支付宝最新接口对接php5.5+

下面以手机网站支付为例：

可先下载最新的支付宝对接 SDK https://docs.open.alipay.com/203/105910/
需 php5.5 以上环境。网站应用环境也必须要是 php5.5 以上。

下载后直接放入\ThinkPHP\Library\Vendor\Alipay 中。特别注意的是密钥的生成 https://docs.open.alipay.com/common/104740
利用工具生成的公钥和查看的公钥是不一样的，需要特别注意。

新建支付服务类文件\Service\AlipayService.class.php

<?php
namespace Home\Service;

class AlipayService {
    /**
     * 支付宝配置信息
     * 本使用包为最新SDK。php5.5+才支持
     * 采用的RSA2加密方式（支付宝推荐），到https://docs.open.alipay.com/291/105971/去下载windows工具，生成公钥和私钥，将公钥在控制台上传设置，再查看其公钥填入以下公钥信息
     */
    function __construct() {
        $payConfig = array(
            'app_id' => D('Config')->get('alipay_partner'), //应用ID,你的APPID。2017071907816658
            'merchant_private_key' => '', //应用私钥，你的原始格式RSA私钥
            'notify_url' => C('PROTOCOL') . $_SERVER['SERVER_NAME'] . U('Pay/alipay_notify_url'), //异步通知地址
            'return_url' => C('PROTOCOL') . $_SERVER['SERVER_NAME'] . U('Pay/alipay_notify_url'), //同步跳转
            'charset' => 'UTF-8', //编码格式
            'sign_type' => 'RSA2', //签名方式
            'gatewayUrl' => 'https://openapi.alipay.com/gateway.do', //支付宝网关
            'alipay_public_key' => '', //支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。设置和支付是两套内容。设置后学要到管理平台去查看应用公钥
            'pay_log_txt' => __ROOT__ . '/Public/alipay_log_bef74b0ac451f8e6e5301453f947499899.txt', //支付日志(需要先建立此文件)
        );
        $this->payConfig = $payConfig;
    }

    /**
     * 获取支付宝配置参数
     * @return array
     */
    public function getConfig() {
        return $this->payConfig;
    }

    /**
     * 设置支付配置参数
     * @param $data
     */
    public function setConfig($data) {
        $payConfig = $this->payConfig;
        foreach ($data as $k => $v) {
            $payConfig[$k] = $v;
        }
        $this->payConfig = $payConfig;
    }

    /**
     * 支付宝支付
     * @param $data
     */
    public function pay($data) {
        Vendor('Alipay.wappay.service.AlipayTradeService');
        Vendor('Alipay.wappay.buildermodel.AlipayTradeWapPayContentBuilder');
        $config = $this->payConfig;
        $out_trade_no = $data['out_trade_no']; //商户订单号，商户网站订单系统中唯一订单号，必填
        $subject = $data['subject']; //订单名称，必填
        $total_amount = $data['total_amount']; //付款金额，必填
        $body = $data['body']; //商品描述，可空
        $timeout_express = "1m"; //超时时间
        $payRequestBuilder = new \AlipayTradeWapPayContentBuilder();
        $payRequestBuilder->setBody($body);
        $payRequestBuilder->setSubject($subject);
        $payRequestBuilder->setOutTradeNo($out_trade_no);
        $payRequestBuilder->setTotalAmount($total_amount);
        $payRequestBuilder->setTimeExpress($timeout_express);
        $payResponse = new \AlipayTradeService($config);
        $result = $payResponse->wapPay($payRequestBuilder, $config['return_url'], $config['notify_url']);
    }

    /**
     * 记录支付异步记录
     * @param $data
     */
    public function setPaylog($data) {
        $config = $this->payConfig;
        $str = serialize($data) . "\r\n==================================================================================\r\n";;
        import("Org.Util.File");
        $file = new \File($config['pay_log_txt']);
        $realfiel = $file->getRealFile();
        file_put_contents($realfiel, $str, FILE_APPEND);
    }
}

支付处理控制器

<?php
namespace Home\Controller;

use Think\Controller;
use Common\Controller\HomeController;

class PayController extends HomeController {
    /**
     * 支付宝支付
     * @param $order_number 订单号
     */
    public function alipay($order_number) {
        $order = D('Order')->where(array('order_number' => $order_number))->find();
        $orderDetail = D('OrderDetail')->where(array('oid' => $order['id']))->field('pid')->select();
        $firstProduct = D('Products')->where(array('id' => $orderDetail[0]['pid']))->field('title')->find();
        //支付数据
        $payData = array(
            'out_trade_no' => $order['order_number'],
            'subject' => D('Config')->get('alipay_subject') . $order_number, //支付主题
            'total_amount' => 0.01, //测试订单号0.01元支付$order['real_all_money']
            'body' => $firstProduct['title'] . '等',
        );
        D('Alipay', 'Service')->pay($payData);
    }

    /**
     * 支付宝回调地址
     */
    public function alipay_notify_url() {
        //记录日志，这里最好放在开头以防下面代码逻辑有误不能正常发现是否被调用
        D('Alipay', 'Service')->setPaylog($logArr);

        Vendor('Alipay.wappay.service.AlipayTradeService');
        $payConfig = D('Alipay', 'Service')->getConfig();
        $arr = $_POST;
        $logArr = $arr;
        $alipaySevice = new \AlipayTradeService($payConfig);
        $alipaySevice->writeLog(var_export($_POST, true));
        $result = $alipaySevice->check($arr);
        if ($result) {
            //验证成功
            $out_trade_no = $_POST['out_trade_no']; //商户订单号
            $trade_no = $_POST['trade_no']; //支付宝交易号
            $trade_status = $_POST['trade_status']; //交易状态
            if ($_POST['trade_status'] == 'TRADE_FINISHED') {
                //交易结束，不可退款
            } else if ($_POST['trade_status'] == 'TRADE_SUCCESS') {
                //交易支付成功
                $re = D('Order')->setPay($out_trade_no, 1);
            }
            echo "success"; //请不要修改或删除
            $logArr['result'] = "success";
        } else {
            //验证失败
            echo "fail"; //请不要修改或删除
            $logArr['result'] = "fail";
        }
    }

    /**
     * 支付成功跳转地址
     */
    public function resultinfo() {
        $ModelObj = D('Order');
        $order_number = I('out_trade_no');
        $order = $ModelObj->where(array('order_number' => $order_number))->find();
        $this->order = $order;
        $this->display('pay_ok');
    }
}