In what ways can using session variables like "userid" and "usergroup" improve the security and flexibility of a PHP login script?

Using session variables like "userid" and "usergroup" can improve the security and flexibility of a PHP login script by securely storing user information on the server side. This prevents sensitive data from being exposed to the client side and reduces the risk of data tampering. Additionally, session variables can be easily accessed across different pages, allowing for a seamless user experience and simplifying the authentication process. 

<?php
session_start();

// Set session variables
$_SESSION['userid'] = $userid;
$_SESSION['usergroup'] = $usergroup;

// Access session variables
$userid = $_SESSION['userid'];
$usergroup = $_SESSION['usergroup'];
?>

Keywords

session variables userid usergroup security flexibility

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