[Resolved] Jumping to new location with register_globals=on

supa_scoopa

I am using a lot of code I wrote about 6 to 12 months ago and the first thing I realized was that after switching register_globals off the code was not working. So I read all the variables from the $_POST & Co. arrays instead, without further problems.

Except when I try to redirect using header("Location: blahblah") after that, in the same page, it seems that reading from those arrays is sending a header (can be checked with headers_sent() or something like this). I don't know how to solve it except turning registers_global on again, and I don't want to do that. Is it a configuration problem? Is there any other way to jump to another address? (an elegant one!).

I thought this should be a common issue, but haven't found solutions anywhere I've looked on, so far.

Thanks in advance.

Pig

That second paragraph didn't make any sense to me. Can you rephrase? Also, global vs $_POST does not call headers at all. Can you post the code you are working with?

supa_scoopa

I'll try to rephrase it, maybe I wasn't very clear. I want to retrieve variables from a form. I do something like:

$login = $_POST['login'];

Later on, I use header("Location: whatever"). Then I get the annoying "headers already sent" message. Obviously no headers should be sent, since I am careful to output everything at the end of the file, past the processing.

There is a PHP function called headers_sent() that checks whether headers have been sent or not. When I place it just before that line above I receive false, when I place it after it I receive true. It makes no sense but such is the case.

Note that the form and its processing are on the same file/page, so that if some input is not correct it calls itself again, filling in the correct fields and asking for the missing ones. It only fails when everything's correct and I reach the redirect code; the rest of the code seems correct. Weird indeed, I'm at a loss. (I'm an autodidact PHP programmer, not an expert but not a total newbie either).

ahundiak

You probably have an extra blank or empty line at the end of one of your php files. The blank gets sent as html thus tirggering the headers already sent message.

Make sure all your code is inside of php tags:

<?php
?>An extra blank here
Will cause header problems.

supa_scoopa

I forgot to mention that I tried output buffering and it doesn't work.

ahundiak

Post the file or at least part of it that does not work.

supa_scoopa

I was working on that. Just wrote a short example of the problem. The code is a bit ugly, yeah, I know:

$h1 = headers_sent();
$login = $HTTP_POST_VARS['login'];
$h2 = headers_sent();
if($h1==true) $h1="true"; else $h1="false";
if($h2==true) $h2="true"; else $h2="false";
echo $h1." ".$h2;

I check for headers, I retrieve the variable and I check for headers again. The output is:

"false true"

This means that for some reason headers are sent at line 2.

(I use true/false because it wasn't printing the binary 0, just the 1).

supa_scoopa

That was fun... I'm developing locally, because I'm too lazy to upload every needed file every time I do any change during development. I uploaded the code to my server and it works (read "false false" instead of what appears above). Blame it on windows (php under windows, that's it).

I'll check it again tomorrow --it's late here--, but it seems to work now. Quite strange, anyway. Thanks for the help guys, I'll mark the thread as solved.

ahundiak

You may have just typed it in wrong but
if($h1==true) $h1="true"; else $h1="false";
Should be
if($h1==true) $h1="true" else $h1="false";

Pig

if($h1==true) $h1="true"; else $h1="false";

is just fine. There is nothign wrong with having the ;