How can PHP sessions be effectively utilized to manage user login status and prevent the issue of double recognition of user logins?

To manage user login status and prevent double recognition of user logins, PHP sessions can be effectively utilized by storing user authentication information in the session variables. By checking the session variables on each page load, you can verify the user's login status and prevent multiple logins for the same user. 

<?php
session_start();

if(isset($_SESSION['user_id'])) {
    // User is logged in
    // Perform actions for logged in users
} else {
    // User is not logged in
    // Redirect to login page or display login form
}
?>

Keywords

PHP sessions user login status double recognition session management authentication.

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