Untitled

<body>
  <?php
  $page = isset($_GET['page']) ? $_GET['page'] : 'home';
  ?>
  <div class="navbar">
    <a href="?page=home"><img src="../assets/images/#.png" class="logo"></a>
    <ul>
    <li class="shop"><a href="?page=shop" class="<?= getActiveClass($page, 'shop'); ?>">loja</a></li>
      <li class="lookbook-text"><a href="?page=lookbooks" class="<?= getActiveClass($page, 'lookbooks'); ?>">lookbooks</a></li>
      <li class="contact"><a href="?page=contact" class="<?= getActiveClass($page, 'contact'); ?>">contato</a></li>
      <li class="blog"><a href="?page=blog" class="<?= getActiveClass($page, 'blog'); ?>">blog</a></li>
      <li class="videos"><a href="?page=videos" class="<?= getActiveClass($page, 'videos'); ?>">vídeos</a></li>
    </ul>
  </div>
  <?php
  function getActiveClass($page, $currentPage) {
    return ($page == $currentPage) ? 'active' : '';
  }
  switch ($page) {
    case 'shop':
      include_once('shop.php');