function dow_file($filename){
header('Accept-Length:'.filesize($filename));
header('Content-Disposition:attachment;filename='.basename($filename));
readfile($filename);
}
dow_file('www.zip');The www.zip file under this file exists. And the directory is correct.
#But the page that opens is blank. Even now it's a picture. It is also parsed in a garbled format.
Could you please ask the teacher if there is any extension function that needs to be opened?
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
If the page is blank, you need to check whether the data in your returned response body is correct