What is the purpose of the "menu" function in the main.php file?

The purpose of the "menu" function in the main.php file is to display a navigation menu on the webpage. This function typically generates HTML code for a list of links that users can click on to navigate to different sections of the website. To implement this function, you need to define the menu items and their corresponding URLs within the function.

function menu() {
    $menuItems = array(
        "Home" => "index.php",
        "About" => "about.php",
        "Services" => "services.php",
        "Contact" => "contact.php"
    );

    echo '<ul>';
    foreach ($menuItems as $label => $url) {
        echo '<li><a href="' . $url . '">' . $label . '</a></li>';
    }
    echo '</ul>';
}