item($item[, $index=''])

backup([$params = array()])

custom_result_object($class_name)

mb_substr($str, $start[, $length = NULL[, $encoding = NULL]])

ruri_string()

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

gmt_to_local([$time = ''[, $timezone = 'UTC'[, $dst = FALSE]]])

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

archive($filepath)

referrer()