Using sessions session variables in a PHP Login Script

Question

I have created a login and register system in PHP. But I didn't use any sessions yet. 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 someone please help me with this I want to do this with the session?

Answer 1

Add this at the top of the page:

session_start(); 

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

 $_SESSION['user'] = $user_id;

Then check if someone has logged in:

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

Then add this 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
 }

I hope this helps you.