Symfony\Installer\DownloadCommand::enableSignalHandler PHP Метод

    private function enableSignalHandler()
    {
        if (!function_exists('pcntl_signal')) {
            return;
        }
        declare (ticks=1);
        pcntl_signal(SIGINT, function () {
            error_reporting(0);
            throw new AbortException();
        });
    }