Piwik\Plugins\SitesManager\SitesManager::getTrackerSearchCategoryParameters PHP Method

    private function getTrackerSearchCategoryParameters($website)
    {
        $searchParameters = $website['sitesearch_category_parameters'];
        if (empty($searchParameters)) {
            $searchParameters = API::getInstance()->getSearchCategoryParametersGlobal();
        }
        return explode(",", $searchParameters);
    }