setActiveSheetIndex(0); $sheet0->setCellValue('A1', 2); $obj->addNamedRange(new NamedRange('A1A', $sheet0, 'A1')); $sheet0->setCellValue('B1', '=2*A1A'); $writer = IOFactory::createWriter($obj, 'Xlsx'); $filename = File::temporaryFilename(); $writer->save($filename); self::assertTrue(true); unlink($filename); } }