Piwik\Plugins\ScheduledReports\API::validateReportFormat PHP Method

    private static function validateReportFormat($reportType, $reportFormat)
    {
        $reportFormats = array_keys(self::getReportFormats($reportType));
        if (!in_array($reportFormat, $reportFormats)) {
            throw new Exception(Piwik::translate('General_ExceptionInvalidReportRendererFormat', array($reportFormat, implode(', ', $reportFormats))));
        }
    }