How can PHP be used to redirect users to a login page based on their status as a guest?

To redirect users to a login page based on their status as a guest, you can check if they are logged in or not by using session variables. If the user is not logged in, you can redirect them to the login page using the header() function in PHP. 

<?php
session_start();

if(!isset($_SESSION['user_id'])) {
    header("Location: login.php");
    exit();
}
?>

Keywords

PHP redirect login page guest status conditional statement

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