lang($line[, $for = ''[, $attributes = array()]])

form_upload([$data = ''[, $value = ''[, $extra = '']]])

bcc($bcc[, $limit = ''])

set_header($header, $value)

create_links()

total_segments()

method([$upper = FALSE])

connect([$config = array()])

delete_dir($filepath)

set_caption($caption)