PayerID'])) {
echo '取消付款';die;
}
$paymentId = trim($_GET['paymentId']);
$PayerID = trim($_GET['PayerID']);
if (!isset($success, $paymentId, $PayerID)) {
echo '支付失败';die;
}
if ((bool)$_GET['success'] === 'false') {
echo '支付失败，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】';die;
}
$payment = Payment::get($paymentId, $this->PayPal);
$execute = new PaymentExecution();
$execute->setPayerId($PayerID);
try {
$payment->execute($execute, $this->PayPal);
} catch (Exception $e) {
echo ',支付失败，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】';die;
}
echo '支付成功，支付ID【' . $paymentId . '】,支付人ID【' . $PayerID . '】';die;
}
要先在控制面板设置回调地址，必须为 Https, 设置后要等一会才会生效
public function notify(){
//获取回调结果
$json_data = $this->get_JsonData();
if(!empty($json_data)){
Log::debug("paypal notify info:\r\n".json_encode($json_data));
}else{
Log::debug("paypal notify fail:参加为空");
}
//自己打印$json_data的值看有那些是你业务上用到的
//比如我用到
$data['invoice'] = $json_data['resource']['invoice_number'];
$data['txn_id'] = $json_data['resource']['id'];
$data['total'] = $json_data['resource']['amount']['total'];
$data['status'] = isset($json_data['status'])?$json_data['status']:'';
$data['state'] = $json_data['resource']['state'];
try {
//处理相关业务
} catch (\Exception $e) {
//记录错误日志
Log::error("paypal notify fail:".$e->getMessage());
return "fail";
}
return "success";
}
public function get_JsonData(){
$json = file_get_contents('php://input');
if ($json) {
$json = str_replace("'", '', $json);
$json = json_decode($json,true);
}
return $json;
}
public function returnMoney()
{
try {
$txn_id = "xxxxxxx"; //异步加调中拿到的id
$amt = new Amount();
$amt->setCurrency('USD')
->setTotal('99'); // 退款的费用
$refund = new Refund();
$refund->setAmount($amt);
$sale = new Sale();
$sale->setId($txn_id);
$refundedSale = $sale->refund($refund, $this->PayPal);
} catch (\Exception $e) {
// PayPal无效退款
return json_decode(json_encode(['message' => $e->getMessage(), 'code' => $e->getCode(), 'state' => $e->getMessage()])); // to object
}
// 退款完成
return $refundedSale;
}
支付成为后到测试帐号里查看流水 https://www.sandbox.paypal.com/myaccount/home
Paypal 由于是英文文档查了很多博客结合着文档来做的，下面是
php-sdk 文档的地址：
http://paypal.github.io/PayPal-PHP-SDK/
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