微信的授权登录

先上代码

/**
    * =========获取微信用户详细信息=====================
    **/
    public function wechatLogin(){
        $param = input('param.');

        //-------配置
        $AppID = 'wxb42ad51501111111';
        $AppSecret = '8b023a4ec3bfb58ecaf1b96b91111111';


        $my_redirect_url = input('param.my_redirect_url');
        $my_redirect_url = base64_encode($my_redirect_url);
        $callback  = 'http://www.j.cn'.url('ydyl/wechatCllBack',['my_redirect_url'=>$my_redirect_url]);


         //微信登录
         //---生成唯一随机串防CSRF攻击
        $state  = md5(uniqid(rand(), TRUE));
        $_SESSION["wx_state"]    =   $state; //存到SESSION snsapi_userinfo snsapi_base
        $callback = urlencode($callback);
        $wxurl = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=".$AppID."&redirect_uri=".$callback."&response_type=code&scope=snsapi_userinfo&state={$state}#wechat_redirect";

        header("Location: $wxurl");

    }
        //微信登录回调函数
    public function wechatCllBack() {


        $AppID = 'wxb42ad51501111111';
        $AppSecret = '8b023a4ec3bfb58ecaf1b96b91111111';


        $url='https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$AppID.'&secret='.$AppSecret.'&code='.$_GET['code'].'&grant_type=authorization_code';
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_URL, $url);
        $json =  curl_exec($ch);
        curl_close($ch);
        $arr=json_decode($json,1);
         //得到 access_token 与 openid

        $url='https://api.weixin.qq.com/sns/userinfo?access_token='.$arr['access_token'].'&openid='.$arr['openid'].'&lang=zh_CN';
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
        curl_setopt($ch, CURLOPT_URL, $url);
        $json =  curl_exec($ch);
        curl_close($ch);
        $arr=json_decode($json,1);
        $this->_login_handle($arr, input('param.my_redirect_url'));

    }
    private function _login_handle($user_info, $redirect_url){

        $user_oauth = Db('ydyl_weixin_user')->where(array("openid"=>$user_info['openid']))->find();
        if(empty($user_oauth)){
            /*二【如果用户不存在】
            * @1添加该用户到users
            */
            $nickname = base64_encode($user_info['nickname']);
            $new_user_data = array(
                'openid' => $user_info['openid'],
                'nickname' => $nickname, //名称
                'sex' => $user_info['sex'],//性别
                'city' => $user_info['city'],//城市
                'province' => $user_info['province'],//省份
                'country' => $user_info['country'], //国家
                'headimgurl' => $user_info['headimgurl'],//头像
                'create_time' => date("Y-m-d H:i:s"),
            );
            $new_user_data['id'] = Db('ydyl_weixin_user')->insertGetId($new_user_data);
            $weixin_user_data = Db('ydyl_weixin_user')->where('id',$new_user_data['id'])->find();
            $user_oauth = $weixin_user_data;
        }
        session('ydyl_weixin_user',$user_oauth);
        $redirect_url = 'http://'.base64_decode($redirect_url);
        header("Location: $redirect_url");

    }

首先要说明,我都是使用URL请求跳转该方法,ajax请求试验过几次,都没成功.(我太弱了)

script里的代码也贴出来好了

<script>

            $.post('http://www.juplus.cn/vdma/index/ydyl/is_Login', {}, function(data) {
                console.log(data)
                var code_ = data.code
                if(!code_){
                    window.location.href = 'http://www.j.cn/vdma/index/ydyl/wechatLogin&my_redirect_url=www.j.cn/br/index.html'
                }
            });

</script>

微信的授权登录一般分三步

第一步:

　　请求授权

　　①获取需要跳转的URL,详见代码$my_redirect_url

　　②$callback是回调函数的路径,记得把$my_redirect_url传递下去($callback的路径是根据项目路径来得,因人而异,我的是tp5框架,所以这样写)

第二步:

　　执行回调函数并存数据库(基本是固定套路,不用改,复制过去就行,最后调用_login_handle()方法时,第二个实参就是跳转URL)

　　①存数据库时改改表明就可以了,字段名不用改.

)

第三步:

　　跳转到初始请求页面

差不多就这样了

有写错的请私信我,谢谢