Send 2 different headers in same page?

[Anon]

Hi, my problem is :
After my page has this line:
session_start();

on the top of my php page,
then I call some header() in order to force the browser to download files.

This doesn't work. Anyone know how to send 2 different headers ?

Thanks for advices.

[lucianoes]

You "call some header()"??? And what header would that be exactly?

If you're trying something along the lines of

header("Content-type: application/pdf");
header("Content-Disposition: attachment; filename=downloaded.pdf");

the manual reveals that a bug in Internet Explorer 4 and 5 prevents this from working.

BTW, are you sure you didn't send anything else to the browser before you "called some header()"? If the answer is yes, it won't work with any browser. Double check that.

Luciano ES
Santos, SP - Brasil

[lucianoes]

Actually, if you answer yes, then it WILL work. It may not work if you answer "no".

Err... you know what I mean, dontcha?

Luciano ES
Santos, SP - Brasil

[Anon]

My code is sth like this:
//---------Start of code
session_start();
if ( session_is_registered("member")
{

function detect_browser($variable)
{
if(eregi("(msie) ([0-9]{1,2}.[0-9]{1,3})", $variable))
{
$content = "ie";
}else{
$content = "nn";
}
return $content;
}

if ( file_exists($filename) )
{
if (detect_browser($HTTP_USER_AGENT) == "ie")
{
Header("Content-type: application/force-download");
}else{
Header("Content-Type: application/octet-stream");
}
Header("Content-Length: ".filesize($file_path));
Header("Content-Disposition: attachment; filename=$filename");
readfile($file_path);
} else { Echo " $filename doesn't exist." ;}

} // if session is register

//--------end of code

If I remove the 2 lines:

session_start()
if (session_is_registered("member")

then it works, the file can be downloaded.
But if I add the session_start(), then at first it show me a download dialog box which ask me whether want to save it or open it. When I click save it, then it will show me an error dialog box :
"Internet explorer was not able to open this Internet site.The requested site either is unavailable or cannot be found. Please try again later."

How should I solve this?

Thanks for advice.

[Anon]

I think I found your problem in a user comment in the manual... this fix works for me:

Here I think I have found the problem with my downloads:

There is a bug(?) in Internet Explorer v5.5 to do with file downloads over a secure (https) web connection when using sessions. If you have a php script which delivers files for downloading by setting headers for the
content-type etc. from a URL like this:

getfile.php/filename.ext
- or -
getfile.php?file=/filename.ext

and that script uses sessions, then you must explicitly set

session_cache_limiter('public');

before you use
session_start();

otherwise you will get one of the following errors from IE when it attmpts
to download the file:

Internet Explorer cannot download filename.ext from
name.of.your.webserver
Internet Explorer was not able to open this site. The requested site is
either unavailable or cannot be found. Please try again later.

Mmm, this is useful error message isn't it! The other error you will see
when right clicking and choosing 'Save Target As...' gives the error

Internet Explorer cannot download filename.ext from
name.of.your.webserver
The file could not be written to the cache.

This problem does not occur over unsecure (http) links and files download
OK. I don't know why this should be the case, but PHP seems to send an
extra no-cache header when using sessions which breaks IE when it is using
SSL. Setting the session_cache_limiter turns off this behaviour.