<nav class="navbar navbar-expand-lg navbar-light navbar-header fixed-top" >
  <a class="navbar-brand" href="#" style="display:none;">Navbar</a>
  <ul class="nav navbar-nav">
  <li <?php echo echoActiveClassIfRequestMatches("index"); ?>>
      <a class="nav-link" href="/index.php">Home</a>
  </li>
  <li <?php echo echoActiveClassIfRequestMatches("about"); ?>>
    <a class="nav-link" href="about.php">Chi sono?</a>
  </li>
  <li <?php echo echoActiveClassIfRequestMatches("photo"); ?>>
    <a class="nav-link" href="photo.php">Foto</a>
  </li>
  <li <?php echo echoActiveClassIfRequestMatches("downloads"); ?>>
    <a class="nav-link" href="downloads.php">Downloads</a>
  </li>
  <li <?php echo echoActiveClassIfRequestMatches("links"); ?>>
    <a class="nav-link" href="links.php">Links</a>
  </li>
    <li <?php echo echoActiveClassIfRequestMatches("contact"); ?>>
    <a class="nav-link" href="contact.php">Contatti</a>
    </li>
    </ul>
</nav>