Кеширование в header - Разработка расширений для Joomla

function toString($compress = false)
{
	$data = JResponse::getBody();

	// Don't compress something if the server is going todo it anyway. Waste of time.
	if($compress && !ini_get('zlib.output_compression') && ini_get('output_handler')!='ob_gzhandler') {
		$data = JResponse::_compress($data);
	}

	if (JResponse::allowCache() === false)
	{
		JResponse::setHeader( 'Expires', 'Mon, 1 Jan 2001 00:00:00 GMT', true ); 				// Expires in the past
		JResponse::setHeader( 'Last-Modified', gmdate("D, d M Y H:i:s") . ' GMT', true ); 		// Always modified
		JResponse::setHeader( 'Cache-Control', 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0', false );
		JResponse::setHeader( 'Pragma', 'no-cache' ); 											// HTTP 1.0
	}

	JResponse::sendHeaders();
	return $data;
}