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? header("Pragma: public"); ? ? ? ?header("Expires: 0"); ? ? ? ?header("Cache-Control:must-revalidate, post-check=0, pre-check=0") ?. -Type:application/force-download"); ? ? ? ?header("Content-Type:application/vnd.ms-execl"); ? ? ? ?header("Content-Type:application/octet-stream"); application/download");; ? ? ? ?header('Content-Disposition:attachment;filename='.$fileName.''); ? ? ? ?header("Content-Transfer-Encoding:binary");/ ($spreadsheet,'Xlsx'); ? ? ? ?$writer->save('php://output');

但是如果

#??$writer->save('檔案名稱' );

就可以直接儲(chǔ)存在根目錄，但不能下載