public static function getInstance() { if (is_null(self::$instance)) { self::$instance = new self(); } return self::$instance; }
function SignedPacketByTSIG($updater) { $config_manager = MMMConfiguration::getInstance(); $tsig_key_name = $config_manager->item('tsig_key_name'); $tsig_key_value = $config_manager->item('tsig_key_value'); if (!is_null($tsig_key_name) && !is_null($tsig_key_value)) { $updater->signTSIG($tsig_key_name, $tsig_key_value); } }