Piwik\Tracker\Response::outputApiResponse PHP Метод

    private function outputApiResponse(Tracker $tracker)
    {
        if ($tracker->isDebugModeEnabled()) {
            return;
        }
        if ($this->hasAlreadyPrintedOutput()) {
            return;
        }
        $request = $_GET + $_POST;
        if (array_key_exists('send_image', $request) && $request['send_image'] === '0') {
            Common::sendResponseCode(204);
            return;
        }
        $this->outputTransparentGif();
    }