Common problem, but I'm stumped. Session variables are passing across pages on my local (localhost) deployment, but not on my (www) host. I use a common includes file for each page with this code:

$sessionDomain = "/";
@ini_set("session.cookie_path",$sessionDomain);
$sessionName = "ccSID".md5('/store/');
session_name($sessionName);
session_start();

I confirmed that the session ID cookie (ccSIDxxxxx...) remains the same across pages in my browser, but session variables don't seem to hold up when changing to a page in a different directory.