Piwik\Site::getSite PHP Method

    public static function getSite($idsite)
    {
        $idsite = (int) $idsite;
        if (!isset(self::$infoSites[$idsite])) {
            $site = API::getInstance()->getSiteFromId($idsite);
            self::setSiteFromArray($idsite, $site);
        }
        return self::$infoSites[$idsite];
    }

 /**
  * @param string $period
  * @param string $date
  * @param string|false $segment
  */
 public function __construct($period, $date, $segment)
 {
     $sites = API::getInstance()->getAll($period, $date, $segment, $_restrictSitesToLogin = false, $enhanced = true, $searchTerm = false, $this->displayedMetricColumns);
     $sites->deleteRow(DataTable::ID_SUMMARY_ROW);
     /** @var DataTable $pastData */
     $pastData = $sites->getMetadata('pastData');
     $sites->filter(function (DataTable $table) use($pastData) {
         $pastRow = null;
         foreach ($table->getRows() as $row) {
             $idSite = $row->getColumn('label');
             $site = Site::getSite($idSite);
             // we cannot queue label and group as we might need them for search and sorting!
             $row->setColumn('label', $site['name']);
             $row->setMetadata('group', $site['group']);
             if ($pastData) {
                 // if we do not update the pastData labels, the evolution cannot be calculated correctly.
                 $pastRow = $pastData->getRowFromLabel($idSite);
                 if ($pastRow) {
                     $pastRow->setColumn('label', $site['name']);
                 }
             }
         }
         if ($pastData && $pastRow) {
             $pastData->setLabelsHaveChanged();
         }
     });
     $this->setSitesTable($sites);
 }