session help

Anon

Hi:
Excuse me, i dont know you, but i really need some help with the session handling. I'm just making proves to the session in PHP4 but it dont works.
I wrote this script (pr.php):

<body>
<?php
$count=9;
session_start();
session_register("count");
$HTTP_SESSION_VARS["count"]++;
?>
To continue, <A HREF="nextpage.php?<?=SID?>">click here</A>
</body>

But the result is:
Warning: Cannot send session cookie - headers already sent by (output started at /home/goi/public_html/pr.php:2) in /home/goi/public_html/pr.php on line 4
Warning: Cannot send session cache limiter - headers already sent by (output started at /home/goi/public_html/pr.php:2) in /home/goi/public_html/pr.php on line 4
To continue, click here

The code for nextpage.php is:
<body>
<?
SESSION_REGISTER("count");
$count = $HTTP_POST_VARS["count"];
echo $count;
?>
</body>

When i go to nextpage.php clicking in the link this happens:
Warning: Cannot send session cookie - headers already sent by (output started at /home/goi/public_html/nextpage.php:3) in /home/goi/public_html/nextpage.php on line 4
Warning: Cannot send session cache limiter - headers already sent by (output started at /home/goi/public_html/nextpage.php:3) in /home/goi/public_html/nextpage.php on line 4

I want to see $count, but i dont have idea of what's happening...
Please, i need your help!!!

Thank you.
JUNIOR TELLO.

Anon

Put the PHP code dealing with the session as the very first thing in your document - before the tags.

The problem is that the session ID is stored as a cookie in the browser, and cookies are set as HTTP/1.1 headers (Set-Cookie). Header information must be sent before content, which means that you must do any work with headers before echoing anything to the document, and before the tags.

This is the same reason that you cannot use the header() function after outputting to a document.

Anon

Unless you have output_buffering On; in your php.ini.

Anon

Which is not the default because it slows PHP down quite a bit.

Anon

I have a similiar problem as Juniorts. My sessions were starting up just fine. I did some reformatting to the pages-added tables and such, went to restart the pages and I got the header already sent error. The session_start was the very first thing on the script.
<? session_start(); ?> <html ...

I am using Netscape Communicator 4.75- I am wondering if the problem is there. This has been a consistent problem even when I close the browser and restart the browser.

Anyone have an answer?

Anon

The fact that you put your session_start() at the top is good, but if you try to send another header lateron, you can still get the same error.

something like this is bad:

setcookie();
echo "hello!";
setcookie();

the second setcookie() will throw an error (and so it should).

The error should tell you where the problem occured. Be carefull, it tells you where the problem occured, but it also tells you where the first headers were set. The second is not where the problem is!

Anon

I figured out the problem. I used Microsoft Frontpage for reformatting. It apparently added some scripting that my text editor could not see, thus it was saying headers already sent although my editior did not show anything. Buyer Beware!!

Anon

Isn't MS lovely.. :-)