cookie([$index = NULL[, $xss_clean = NULL]])

password_verify($password, $hash)

get([$index = NULL[, $xss_clean = NULL]])

timespan([$seconds = 1[, $time = ''[, $units = '']]])

This tutorial did not cover all of the things you might expect of a full-fledged content management system, but it introduced you to the more important topics of routing, writing

set_rules($field[, $label = ''[, $rules = '']])

assoc_to_uri($array)

show_error($message, $status_code, $heading = 'An Error Was Encountered')

accept_charset([$charset = 'utf-8'])

class CI_Pagination initialize([$params = array()])