Need help about sessions!

[el_quijote]

I'm having the following messages when i start a php page I'm constructing.

Warning: Cannot send session cookie - headers already sent by (output started at c:\program files\apache group\apache\htdocs\fuchsmexico\default.php:5) in c:\program files\apache group\apache\htdocs\fuchsmexico\default.php on line 12

Warning: Cannot send session cache limiter - headers already sent (output started at c:\program files\apache group\apache\htdocs\fuchsmexico\default.php:5) in c:\program files\apache group\apache\htdocs\fuchsmexico\default.php on line 12
Starting session

My code is as follows

<?php
include('functions.php');
?>

<?php
global $LoginForm;
global $logged;
global $msg;
global $conn;

     if (!$_SESSION[ON])
        {session_start();
          print "Starting session";
          $_SESSION[ON]=true;
        }

    do_DBconnection();
    if(!$_SESSION[FIRSTTIME])
        {do_selectLanguage();
          do_loginform();
          print $LoginForm;
          exit;}

print " session is ON:".$_SESSION[ON]."<br>";
print " sessionID:".session_id();
?>

What's happening ...?

el Quijote

[Frederick]

Looks like you have a print out in default.php
you can not show content or any HTML in the page before a session()

[el_quijote]

I'm new to php. I'm trying to keep track about who is logged in my page and if it is the first time I display the form. I thougth that declaring a session I could solve the problem but I got the warnings that told you in my first post. If I understand your post, I can´t do any HTML nor print out before a session_start()?. I'm confused because I thougth a session ends when you destroy it or when the browser shuts down, but the warnings I mention still comes out after doing both things. What's going on ?

[Frederick]

Add

session_unset();

after your

session_destroy();

[el_quijote]

I thougt that a session ends with browser shut down or when you deliberatedly stop the session. I've got those warning when my php script aborted unexpectedly. What's the meaning of that warnings ?...

Maybe you may suggest some literatura about sessions...

Thanks for your patience..

el quijote

[tsinka]

Depending on the PHP setup PHP sends a session cookie to the browser. That's done via a HTTP header. But PHP can only send headers if there's no output so far. Output is any echo or any code outside PHP blocks (even empty lines).

So one problem with your code is

<?PHP
// some code
?>

<?PHP
// some more code
?>

Change that to:

<?PHP
//some code

//some more code
?>

and make sure that any file included doesn't contain any output.

Another way is output buffering. Add ob_start() on top of the script to enable output buffering.

But I think the cleaner way is to correct the code.

If a session ends with a browser shut down depends on the PHP session settings.

Thomas

[el_quijote]

Thank you fellows...

I'll do that ...

el Quijote