<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
  <div class="container-fluid">
    <img src="images/logo.png" width="90" height="90">
      <a class="navbar-brand" href="index.php">
      <h3><?php echo $title; ?></h3></a> 
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarSupportedContent">
  </div>
</nav>