PHP Server prompt download function to solve the idea

PHP Server prompt Download function
I here is the PC server, and now other computers to visit me here, need to prompt the download function, how to implement it?

It's like writing a download in index.php? There is no experience at all, and I do not know what to do.

I added this section.

PHP Code

And then what to do?

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Then visit this page on another computer.
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Do you want to make a link directly with HTML code?
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Filename=aa.rar//A name is to be taken here. Otherwise the RAR file will be formed.
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PHP code

 #down. Php$file = ' asdfggg.pdf '; _download ("Files_dir /". $file, $file); function _download ($f _location, $f _name) {header (" cache-control:must-revalidate, post-check=0, pre-   Check=0 ");   Header (' Content-description:file Transfer ');   Header (' Content-type:application/octet-stream ');   Header (' Content-length: '. FileSize ($f _location));   Header (' content-disposition:attachment; Filename= '. basename ($f _name));  ReadFile ($f _location);
   
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     discussion  
    
 
    
 I added these 3 lines of code to the localsettings.php:
   
    
 PHP Code 
    
 
    
 Header ("Content-type:application/rar");
   
    
 
    
 Header ("Content-disposition:attachment;filename=sqlite.rar");
   
    
 
    
 ReadFile ("E:\ziptest\SQLite.rar");
   
    
 
    
 
    
 Login to the first page, there is a download prompt, but ... 
    
 
    
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