Session for creating a unique shopping cart for each user

From: Tore E. Mackay (tore_at_temweb.net)
Date: 10/31/03 

To: php-general@lists.php.net
Date: Fri, 31 Oct 2003 15:47:13 +0100

Hi,

I am creating a shopping cart but experiensing some difficulty in creating
unique shopping carts for each user. When I try to create a session I get
this error message:
Warning: session_start(): Cannot send session cookie - headers already sent

This is the code:
if(isset($_COOKIE["cartId"]))
{
return $_COOKIE["cartId"];
}
else
{
session_start();
session_register("cartId", session_id(), time() + ((3600 * 24) * 30));
return session_id();
}

If I remove the session_start() and session_register it works fine, but then
everyone uses the same cart and that can't be good.

Thanx!!!

Regards
Tore

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