PHP session won't work after updating PHP version

Question

After moving my website from older to new version of PHP my login session show the following message undefined Function Session_Register but before upgrading this script work

Here is my login script

if($count=1)
{
    session_register('username');

    header("location:authorized.php");
}

Answer 1

That function is deprecated. Use:

$_SESSION['username'] = 'value';

Answer 2

session_register has been deprecated.

please use $_session['key'] and set your value in this

also must have session started before this:- session_start()

$_SESSION['username'] = 'anyvalue';

for get this session you need

$sss = $_SESSION['username'];

Answer 3

<?php
   session_start();
?>

Did you start session

Answer 4

The function session_register was deprecated in version 5.3 and completely removed in version 5.4.

This means that you will have to change all instances of session_register from:

session_register('username');

to something like:

$_SESSION['username'] = $username;

Answer 5

If facing session issue in Codeigniter, Then upgrade Codeigniter to latest version. Issue will resolved.