Piwik\Plugins\PrivacyManager\PrivacyManager::savePurgeDataSettings PHP Method

    public static function savePurgeDataSettings($settings)
    {
        foreach (self::$purgeDataOptions as $configName => $configSection) {
            if (isset($settings[$configName])) {
                Option::set($configName, $settings[$configName]);
            }
        }
    }

 public function saveSettings()
 {
     Piwik::checkUserIsSuperUser();
     if ($_SERVER["REQUEST_METHOD"] == "POST") {
         $this->checkTokenInUrl();
         switch (Common::getRequestVar('form')) {
             case "formMaskLength":
                 $this->handlePluginState(Common::getRequestVar("anonymizeIPEnable", 0));
                 $trackerConfig = Config::getInstance()->Tracker;
                 $trackerConfig['ip_address_mask_length'] = Common::getRequestVar("maskLength", 1);
                 $trackerConfig['use_anonymized_ip_for_visit_enrichment'] = Common::getRequestVar("useAnonymizedIpForVisitEnrichment", 1);
                 Config::getInstance()->Tracker = $trackerConfig;
                 Config::getInstance()->forceSave();
                 break;
             case "formDeleteSettings":
                 $this->checkDataPurgeAdminSettingsIsEnabled();
                 $settings = $this->getPurgeSettingsFromRequest();
                 PrivacyManager::savePurgeDataSettings($settings);
                 break;
             default:
                 //do nothing
                 break;
         }
     }
     $notification = new Notification(Piwik::translate('General_YourChangesHaveBeenSaved'));
     $notification->context = Notification::CONTEXT_SUCCESS;
     Notification\Manager::notify('PrivacyManager_ChangesHaveBeenSaved', $notification);
     $this->redirectToIndex('PrivacyManager', 'privacySettings', null, null, null, array('updated' => 1));
 }