session_start(), Pragma and Cache-control headers

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Hello,

I'm working on a downbload script which serves M3U
files (Winamp playlist files) through a PHP file
like this :

somepath/download.m3u.php?id=2

Then in the PHP script I generate the M3U file, and
serve up the headers I want. Swell so far, but a
little problem appears.

The downloads are for members only, and therefor I
need to check if the user is logged in, I do this by
sessions and therefore I add a session_start() at the
start of my file. When I do this some headers are
added to the file, namely :

Set-Cookie: PHPSESSID=xxx; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0,
pre-check=0
Pragma: no-cache

Theese headers are not needed, and I dont want them
either, exept I cant seem to get rid of them since I
need the session_start() in the beginning of the file.

Sure, I could wish for a function unset_potensial_header(pragma);

I guess there are no way to remove theese unwanted headers?
Yesterday I had to give up another problem, but luckily I
found the answer here :  http://bugs.php.net/bug.php?id=33057

So to sum it up :
How can I remove the Cache-Control and Pragma headers?

And Im not looking for this answer :
  header('Pragma: ');
  header('Cache-control: ');

The headers are still sendt, exept they are empty, doesnt look
like a nice sollution for a production environment.

Kind regards,
Kim Steinhaug
- - - - - - - - -
www.steinhaug.com

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