微信公众号登录

/**
     * 登录二维码
     */
    public function qrcode()
    {
        //生成数据
        $dataInfo = [
            'ticket' => '',
            'is_login' => 0,
            'user_id' => 0,
            'createtime' => time(),
            'updatetime' => time()
        ];
        $xh_ticket_id = $this->addOne('xh_ticket', $dataInfo);
        if ($xh_ticket_id !== false) {
            try {
                $url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=" . $this->getAccessToken();
                $datawx = [
                    "expire_seconds" => 604800,
                    "action_name" => "QR_SCENE",
                    "action_info" => [
                        "scene" => [
                            "scene_id" => $xh_ticket_id
                        ]
                    ]
                ];
                $result = $this->https_post($url, json_encode($datawx));
                $jsonwx = json_decode($result, true);
                if ($jsonwx) {
                    //更新
                    $ticket = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=" . urlencode($jsonwx['ticket']);
                    $this->saveData('xh_ticket', ['id' => $xh_ticket_id], ['ticket' => $jsonwx['ticket'], 'updatetime' => time()]);
                    $res = ["scene_id" => $xh_ticket_id, "ticket" => $ticket];
                    exit(json_encode(["data" => $res, "code" => 1]));
                } else {
                    $this->result([], 0, '登录获取二维码失败1');
                }
            } catch (\Exception $e) {
                $this->result([], 0, '登录获取二维码失败2');
            }
            $this->result([], 0, '登录获取二维码失败3');
        } else {
            $this->result([], 0, '登录获取二维码失败4');
        }
    }

/**
     * POST方法
     */
    public function https_post($url, $data = null)
    {
        $curl = curl_init();
        curl_setopt($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);
        curl_close($curl);
        return $output;
    }

 /**
     * 登录轮询
     */
    public function login()
    {
        if ($this->request->isPost()) {
            $param = $this->request->param();
            if (empty($param['scene_id'])) {
                $this->result([], 0, 'scene_id错误');
            }
            $xh_ticket = $this->getOne('xh_ticket', ['id' => $param['scene_id'], 'is_login' => 1, 'deletetime' => null]);
            if ($xh_ticket) {
                //登录成功
                session('user_id', $xh_ticket['user_id']);
                $this->result([], 2, '登录成功');
            } else {
                $this->result([], 1, '登录中');
            }
        }
    }

/**
     * 公众号
     * 获取AccessToken
     */
    public function getAccessToken()
    {
        $data = json_decode(file_get_contents("access_token.json"));

        if (!$data || $data->expire_time < time()) {

            $appid = $this->appid;
            $secret = $this->appsecret;
            $url = str_replace("##APPID##", $appid, "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=##APPID##&secret=##APPSECRET##");
            $url = str_replace("##APPSECRET##", $secret, $url);
            $html = file_get_contents($url);
            $output = json_decode($html, true);
            $access_token = $output['access_token'];
            if ($access_token) {
                $data = new \stdClass();
                $data->expire_time = time() + 7000;
                $data->access_token = $access_token;
                $fp = fopen("access_token.json", "w");
                fwrite($fp, json_encode($data));
                fclose($fp);
            }
        } else {
            $access_token = $data->access_token;
        }
        return $access_token;
    }

CREATE TABLE `n_xh_ticket` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `ticket` varchar(255) NOT NULL DEFAULT '' COMMENT '船票',
  `is_login` tinyint(1) unsigned NOT NULL DEFAULT '0' COMMENT '登录状态：0未登录，1已登录',
  `user_id` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '登录用户UID',
  `createtime` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '创建时间',
  `updatetime` int(10) NOT NULL DEFAULT '0' COMMENT '更新时间',
  `deletetime` int(10) DEFAULT NULL COMMENT '删除时间',
  PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=26 DEFAULT CHARSET=utf8mb4 COMMENT='扫码关注公众号登录';