"single sign-on" with another system sharing users table

I'm building a system to be run parallell with an OpenCart installation and want the two systems to be "single sign-on".

• They share the database and both systems uses the OpenCart installation customer table for its users (users in this case are what opencart call customers, not the administrator users).
• My system only checks the customer_id $_SESSION variable to autorize users
• My system sets these $_SESSION variables at login: language, currency, country_id, zone_id, cart and customer_id
• I use the following lines when I start a session in the other system:

  Code: Select all

  if (!session_id()) {
    ini_set('session.use_cookies', 'On');
    ini_set('session.use_trans_sid', 'Off');
    session_set_cookie_params(0, '/');
    session_start();
  }

When I log in to OpenCart I get logged in to both systems, just as I want it, but when I log in to the other system I dont get logged in to OpenCart. What am I missing? I'd be very greatfull for any help!

Nevermind, seems that the steps described above where all that was needed. Don't know why I didn't see it working yesterday, but today, just picking up where I left, it seems to work alright.