laravel-adminを例として、Laravelのシングルユーザーログインについて詳しく説明します。

if ($this->guard()->attempt($credentials, $remember)) {
     
     // return $this->sendLoginResponse($request);//此注释修改为以下
     return $this->sendLoginResponse($request,$credentials);
}

protected function sendLoginResponse(Request $request,$credentials)
    {
        admin_toastr(trans('admin.login_successful'));
        $request->session()->regenerate();
        // return redirect()->intended($this->redirectPath());
        // 制作 token
         return $this->createtoken($credentials,$request);
        
    }

protected function createtoken($credentials,$request){
           
           //相同局域网下多设备通用token 
           if(!Redis::get('STRING_SINGLETOKEN_MAJOR_'. $credentials['username'])){
               $time = time();
                // 当前 time 存入 Redis
               Redis::set('STRING_SINGLETOKEN_MAJOR_'. $credentials['username'], $time);
           }
           
           //局域网不通用 但设备使用 注释上边多设备使用
           //   $time = time();
           
           $time=Redis::get('STRING_SINGLETOKEN_MAJOR_'. $credentials['username']);
           // md5 加密
           $singleToken = md5($request->getClientIp() . $credentials['username'] . $time .'onlykey');
           Redis::set('SINGLETOKEN_MAJOR_'. $credentials['username'],$singleToken);
           
           // 用户信息存入 Session
           Session::put('user_login', $credentials['username']);
        
        
         return redirect()->intended($this->redirectPath());
    }

// 项目根目录运行
    php artisan make:middleware SsoMiddleware

'SsoMiddleware' => \App\Http\Middleware\SsoMiddleware::class,

public function handle($request, Closure $next)
    {
        $prefix=config('admin.route.prefix');
        $array=['/'.$prefix.'/auth/login','/'.$prefix.'/auth/logout','/'.$prefix.'/auth/clearsession'];
        $username= Session::get('user_login');
        $url=$request->getRequestUri();
        
       
        if(in_array($url,$array)){
        
            return $next($request);
            exit;
        }
       
        
        if ($username) {
            // 获取 Cookie 中的 token
            $singletoken = Redis::get('SINGLETOKEN_MAJOR_'.$username);
            if ($singletoken) {
                // 从 Redis 获取 time
                $redisTime = Redis::get('STRING_SINGLETOKEN_MAJOR_'. $username);
                // 重新获取加密参数加密
                $ip = $request->getClientIp();
                $secret = md5($ip . $username . $redisTime.'onlykey');
                if ($singletoken != $secret) {              
                    // 记录此次异常登录记录
                    // \DB::table('data_login_exception')->insert(['guid' => $userInfo->guid, 'ip' => $ip, 'addtime' => time()]);
                    // 清除 session 数据
                    
                    // abort('404','你可能来到了没有知识的荒漠');
                    // return redirect('/'.$prefix.'/auth/logout');
                    // $request->session()->invalidate();
                    $data = [
                        'message' => '您的帐号在另一个地点登录..！',
                        'url' => '/'.$prefix.'/auth/clearsession',
                        'jumpTime' => 5,
                        'status' => 'error'
                    ];
                    //显示模板及数据
                    return response()-> view('errors/Prompt',compact('data'));
                }
                return $next($request);
            } else {
                return redirect('/'.$prefix.'/auth/logout');
            }
        } else {
            
            return redirect('/'.$prefix.'/auth/logout');
        }
    }

public function clearsession(Request $request){
        $prefix=config('admin.route.prefix');
       return  redirect('/'.$prefix.'/auth/logout');
}

'middleware' => ['web', 'admin','SsoMiddleware'],