Piwik\Plugins\SitesManager\API::getSitesIdWithVisits PHP Method

    public function getSitesIdWithVisits($timestamp = false)
    {
        Piwik::checkUserHasSuperUserAccess();
        if (empty($timestamp)) {
            $timestamp = time();
        }
        $time = Date::factory((int) $timestamp)->getDatetime();
        $now = Date::now()->addHour(1)->getDatetime();
        $result = $this->getModel()->getSitesWithVisits($time, $now);
        $idSites = array();
        foreach ($result as $idSite) {
            $idSites[] = $idSite['idsite'];
        }
        return $idSites;
    }