valid_email($email)

display_errors([$open = ' '[, $close = ' ']])

display_error()

reply_to($replyto[, $name = ''])

CodeIgniter URLs

nbs([$num = 1])

class CI_Zip $compression_level = 2 The compression level to use. It

read_file($path[, $archive_filepath = FALSE])

send_error([$message = 'Incomplete information'])

cache_set_path([$path = ''])