ThinkPHP5.0 实现 app支付宝支付功能

<?php
namespace app\mobile\controller;
use app\mobile\model\Goods;
use app\mobile\model\OrderGoods;
use think\Controller;

class Pay extends Controller
{
    public function pay_order()
    {
        $res = new OrderGoods();
        //获取订单号
        $where['id'] = input('post.order_sn');
        $reoderSn = input('post.order_sn');
        //查询订单信息
        $order_info = $res->where($where)->find();
        //获取支付方式
        $pay_type = input('post.pay_type');//微信支付 或者支付宝支付
        //获取支付金额
        $money = input('post.totle_sum');
        //判断支付方式
        switch ($pay_type) {
            case 'ali';//如果支付方式为支付宝支付

                //更新支付方式为支付宝
                $type['pay_type'] = 'ali';
                $res->where($where)->update($type);

                //实例化alipay类
                $ali = new Alipay(); 

                //异步回调地址
                $url = 'XXXXXXXXXXXXXXXXXX/Callback/aliPayBack';

                $array = $ali->alipay('商品名称', $money,$reoderSn,  $url);

                if ($array) {
                    return $array;
                } else {
                    echo json_encode(array('status' => 0, 'msg' => '对不起请检查相关参数!@'));
                }
                break;
            case 'wx';

                break;
        }
    }
}

class AliPay extends Controller
{

    protected $appId = '';//支付宝AppId
    protected $rsaPrivateKey = '';//支付宝私钥
    protected $aliPayRsaPublicKey = '';//支付宝公钥
    private $seller = '';

    /*
     * 支付宝支付
     */
    public function aliPay($body, $total_amount, $product_code, $notify_url)
    {
        /**
         * 调用支付宝接口。
         */
        /*import('.Alipay.aop.AopClient', '', '.php');
        import('.Alipay.aop.request.AlipayTradeAppPayRequest', '', '.php');*/
        Loader::import('Alipay\aop\AopClient', EXTEND_PATH);
        Loader::import('Alipay\aop\request\AlipayTradeAppPayRequest', EXTEND_PATH);

        $aop = new \AopClient();

        $aop->gatewayUrl = "https://openapi.alipay.com/gateway.do";
        $aop->appId = $this->appId;
        $aop->rsaPrivateKey = $this->rsaPrivateKey;
        $aop->format = "json";
        $aop->charset = "UTF-8";
        $aop->signType = "RSA2";
        $aop->alipayrsaPublicKey = $this->aliPayRsaPublicKey;
        $request = new \AlipayTradeAppPayRequest();
        $arr['body'] = $body;
        $arr['subject'] = $body;
        $arr['out_trade_no'] = $product_code;
        $arr['timeout_express'] = '30m';
        $arr['total_amount'] = floatval($total_amount);
        $arr['product_code'] = 'QUICK_MSECURITY_PAY';

        $json = json_encode($arr);
        $request->setNotifyUrl($notify_url);
        $request->setBizContent($json);

        $response = $aop->sdkExecute($request);
        return $response;

    }


    function createLinkstring($para)
    {
        $arg = "";
        while (list ($key, $val) = each($para)) {
            $arg .= $key . "=" . $val . "&";
        }
        //去掉最后一个&字符
        $arg = substr($arg, 0, count($arg) - 2);

        //如果存在转义字符，那么去掉转义
        if (get_magic_quotes_gpc()) {
            $arg = stripslashes($arg);
        }

        return $arg;
    }


    function argSort($para)
    {
        ksort($para);
        reset($para);
        return $para;
    }
}

<?php
namespace app\mobile\controller;
use app\mobile\model\OrderGoods;
use app\mobile\model\IntegralRecord;
use app\admin\model\SystemSettings;
use app\mobile\model\Members;
use think\Controller;
use think\Request;
use think\Db;

class Callback extends Controller
{
    /*
     * 支付宝支付回调修改订单状态
     */
    public function aliPayBack()
    {

        if ($_POST['trade_status'] == 'TRADE_SUCCESS') {//如果支付成功
            //===============修改订单状态===========================//
            $order = new OrderGoods();//实例化
            $orderSn = $_POST['out_trade_no'];//获取订单号
                $where['order_sn'] = $orderSn;
                $data1['type'] = 2;
            $order->where($where)->update($data1);//修改订单状态
            echo 'success';
            exit;
        }
    }
}