public function getUserDetail(){
        //获取code
        $appId=$this->_appID;
        $redirectUrl='http://www.wangying.online/wxtest/index.php?s=Home/Index/getUserInfo';
        $url='https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$appId.'&redirect_uri='.$redirectUrl.'&response_type=code&scope=snsapi_userinfo&state=123#wechat_redirect';
        header('location:'.$url);
    }
    //获取用户详细信息
    public function getUserInfo() {
        $appId=$this->_appID;
        $appSecret=$this->_appsecret;
        $code=$_GET['code'];
        //var_dump($code);exit;
        $url='https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appId.'&secret='.$appSecret.'&code='.$code.'&grant_type=authorization_code ';
        $res=$this->http_curl($url,'get');
        var_dump($res);
        $access_token=$res['access_token'];
        $openid=$res['openid'];
        $url='https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';
        $res=$this->http_curl($url);
        var_dump($res); 
    }