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

sanitize_filename($str[, $relative_path = FALSE])

get_var($key)

class CI_Security xss_clean($str[, $is_image = FALSE])

is_supported($driver)

product_options([$row_id = ''])

is_mobile([$key = NULL])

mirror($locpath, $rempath)

get_vars()

database_exists($database_name)