Processing excell

i was trying to make the aplication that will process excell by taking the data from the excell and save them to the database quickly after user upload the excell i have try to do this by the message come that it is unable public function upload()
Yii::$app->session->setFlash(‘success’, ‘am glad you call.’);
if ($this->validate()) {
foreach ($this->excelFiles as $file) {
$spreadsheet = IOFactory::load($file->tempName);
$sheetData = $spreadsheet->getActiveSheet()->toArray(null, true, true, true);

            foreach ($sheetData as $rowData) {
                $model = new AppServiceleavy(); 

                $model->company_name = $rowData['A'];
                $model->payer_id = $rowData['B'];
                $model->tin_no = $rowData['C'];
                $model->year = $rowData['D'];
                $model->january = $rowData['E'];
                $model->february = $rowData['F'];
                $model->march = $rowData['G'];
                $model->april = $rowData['H'];
                $model->may = $rowData['I'];
                $model->june = $rowData['J'];
                $model->july = $rowData['K'];
                $model->august = $rowData['L'];
                $model->september = $rowData['M'];
                $model->october = $rowData['N'];
                $model->november = $rowData['O'];
                $model->december = $rowData['P'];
                $model->totalserviceleavy = $rowData['Q'];

                $model->save(false); // Skip validation for simplicity