How can PHP developers ensure that multiple windows with the same page open do not interfere with the functionality of returning to the last visited page?

To prevent interference when multiple windows with the same page open, PHP developers can use session variables to store the last visited page. By storing this information in the session, each window will have its own unique session data, ensuring that the functionality of returning to the last visited page is not affected by other windows.

<?php
session_start();

if(isset($_SESSION['last_visited_page'])) {
    // Redirect to the last visited page
    header("Location: " . $_SESSION['last_visited_page']);
    exit;
}

// Store the current page as the last visited page
$_SESSION['last_visited_page'] = $_SERVER['REQUEST_URI'];
?>