How to continue session called from remote server?

[A1es]

session_start() does not keep alive current session if it's controled from remote server;
It works if it's all on the same server.
How can I 'set-up' session, to continue started session on remote server?
Tried this, but doesn't works:
ini_set('session.cookie_domain ', '.anotherserver.com');
ini_set('session.referer_check','anotherserver');

Example:
If I have www.myserver.com/session.php and in the script: session_start();

a) session continues on the same server;

For example: www.myserver.com/test.html
and inside: <a href="http://www.myserver.com/session.php?add=1">+1</a>
<a href="http://www.myserver.com/session.php?add=2">+2</a>

If I click on '+1' or '+2' session continues and value from add
variable is added to session variable:

b) session DOES NOT continue if I click the same test.html on another server:
for example: www.anotherserver.com/test.html
Each time you click the new session is created;

It's assumed like a new client clicked, but in fact it's the same client.

Can I solve this problem without programming my own session managment?
Anyone knows a simple solution?

A1es

[swr]

The session ID is stored in a cookie. Cookies are not cross-domain. When the user goes to another server, their browser won't provide the session cookie they were using on the other domain, so PHP doesn't know what session to load.

You need to use a mechanism other than cookies to pass the session ID. This may work, though I haven't tested it:

echo '<a href="http://www.anotherserver.com/test.html?PHPSESSID='.session_id().'">Another server</a>';

When a user arrives on the site like that, you should use [man]session_regenerate_id[/man] to block session fixation attacks.