my session_start doesn't work :(

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 diffrent 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, e.g.:

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>