appNavbar.php

<!-- Navbar -->
<nav class="main-header navbar navbar-expand navbar-white navbar-light">
  <!-- Left navbar links -->
  <ul class="navbar-nav">
    <li class="nav-item">
      <a class="nav-link" data-widget="pushmenu" href="#" role="button"><i class="fas fa-bars"></i></a>
    </li>
    <!--<li class="nav-item d-none d-sm-inline-block">
      <a href="index3.html" class="nav-link">Home</a>
    </li>
    <li class="nav-item d-none d-sm-inline-block">
      <a href="#" class="nav-link">Contact</a>
    </li>-->
  </ul>

  <!-- SEARCH FORM -->
  <form class="form-inline ml-3 form-search">
    <div class="input-group input-group-sm">
      <input type="search" name="search_keyword" id="search_keyword" class="form-control form-control-navbar toggle-search" 
        title="Busque pela data (dd/mm/aaaa);
          Busque pelo cliente (#cliente);
          Busque por qualquer solicita&ccedil;&atilde;o" 
        placeholder="Buscador geral" 
        aria-label="Buscador geral">
      <div class="input-group-append">
        <button class="btn btn-navbar" type="submit">
          <i class="fas fa-search"></i>
        </button>
      </div>
    </div>
  </form>

  <div class="div-search-close">
    <a title="Fechar o buscador"><span class="fas fa-times-circle fa-lg icon-search-close"></span></a>
  </div>
  
  <!-- Right navbar links -->
  <ul class="navbar-nav ml-auto">
    <li class="nav-item">
        <a class="nav-link bg-teal">Hi <?php echo $_SESSION['name']; ?></a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="sair" title="Sair" role="button" data-toggle="tooltip" data-original-title="Sair">
        <i class="fas fa-sign-out-alt"></i>
      </a>
    </li>
  </ul>
</nav>
<!-- /.navbar -->