How to pass users back and forth using session data?
If you will work with sessions, then init this at first in your plugin, theme. add_action( ‘init’, ‘my_start_session’ ); function my_start_session() { if ( session_id() ) return; @session_cache_limiter(‘private, must-revalidate’); //private_no_expire @session_cache_expire(0); @session_start(); } Alternative use the library from Eric Mann: WP Session Manager, also his tutorial.