untuk save file excel

public function actionHahahaha()
{
    $excel = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
    $excel->getProperties()
        ->setCreator("Aplikasi Tes")
        ->setLastModifiedBy("Aplikasi Tes")
        ->setTitle("Report 123")
        ->setKeywords("Report 123")
        ->setCategory("Report 123");
    $excel->getActiveSheet()->setTitle("Report 123");
    $sheet = $excel->getActiveSheet();

    //Header
    $header = [
        'NIP',
        'Nama',
        'Jenis Jabfung',
        'Unit Kerja',
        'TMP Jabfung',
        'Periode',
        'Nilai Dupak'
    ];
    $sheet->fromArray($header, NULL, 'A1');

    //Isi
    $data = [];
    for($i=0; $i <= 10; $i++)
        $data[$i] = [
            '123',
            'udin',
            'jenis 1',
            'unit 1',
            '20-01-2019',
            '20-01-2019',
            10000
        ];
    }
    $sheet->fromArray($data, NULL, 'A2');

    //Contoh Column Size
    $sheet->getColumnDimension('A')->setWidth(28);
    $sheet->getColumnDimension('B')->setWidth(35);
    $sheet->getColumnDimension('C')->setWidth(35);
    $sheet->getColumnDimension('D')->setWidth(35);
    $sheet->getColumnDimension('E')->setWidth(20);
    $sheet->getColumnDimension('F')->setWidth(20);
    $sheet->getColumnDimension('G')->setWidth(15);

    $filename = "excel123-".time().".xlsx";

    //Versi Download
    // header('Content-Type: application/vnd.ms-excel');
    // header('Content-Disposition: attachment;filename="' . $filename . '"');
    // header('Cache-Control: max-age=0');
    // $writer = new \PhpOffice\PhpSpreadsheet\Writer\Xlsx($excel);
    // $writer->save('php://output');

    //Versi HTML
    // $writer = new \PhpOffice\PhpSpreadsheet\Writer\Html($excel);
    // $writer->save('php://output');

    //Versi Save to File
    $rootPath = Yii::getAlias('@app');
    $path = $rootPath . "web/tmp/" .$filename;
    $writer = new \PhpOffice\PhpSpreadsheet\Writer\Xlsx($excel);
    $writer->save($path);


}