set_userdata($data[, $value = NULL])

sess_destroy()

get_flash_keys()

class CI_Session userdata([$key = NULL])

keep_flashdata($key)

mark_as_temp($key[, $ttl = 300])

userdata([$key = NULL])

set_flashdata($data[, $value = NULL])

sess_regenerate([$destroy = FALSE])

get_temp_keys()