maintain/wxbx/application/index/controller/AdminWeixinLogin.php

<?php
namespace app\index\controller;
use think\Db;
/**
 * 后台微信登录
 * Created by PhpStorm.
 * User: Titan 名字就是密码
 * Date: 2019/5/5
 * Time: 17:21
 */
class AdminWeixinLogin extends \think\Controller
{
    private $appid =APPID;
    private $appsecret=APPSECRET;

    public function index()
    {
        if(isset($_GET['code'])){
         
           $code = $_GET['code'];
            $state = $_GET['state'];
          	if(time()-$_GET['time']>120){//判断二维码失效
                $this->assign('isauth','hasexpire');
            	return view();           	           
            }
          //获取openid
            $url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=".$this->appid."&secret=$this->appsecret&code=$code&grant_type=authorization_code";
            $info = json_decode($this->https_request($url), true);
          	$openid = $info['openid'];
          	if(!$openid){
              	$this->assign('isauth','err');
            	return view();
              
				          
            }
          	//查看是否绑定管理员
            $admin = \think\Db::name('admin')->where(['openid'=>$info["openid"],'status'=>0])->find();
         	
            if(!$admin){
              	$this->assign('isauth','nobind');
            	return  view();         	
            }
           //记录状态用于后台登录轮询
          	$login_id = Db::name('login')->where(['openid'=>$openid,'uid'=>$admin['id']])->value('id');
          		
          	if(!$login_id){
            	$res = Db::name('login')->insert(['openid'=>$openid,'uid'=>$admin['id'],'code'=>$state,'create_time'=>time()]);
              
            }else{
            	$res = Db::name('login')->where('id',$login_id)->setField('code',$state);
            }
        
          	if($res){          
              	$this->assign('isauth','suss');
         		return view();
            }
        }else{
           	$this->assign('isauth','err');
            	return view();
        }
    }

    public function https_request($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;
    }
}