Piwik\Plugins\Dashboard\Controller::saveLayoutAsDefault PHP Method

    public function saveLayoutAsDefault()
    {
        $this->checkTokenInUrl();
        if (Piwik::hasUserSuperUserAccess()) {
            $layout = Common::unsanitizeInputValue(Common::getRequestVar('layout'));
            $layout = strip_tags($layout);
            $this->getModel()->createOrUpdateDashboard('', '1', $layout);
        }
    }