validation_errors([$prefix = ''[, $suffix = '']])

rsegment($n[, $no_result = NULL])

is_https()

error_string([$prefix = ''[, $suffix = '']])

form_hidden($name[, $value = ''])

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

standard_date([$fmt = 'DATE_RFC822'[, $time = NULL]])

charsets()

run([$group = ''])

__set($key, $value)