session variable destroyed
===

I have an issue with login session. Basically the flow is like this:

- user creates account and defines a username;
- user logins using url 'http://[username].website.com'
- (coded in php & mysql, using session cookie)

My problem is: when trying to directly login from the index page 'www.website.com' I don't manage to get my user logged to his URL http://username.website.com

Let say i have opened url "www.example.com" and created a session variable in this url. Now i want to access that session variable in url "test.example.com". How to do that? any solution welcomed

Note: at the top of every php file i have used the below code but my session variable was destroyed and i can't access the session variable in another page. I have also set session.cookie_domain = ".website.com" on "php.ini" file.

    ini_set('session.cookie_domain', '.website.com');

    session_name("sessionid"); session_start();