Cannot send session cache limiter - headers already sent

[arashi]

I get this msg: Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /web/www/frac/users/s/students/katalog/brukere/login.php:2) in /web/www/frac/users/s/students/katalog/brukere/login.php on line 3

when I use this code:

<?php
 
if($_GET['loggut']=="1")
{
session_start();
session_destroy(); 
header("Location: medlem.php"); 
exit(); 
} 
else 
{ 
session_start(); 
} 
 
 
require("innstillinger/konfigurasjon.php"); 
 
if(file_exists("installer.php")) 
{ 
echo <<<__HTML_END
exit(); 
} 
 
if(!empty('$_SESSION[b_brukernavn]') && 
!empty('$_SESSION[b_login_key]')) 
{ 
$b_brukernavn = '$_SESSION[b_brukernavn]'; 
$b_login_key = '$_SESSION[b_login_key]'; 
 
$sql = mysql_query("select * from $tabell_brukere where 
brukernavn = '$b_brukernavn' AND login_key = 
'$b_login_key' AND status <> '0'"); 
 
$antall_funnet = mysql_num_rows($sql); 
 
if($antall_funnet==1) 
{ 
header("Location: medlem.php"); 
exit(); 
} 
} 
 
if(isset($_POST[logginn])) 
{ 
foreach( $_POST as $key => $value ) 
{ 
 ${$key} = htmlspecialchars($value, ENT_QUOTES); 
} 
if(!empty($brukernavn) && !empty($passord)) 
{ 
$md_passord = md5($passord); 
 
$sjekk_bruker = mysql_query("select id from 
$tabell_brukere where passord='$md_passord' and 
brukernavn='$brukernavn'"); 
$funnet=mysql_num_rows($sjekk_bruker); 
 
if($funnet<>1) 
{ 
sleep(3); 
print "Beklager, gyldig bruker ble ikke funnet"; 
} 
else 
{ 
function tilfeldig_key($lengde) 
{ 
$utvalg = 
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqr 
stuvwxyz"; 
for($i=0;$i<$lengde;$i++) 
{ 
$streng .= $utvalg{rand(0,35)}; 
} 
return $streng; 
} 
$tidspunkt = date("d-m-Y H:i:s"); 
$login_session_kode = date("YmdHis").tilfeldig_key(15); 
$login_session_md_kode = md5($login_session_kode); 
 
$oppdater_db = mysql_query("update $tabell_brukere set 
login_key='$login_session_md_kode', 
login_tid='$tidspunkt', count=count+1 where 
brukernavn='$brukernavn' AND passord='$md_passord'"); 
 
if($oppdater_db) 
{ 
'$_SESSION[b_brukernavn]'= $brukernavn; 
'$_SESSION[b_login_key]'= $login_session_md_kode; 
 
header("Location: medlem.php"); 
print "Innlogging vellykket, <a href='$brukerside'>Gå 
videre til medlemsområdet --></a>"; 
exit(); 
} 
else 
{ 
print "Innlogging ikke mulig, prøv igjen"; 
} 
} 
} 
else 
{ 
print "Både brukernavn og passord må fylles ut"; 
} 
} 
 
// start logg inn skjema 
echo <<<__HTML_END
<form action="login.php" method="post"> 
 
Brukernavn 
 
<input type="text" name="brukernavn" 
value="$brukernavn" size="30" /> 
 
Passord 
 
<input type="password" name="passord" value="" 
size="30" /> 
 
<input type="submit" name="logginn" value="Logg inn" /> 
 
</form> 
 
<a href="glemt_pass.php">Glemt passord ?</a> 
 
 
__HTML_END;
}
?>

Can someone please help and help me to fix this?

[arashi]

I did remove the space and its working no more msg, but i just get a white side whitout anything on it!!! where the login box and password box?:S

help.

[nathj]

I get this msg: Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /web/www/frac/users/s/students/katalog/brukere/login.php:2) in /web/www/frac/users/s/students/katalog/brukere/login.php on line 3

when I use this code:

<?php
 
if($_GET['loggut']=="1")
{
session_start();
session_destroy(); ?>

Hi arashi,

The session_start(); line must be the very first thing the page executes. It has to run before anything else is set. This is what your error means.

Move the session_start() to the very top, so that it appears there and only there and you should be up and running - or at least have this error fixed.

Cheers
nathj

[ak1dnar]

When posting source codes please use the correct CODE tags, as It is help us to read the code lines easily.
[code=php]

[pbmods]

Heya, Arashi. Welcome to TSDN!

Changed thread title to better describe the problem (did you know that threads whose titles do not follow the Posting Guidelines actually get FEWER responses?).

If you're getting a blank page, your script is probably generating an error. Check out this article to find out what is going on.