<?phpusePhpOffice\PhpSpreadsheet\IOFactory;usePhpOffice\PhpSpreadsheet\Writer\Xlsx;require__DIR__.'/../Header.php';$sampleSpreadsheet=require__DIR__.'/../templates/sampleSpreadsheet.php';$filename=$helper->getTemporaryFilename();$writer=newXlsx($sampleSpreadsheet);$callStartTime=microtime(true);$writer->save($filename);$helper->logWrite($writer,$filename,$callStartTime);$callStartTime=microtime(true);$reader=IOFactory::createReader('Xlsx');$spreadsheet=$reader->load($filename);$helper->logRead('Xlsx',$filename,$callStartTime);$helper->log('Iterate worksheets');foreach($spreadsheet->getWorksheetIterator()as$worksheet){$helper->log('Worksheet - '.$worksheet->getTitle());foreach($worksheet->getRowIterator()as$row){$helper->log(' Row number - '.$row->getRowIndex());$cellIterator=$row->getCellIterator();$cellIterator->setIterateOnlyExistingCells(false);// Loop all cells, even if it is not setforeach($cellIteratoras$cell){if($cell!==null){$helper->log(' Cell - '.$cell->getCoordinate().' - '.$cell->getCalculatedValue());}}}}