微信公众号网页授权登录

/**
     *用户授权登录
     */
    public function getOauthRedirect()
    {
        $appid = $this->appid;   //appid
        $callback = '';   //回调地址
        $res = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . $appid . 
'&redirect_uri=' . urlencode($callback) . '&response_type=code&scope=snsapi_userinfo
&state=1&connect_redirect=1#wechat_redirect';
        header("Location:" . $res);
    }

    /**
     * 获取用户信息
     * @param Request $request
     * @return string
     */
    public function getOauthUserinfo(Request $request)
    {
        $code = $request->input('code') ? $request->input('code') : '';    //获取code

        //使用code和appid与秘钥  获取openid和access_token
        $url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . 
$this->appid . '&secret=' . $this->appsecret . '&code=' . $code . '&grant_type=authorization_code';

        $data = file_get_contents($url);  //获取openid
        $data1 = json_decode($data, TRUE);  //转数组
        if(!isset($data1['access_token'])) return jsonReturn(-1,'授权失败');
        $url1 = 'https://api.weixin.qq.com/sns/userinfo?access_token=' .
 $data1['access_token'] . '&openid=' . $data1['openid'];
        $data2 = file_get_contents($url1);  //获取用户信息
        $data3 = json_decode($data2, TRUE);
        $openid = $data3['openid'];
        $nickname = $data3['nickname'];
        $sex = $data3['sex'];

        if ($openid != '' && $nickname != '') {
            $request->session()->put('openid', $openid);
           　　try{
　　　　　　　　　　//逻辑操作
                }catch (Exception $e){
                    return $e->getMessage();
                }
            }else{
                $request->session()->put('member_id', $member['id']);
            }

　　　　　　$target_url =empty(session('target_url')) ? '/web' : session('target_url');

　　　　　　　　header("Location:" . $target_url); //可能会失效 可改用js跳转
　　　　　　　　// echo "

window.location.href=$target_url;";return false;

        } else {
//            $this->getOauthRedirect();
            return jsonReturn(-1,'授权失败');

        }

    }