fastadmin 微信、支付宝支付

//执行支付
    public function wechat($code,$title,$amount,$order)
    {
　　　　 //$code = '';前端传过来
        $openid = '';//用户的openid
        $type = 'wechat';//支付方式
        $method = 'miniapp';//支付类型
        $appid = '';　　　　//平台获取
        $secret = '';　　　　//平台获取
        if ($info = $this->userOpenId(appid,$secret,$code)){
                //用户的openid
                $openid = $info['openid'];
            }

        if ($openid == ''){
            return $this->err('未获取到用户openid');
        }

        if (!$amount || $amount < 0) {
            return $this->err("支付金额必须大于0");
        }

        if (!$type || !in_array($type, ['alipay', 'wechat'])) {
            return $this->err("支付类型不能为空");
        }

        if (in_array($method, ['miniapp', 'mp']) && !$openid) {
            return $this->err("openid不能为空");
        }

        //回调链接
        $notifyurl = $this->request->root(true) . '/addons/epay/index/notifyx/paytype/' . $type;
        $returnurl = $this->request->root(true) . '/addons/epay/index/returnx/paytype/' . $type . '/out_trade_no/' . $order;

        $response = Service::submitOrder('0.01', $order, $type, $title, $notifyurl, $returnurl, $method, $openid);
        $array = json_decode($response,true);
        $array['order'] = $order;

        return $this->succ('成功',$array);
    }    

    //获取用户的openId
    public function userOpenId($appid,$secret,$code)
    {
        $url = "https://api.weixin.qq.com/sns/jscode2session?appid=$appid&secret=$secret&js_code=$code&grant_type=authorization_code";
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)) {
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        $output = curl_exec($curl);
        if (curl_errno($curl)) {
            return false;
        }
        curl_close($curl);
        $data = json_decode($output,true);
        if (isset($data['openid'])){
            return $data;
        }
        return false;
    }