How can a PHP developer ensure accurate tracking of logged-in users on a website?

To ensure accurate tracking of logged-in users on a website, a PHP developer can utilize sessions to store user information securely. By setting session variables upon successful login and checking these variables on each page load, the developer can accurately track the logged-in status of users. 

<?php
session_start();

// Check if user is logged in
if(isset($_SESSION['user_id'])){
    // User is logged in
    $loggedInUserId = $_SESSION['user_id'];
    echo "Welcome, User ID: " . $loggedInUserId;
} else {
    // User is not logged in
    echo "Please log in to access this page";
}
?>

Keywords

Session management user authentication cookies PHP superglobal variables tracking users.

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