Laravel无法共享子域cookie

Question

I have Laravel 5.6 project, and I have main domain example.com and many sub-domains by language: en.example.com, de.example.com...

When I am using this function to login user: Auth::login($user, true), it's saving user token in cookie, the problem it's saving only in my current sub-domain en.example.com and when i change URL to de.example.com I don't have this cookie.

I need this cookie to be shared between all the sub-domains and the main-domain.

I tried some solutions, but no one succeed.

• Change session.cookie_domain in php.ini and with ini_set function

  ini_set('session.cookie_domain', ".example.com");

• Change domain in config/session.php

  from:
  'domain' => env('SESSION_DOMAIN', null),
  to:
  'domain' => '*.example.com',

• And the worst problem, that I am not sure why it happens, is that I tried to set cookie with .example.com domain and it didn't work!

  \Cookie::queue('Test', 'Test', time()+60*60*24*365*5, '/', '.example.com');
  and
  setcookie('Test', 'Test', time()+60*60*24*365*5, '/', '.example.com');