help with sessions. please

[aron]

why do i get this error

Notice: Undefined index: logged in d:\nuvocreative\master.php on line 12

Warning: Cannot modify header information - headers already sent by (output started at d:\nuvocreative\master.php:12) in d:\nuvocreative\master.php on line 14

<?php
session_start();

//Set vars... 
$baseurl="http://www.nuvo.biz"; //set this to your site's homepage. this is needed for relocation (can't use relative urls). don't append with a forward slash. 

//Check settings... 
if (ini_get('register_globals') == '0') generror("You must enable output buffering to allow redirection"); 
//|| $baseurl=="http://www.ulterior.com.au/test/clients/bre"
if ($baseurl=="" ) generror("You must enter the site's homepage (baseurl) in the script."); 

//line 12
if ($_SESSION["logged"]!=true) { 
//echo "not set";
//line14
header("Location: ".$baseurl."/login.php"); 
exit(); //in case redirection doesn't work 
}
?>

[matt_4013]

Because $_SESSION['logged'] isn't set. Rather than checking using != true, use:

if(isset($_SESSION['logged'])) {

[aron]

no still dosent work.

[matt_4013]

Well, I just coded myself up a little test script and it works great for me. No Notice when using isset.

<?php 

error_reporting(E_ALL);

if(isset($array['blah'])) {

echo '$array["blah"] is set!';
} else {

echo '$array["blah"] is NOT set!';
}

 ?>