<?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($filename);$inputFileType=IOFactory::identify($filename);$reader=IOFactory::createReader($inputFileType);$sheetList=$reader->listWorksheetNames($filename);$sheetInfo=$reader->listWorksheetInfo($filename);$helper->log('File Type:');var_dump($inputFileType);$helper->log('Worksheet Names:');var_dump($sheetList);$helper->log('Worksheet Names:');var_dump($sheetInfo);