Description:
------------
I am using PHP 5 and I ran into a problem using $_SESSION and session_start() because they do not store values.  I have the register_globals option set to Off and the session.auto_start set to 0. I am running apache 2.0 on my computer as a test server through localhost. It has also caused me trouble when I am trying to use User Authentication Applications


Reproduce code:
---------------
page1.php-------------------------------------------------------

// This first page is suppoused to store "Hello world!" as a value in the  $_SESSION['sess_var'] so it can pass it to page2.php

<?php
  session_start();
  
  $_SESSION['sess_var'] = "Hello world!";

  echo 'The content of $_SESSION[\'sess_var\'] is '
        .$_SESSION['sess_var'].'<br />';
?>
<a href="page2.php">Next page</a> 

page2.php-------------------------------------------------------

// Somehow it does not display "Hello World!"

<?php
  session_start();

  echo 'The content of $_SESSION[\'sess_var\'] is '
        .$_SESSION['sess_var'].'<br />';

  unset($_SESSION['sess_var']);
?>
<a href="page3.php">Next page</a>

page3.php-------------------------------------------------------

<?php
 
  session_start();

  echo 'The content of $_SESSION[\'sess_var\'] is '
        .$_SESSION['sess_var'].'<br />';

  session_destroy();
?> 

Expected result:
----------------
I would expect page1.php and page2.php to show:

The content of $_SESSION['sess_var'] is Hello world!
Next page 

But page2.php only shows:

The content of $_SESSION['sess_var'] is
Next page 

Actual result:
--------------
Page1.php:

The content of $_SESSION['sess_var'] is Hello world!
Next page 

Page2.php only shows:

The content of $_SESSION['sess_var'] is
Next page