public function getSearchParam()
    {
        if ($this->_sSearchParam === null) {
            $this->_sSearchParam = false;
            if ($this->getArticleId()) {
                $this->_sSearchParam = rawurlencode(\OxidEsales\Eshop\Core\Registry::getConfig()->getRequestParameter('searchparam', true));
            }
        }

        return $this->_sSearchParam;
    }