subject($subject)

attach($filename[, $disposition = ''[, $newname = NULL[, $mime = '']]])

file($path[, $return = FALSE])

close()

clear([$clear_attachments = FALSE])

add_package_path($path[, $view_cascade = TRUE])

helper($helpers)

format_characters($str)

flashdata([$key = NULL])

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