高久峰

       $file = 'C:/Users/gao/Documents/WXWork/1688857048324134/Cache/File/2022-08/集团报数数据差异明细对比.xlsx';
        $spreadsheet = IOFactory::load($file);
        $cloneSpreadsheet = clone $spreadsheet->getSheet(0);
        $cloneSpreadsheet->setTitle('新的工作表');
        $spreadsheet->addSheet($cloneSpreadsheet);
        $writer = new Xlsx($spreadsheet);
        $writer->save($file);