_flashdata_mark
_flashdata_sweep
$cookie_sent
DB_Session
DB_Session
DB_Session.php
$encryption
$flash_key
flashdata
$gc_probability
keep_flashdata
$now
$object
$session_table
$sess_cookie
$sess_length
sess_create
sess_destroy
sess_gc
sess_read
sess_run
sess_send_cookie
sess_update
set_flashdata
set_userdata
$userdata
$use_database
unset_userdata
userdata