Wordpress session management

Question

I'm putting up a site using Wordpress and I'd like to piggyback on its sessions. But I'm not finding any plugins, or even documentation. Any suggestions or references before I start hacking it?

Note: I'm asking about if and how WP uses standard PHP sessions itself, not how to add PHP sessions e.g. using session_start(). Apparently any state WP maintains is accomplished by other means. So if I want to use PHP sessions I need to add and maintain it myself entirely, using techniques like those in the thread.

Thanks all!

Answer 1

It's a very bad idea to modify WP Core files for the ability to use sessions. The best way I've found is to call the session_start() from init action hook.

function kana_init_session() {
  session_start();
}

add_action('init', 'kana_init_session', 1);

You can place it in functions.php file of your theme.

Detailed article can be found here: http://www.kanasolution.com/2011/01/session-variable-in-wordpress/