php - Force browsers to download a file rather than open

Question

I'm using typical PHP code to download documents:

  header('Content-Type: ' . $mimeTypes[$fileext]); 
  header('Content-Disposition: attachment; filename="' . $filename . '"');
  header('Content-Transfer-Encoding: binary');
  header('Accept-Ranges: bytes');
  header('Cache-Control: private');
  header('Pragma: private');

  readfile($filepath);

Everything works fine - a download/save-as dialog opens, except for .doc files which attempt to open in docs.google.com but they fail due to lack of permission - that's because I'm serving files from outside a website root.

So how do I bypass docs.google and force every browser to offer save-as dialog regardless of the file mime type? ('doc' => 'application/msword')

I tried the following to no avail:

1. in .htaccess file:

   <FilesMatch ".(?i:doc)$">
       ForceType application/octet-stream
       Header set Content-Disposition attachment
   </FilesMatch>
   

2. in .htaccess file:

   AddType application/octet-stream .doc
   

3. in PHP script:

   header('Content-Type: application/force-download');
   

Answer 1

Add this to your headers:

header("Content-type: application/force-download");