AdvSession::checkSession

static function checkSession()
{
	$request = MainContext::getCurrent()->getRequest();
	if(
		isset($request[static::URL_PARAM_CAMPAIGN])
		&& isset($request[static::URL_PARAM_BANNER])
	)
	{
		$_SESSION['SEO_ADV'] = array(
			"ENGINE" => YandexDirect::ENGINE_ID,
			"CAMPAIGN_ID" => $request[static::URL_PARAM_CAMPAIGN],
			"BANNER_ID" => $request[static::URL_PARAM_BANNER],
		);
	}
}