Learn how to use Codeigniter sessions across sub domains

By admin|Computer, Internet, PHP

Think, you have multiple sub domains and you need to share sessions across all sub domains on Codeigniter (CI).

http://example.com
http://subdomain1.example.com
http://subdomain2.example.com

You need to edit config.php as following.

$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 0;
$config['sess_expire_on_close'] = TRUE;
$config['sess_encrypt_cookie'] = TRUE;
$config['sess_use_database'] = TRUE;
$config['sess_table_name'] = 'ci_sessions';
$config['sess_match_ip'] = TRUE;
$config['sess_match_useragent'] = FALSE;
$config['sess_time_to_update'] = 300000000;


$config['cookie_prefix'] = "example_";
$config['cookie_domain'] = ".example.com";
$config['cookie_path'] = "/";
$config['cookie_secure'] = FALSE;