Codeigniter - 更改“cookie_domain”后无法重新登录

Question

My Codeigniter's sessions used the default value

$config['cookie_domain'] = "";

But now I need to be able to use CodeIgniter's sessions from domain.com on

• subdomain1.domain.com
• subdomain2.domain.com

So I saw in the codeigniter manual that you can set

$config['cookie_domain'] = ".domain.com";

And the extra dot will make all the ci_sessions shared by the domain and subdomains. This works perfect!

However, it is impossible to log back in the system after changing cookie_domain from "" to ".domain.com" unless I manually delete the cookie ci_session in the chrome settings.

I can't ask all the users to delete their cookies so I need to find a way. I tried all of this:

delete_cookie('ci_session');
setcookie('ci_session', '', time()-3600);
$this->session->sess_destroy();
unset($this->session->userdata);
$this->session->unset_userdata( <array with all the session keys> )
foreach ($_COOKIE as $key=>$cookie)
setcookie($key, '', time() - 9999999);

Some useful info maybe, sess_expiration is set to 2 weeks, this is why I tried a huge number in the setcookie function:

$config['sess_expiration']      = 1209600; // 2 weeks

Also, after all these commands to make the cookie expired. Chrome still says that the ci_session cookie expires in 2 weeks. It's as if it was completely oblivious to the function setcookie

Answer 1

Change your current $config[sess_cookie_name] from ci_session - to something else like new_cookie

Then the browser will look for the new_cookie name, which wont exist - and thus force a new cookie on all your users