Sharing SESSION Between Multiple Subdomains

I'm using session like bellow in my CI app on a domain (i.e. domain.com)-

PHP Code:

$set['x'] = $id;
$set['y'] = $name;
$set['z'] = $lavel;
$this->session->set_userdata($set); 


Now I want to use these session variables on a subdomain (i.e. sub.domain.com). How to do that..? Is there any option in CI to do that?

Thank you in advance.

Hi webdevron,

I think you can do that in config.php

Look for these entries.
$config['encryption_key'] = 'encryption';
$config['sess_cookie_name'] = 'sess_cookie_name';

and make it the same to your codeigniter config.php in each of your subdomain.

That will work.

Thanks.

That's obvious (even if encryption_key is only relevant for CI2), but the important part is to set cookie_domain to the top-level domain (e.g. domain.com), which allows all its subdomains (sub1.domain.com, sub2.domain.com, etc.) to receive the cookie.