slash_segment($n[, $where = 'trailing'])

ruri_to_assoc([$n = 3[, $default = array()]])

cc($cc)

class CI_Security xss_clean($str[, $is_image = FALSE])

keep_flashdata($key)

form_input([$data = ''[, $value = ''[, $extra = '']]])

send_success()

If you find that no matter what you put in your URL only your default page is loading, it might be that your server does not support the REQUEST_URI variable needed to serve

adjust_date($month, $year)

initialize([$config = array()])