php oauth2 微信授权登录

<?php

    /* 返回数据 md5(uniqid(rand(), TRUE))

    openid     用户的唯一标识

    nickname     用户昵称

    sex     用户的性别，值为1时是男性，值为2时是女性，值为0时是未知

    province     用户个人资料填写的省份

    city     普通用户个人资料填写的城市

    country     国家，如中国为CN

    headimgurl     用户头像，最后一个数值代表正方形头像大小（有0、46、64、96、132数值可选，0代表640*640正方形头像），用户没有头像时该项为空

    privilege     用户特权信息，json 数组，如微信沃卡用户为（chinaunicom）

    unionid     只有在用户将公众号绑定到微信开放平台帐号后，才会出现该字段。详见：获取用户个人信息（UnionID机制）

    */

class controller_chat {

    

    protected $access_token = ""; // 初始化为空

    protected $appid        = "";                   // 申请是微信官方给的appid

    protected $appsecret    = "";     // 申请时微信官方给的secrect

    protected $callback     = '';  // 回调地址(域名即可)

    // 登录接口

    public function ChatLogin() {

        session_start();

        $state = md5(uniqid(rand(), TRUE));

        $_SESSION["wx_state"] = $state; //存到SESSION

        $callback = urlencode($this->callback);

        //var_dump($callback,$_SESSION);exit();

        // 获取code

        $wxurl = "https://open.weixin.qq.com/connect/qrconnect?appid=" . $this->appid

                . "&redirect_uri={$callback}&response_type=code&scope=snsapi_login&state={$state}#wechat_redirect";

        header("Location: $wxurl");

    }

    

    // 具体回调地址

    public function oauth2() {

        if ($_GET['state'] != $_SESSION["wx_state"]) {

            echo '5001：非法登录<br/>';

            exit();

        }

        // 获取Access Token

        $clienturl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" . $this->appid

                . "&secret=" . $this->appsecret;

        $client = $this->https_request($clienturl);

        $result = json_decode($client, true);

        $this->access_token = $result["access_token"];

        

        if (isset($_GET['code'])) {

            $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" . $this->appid

                    . "&secret=" . $this->appsecret . "&code=" . $_GET['code'] . "&grant_type=authorization_code";

            $res = $this->https_request($url);

            $res = (json_decode($res, true));

            $row = $this->get_user_info($res['openid']);

            if ($row['openid']) {

                cookie('weixin', $row, 86400);

                

                $this->display('main/index.html');

            } else {

                $this->error($row['errmsg']);

            }

        } else {

            $this->error('授权出错,请重新授权!');

        }

    }

    //获取用户基本信息

    public function get_user_info($openid) {

        $url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=" . $this->access_token . "&openid=" . $openid . "&lang=zh_CN";

        $res = $this->https_request($url);

        return json_decode($res, true);

    }

    //https请求

    public function https_request($url) {

        $curl = curl_init();

        curl_setopt($curl, CURLOPT_URL, $url);

        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

        $output = curl_exec($curl);

        curl_close($curl);

        

        return $output;

    }

}

$chat = new controller_chat();

$chat->ChatLogin();