How does using JavaScript compare to PHP for achieving the desired navigation highlighting effect?

To achieve the desired navigation highlighting effect using JavaScript, you would need to add event listeners to each navigation link to detect when it is clicked or when the page is scrolled. Then, you can dynamically add a CSS class to the active navigation link to highlight it. Here is an example of how you can achieve this effect using PHP:

<nav>
    <a href="/" <?php if ($_SERVER['REQUEST_URI'] == '/') echo 'class="active"'; ?>>Home</a>
    <a href="/about" <?php if ($_SERVER['REQUEST_URI'] == '/about') echo 'class="active"'; ?>>About</a>
    <a href="/services" <?php if ($_SERVER['REQUEST_URI'] == '/services') echo 'class="active"'; ?>>Services</a>
    <a href="/contact" <?php if ($_SERVER['REQUEST_URI'] == '/contact') echo 'class="active"'; ?>>Contact</a>
</nav>