[PHP知识库]PHP微信公众号授权登录

PHP微信公众号授权登录

微信公众号授权登录非常简单只需要几步就可以搞定

第一步：拼接参数获取code值,并指定后面的处理链接

/**
     * 获取公众号code
     */
    public function getCode(){
        $appid = config('app.wechat.AppId');
        $redirect_uri = urlencode('http://www.xxx.com/api/register/weChatRegister');//重定向地址
        $url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx6f8e4dba34f9d941&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect";
        header("Location:" . $url);
    }

第二步：通过code获取用户openid和access_token，然后再根据openid和access_token获取用户信息

public function weChatRegister()
    {
        if (isset($_GET['code'])) {
            // 获取openid和access_token
            $app_id = config('app.wechat.AppId');
            $app_secret = config('app.wechat.AppSecret');
            $code = $_GET['code'];
            // 发送请求，获取用户openid和access_token
            $data = $this->curl('https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . $app_id . '&secret=' . $app_secret . '&code=' . $code . '&grant_type=authorization_code');
            $data = json_decode($data);
            // 防止第二次访问动态链接报错
            // 判断是否获取到当前用户的openid
            if (isset($data->openid)) {
                $open_id = $data->openid;
                $access_token = $data->access_token;
                // 获取当前用户信息
                $user_info = $this->curl('https://api.weixin.qq.com/sns/userinfo?access_token=' . $access_token . '&openid=' . $open_id . '&lang=zh_CN');
                $user_info = json_decode($user_info);
                // 取出用户信息
                /*
                *user_openid :用户openId
                *user_nickname :用户昵称
                *user_sex :性别
                *user_province :省
                *user_city :城市
                *user_headimgurl :用户头像url
                *user_unionid :绑定开放平台后才有这个字段
                */
                $user_openid = $user_info->openid;
                $user_nickname = $user_info->nickname;
                $user_headimgurl = $user_info->headimgurl;
                $user_unionid = $user_info->unionid;
                // 判断用户是否存在
                $userInfo = Users::where(['unionid' => $user_unionid])->find();
                if (empty($userInfo)) {
                	//用户不存在，创建用户
                    $insert['nickname'] = $user_nickname;
                    $insert['avatar'] = $user_headimgurl;
                    $insert['openid'] = $user_openid;
                    $insert['unionid'] = $user_unionid;
                    $insert['create_time'] = time();
                    $userId = Db::name('qt_users')->insertGetId($insert);
                    
                }else {
                    //用户已经存在进行登录操作或者进行用户下一步数据绑定和认证等
                    
                }
            }else{
                $this->result('无效的请求',$data,204);
            }
        }else{
            $this->result('无效的请求','',204);
        }

    }

curl请求方法

// php CURL请求
    public function curl($url, $post = false)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        if ($post) {
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        }
        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
    }