<?phpusePhpOffice\PhpSpreadsheet\IOFactory;usePhpOffice\PhpSpreadsheet\Writer\Xlsx;require__DIR__.'/../Header.php';// Create temporary file that will be read$sampleSpreadsheet=require__DIR__.'/../templates/sampleSpreadsheet.php';$filename=$helper->getTemporaryFilename();$writer=newXlsx($sampleSpreadsheet);$writer->save($filename);$callStartTime=microtime(true);$spreadsheet=IOFactory::load($filename);$helper->logRead('Xlsx',$filename,$callStartTime);// Save$helper->write($spreadsheet,__FILE__);