to($to)

mirror($locpath, $rempath)

send_email($recipient, $subject, $message)

class CI_URI segment($n[, $no_result = NULL])

trans_off()

set_update_batch($key[, $value = ''[, $escape = NULL]])

encode_from_legacy($string[, $legacy_mode = MCRYPT_MODE_ECB[, $key = '']])

set_radio($field[, $value = ''[, $default = FALSE]])

userdata([$key = NULL])

append_output($output)