Responder::respond

static function respond()
{
	require_once(__DIR__."/helper.php");

	self::setErrorHandler(); //avoid possible PHP warnings or notices
	self::registerAutoloader();

	self::modifyHttpHeaders();

	if (self::isValidRequest())
	{
		if (!Helper::isCompositeRequest())
		{
			self::trySendResponse();
		}

		define("USE_HTML_STATIC_CACHE", true);
	}

	self::unregisterAutoloader();
	self::restoreErrorHandler();
}