Using sessions & session variables in a PHP Login Script

authentication, php, session

Solution

Begins the session, you need to say this at the top of a page or before you call session code

 session_start();

put a user id in the session to track who is logged in

 $_SESSION['user'] = $user_id;

Check if someone is logged in

 if (isset($_SESSION['user'])) {
   // logged in
 } else {
   // not logged in
 }

Find the logged in user ID

$_SESSION['user']

So on your page

 <?php
 session_start();


 if (isset($_SESSION['user'])) {
 ?>
   logged in HTML and code here
 <?php

 } else {
   ?>
   Not logged in HTML and code here
   <?php
 }

Problem

I have just finished creating an entire login and register systsem in PHP, but my problem is I haven't used any sessions yet. I'm kind of a newbie in PHP and I've never used sessions before. What I want to do is, after the user registers and fills out the login form, they will still stay on the same page. So, there will be one part of the which will be if the session is logged_in and the other part will be else (the user is not logged in so display the login form). Can anyone tell me how to get started?

Original source