App\Http\Controllers\ReportController::export PHP Method

    private function export($reportType, $data, $columns, $totals)
    {
        $output = fopen('php://output', 'w') or Utils::fatalError();
        $reportType = trans("texts.{$reportType}s");
        $date = date('Y-m-d');
        header('Content-Type:application/csv');
        header("Content-Disposition:attachment;filename={$date}_Ninja_{$reportType}.csv");
        Utils::exportData($output, $data, Utils::trans($columns));
        fwrite($output, trans('texts.totals'));
        foreach ($totals as $currencyId => $fields) {
            foreach ($fields as $key => $value) {
                fwrite($output, ',' . trans("texts.{$key}"));
            }
            fwrite($output, "\n");
            break;
        }
        foreach ($totals as $currencyId => $fields) {
            $csv = Utils::getFromCache($currencyId, 'currencies')->name . ',';
            foreach ($fields as $key => $value) {
                $csv .= '"' . Utils::formatMoney($value, $currencyId) . '",';
            }
            fwrite($output, $csv . "\n");
        }
        fclose($output);
        exit;
    }