session_start不起作用:(

Question

I start a new session with : session_start(); then I set some session variables like this :

$_SESSION['name']=$_POST['name'];

and some another variables.

At bottom of page I set header to different page :

header('location: index.php');
exit();

Now in new page (index.php) I can't access to my session variables, like $_SESSION['name'] .

What's wrong ?

Thanks.

Answer 1

Are you calling session_start() in your other pages where you're trying to access your written $_SESSION variables? You will need to do that too before trying to read anything, eg:

session_start();
$blah = $_SESSION['blah'];

Answer 2

This is a known problem in PHP, HTTP, or whoever you want to blame. Basically, you cannot set cookies and redirect using HTTP in the same request . When you are starting a session that has not been created yet, you are sending a cookie.

Two options:

1. start the session elsewhere, or
2. send either JavaScript that forces a redirect, or use a meta tag.

Example:

<?php /* set session cookies */ ?>
<script>window.location.replace("index.php");</script>