Session Question

Nathan__02

Ok I have a login script and when u clik submit it takes u to index.php. On index.php it sets the session if the username and password are correct. But everytime i go to another page and then return to index...it always tells me i have to refresh the page...why...ill give u my index.php script. if you need an more information please ask. Thanks alot in advance.

<?php
session_start();
include("config.php");
include("style.css");

$username=$_POST['username'];
$password=$_POST['password'];
$query=mysql_query("SELECT * FROM users WHERE username='$username' AND password='$password'") or die("mysql error: ".mysql_error());

if ($submit)

{

if (mysql_num_rows($query) > 0) 

{
        $row=mysql_fetch_array($query);
        session_register('id'); 
        $_SESSION['id'] = $row[id]; 
        session_register('username'); 
        $_SESSION['username'] = $row[username]; 
        session_register('password'); 
        $_SESSION['password'] = $row[password]; 
        session_register('userlevel'); 
        $_SESSION['user_level'] = $row[userlevel]; 

}
}

if (!$_SESSION['username']) 
{
die("You are not logged in please <a href='/shelta/login.php'>login</a>");

} else {

echo("<table width='900' height='600' cellspacing='0' cellpadding='5'   border='1' bordercolor='#303030'>");
echo("<tr height='600'><td width='100'>Logged in as:<br> $_SESSION[username]</td><td width='*'>");

if ($row[userlevel] == 2)
{
echo("<a href='/shelta/news.php'>News</a><br>Forums<BR><a href='/shelta/members.php'>Members</a><BR>Options<BR><a href='/shelta/admin.php'>Admin</a><br>");
}
 else
 {
echo("<a href='/shelta/news.php'>News</a><br>Forums<BR><a href='/shelta/members.php'>Members</a><BR>Options<BR>");
}
echo("</td></tr></table>");
}



echo("</div>");

?>

sijis

well, I really can't tell you what is your definate problem, but i do notice a few things. First off, there seems to be a problem (a caution) in the manual stating that is you use $_SESSION do NOT use session_register, i believe its because you're just doing the same thing twice, but either way that note is found here:
http://www.php.net/manual/en/function.session-register.php

now if you stay with what you currently have, it also seems that you are registering the the session before there is any value, so when a person goes back to that page, that session doesn't have a value, but i could be wrong.

my suggestions, in order.
get rid of session_register()
it might be causing the problem.

if that doesn't help, try putting the code like this:

        $_SESSION['id'] = $row[id]; 
        session_register('id');

but i'd first do option 1.

on another idea. i have noticed that a page that is generated from a form's value always seems to be refreshed. don't know why. but are you using a link to get to that index.php page or are you using to browser's 'back button' to get to index.php?

hth.