header.php

<?php 
include "db2.php";
if(isset($_SESSION['login_admin'])) {
  header("location: index.php");
}
  ?>

<header class="app-header"><a class="app-header__logo" href="index.php">A2J</a>
      <!-- Sidebar toggle button--><a class="app-sidebar__toggle" href="#" data-toggle="sidebar" aria-label="Hide Sidebar"></a>
      <!-- Navbar Right Menu-->
      <ul class="app-nav">
        <li class="app-search">
          <input class="app-search__input" type="search" placeholder="Search">
          <button class="app-search__button"><i class="fa fa-search"></i></button>
        </li>
        <!--Notification Menu-->
        <li class="dropdown"><a class="app-nav__item" href="#" data-toggle="dropdown" aria-label="Show notifications"><i class="fa fa-bell-o fa-lg"></i></a>
          <ul class="app-notification dropdown-menu dropdown-menu-right">
            <li class="app-notification__title">You have 4 new notifications.</li>
            <div class="app-notification__content">
              <li><a class="app-notification__item" href="javascript:;"><span class="app-notification__icon"><span class="fa-stack fa-lg"><i class="fa fa-circle fa-stack-2x text-primary"></i><i class="fa fa-envelope fa-stack-1x fa-inverse"></i></span></span>
                  <div>
                    <p class="app-notification__message">Lisa sent you a mail</p>
                    <p class="app-notification__meta">2 min ago</p>
                  </div></a></li>
              <li><a class="app-notification__item" href="javascript:;"><span class="app-notification__icon"><span class="fa-stack fa-lg"><i class="fa fa-circle fa-stack-2x text-danger"></i><i class="fa fa-hdd-o fa-stack-1x fa-inverse"></i></span></span>
                  <div>
                    <p class="app-notification__message">Mail server not working</p>
                    <p class="app-notification__meta">5 min ago</p>
                  </div></a></li>
              <li><a class="app-notification__item" href="javascript:;"><span class="app-notification__icon"><span class="fa-stack fa-lg"><i class="fa fa-circle fa-stack-2x text-success"></i><i class="fa fa-money fa-stack-1x fa-inverse"></i></span></span>
                  <div>
                    <p class="app-notification__message">Transaction complete</p>
                    <p class="app-notification__meta">2 days ago</p>
                  </div></a></li>
              <div class="app-notification__content">
                <li><a class="app-notification__item" href="javascript:;"><span class="app-notification__icon"><span class="fa-stack fa-lg"><i class="fa fa-circle fa-stack-2x text-primary"></i><i class="fa fa-envelope fa-stack-1x fa-inverse"></i></span></span>
                    <div>
                      <p class="app-notification__message">Lisa sent you a mail</p>
                      <p class="app-notification__meta">2 min ago</p>
                    </div></a></li>
                <li><a class="app-notification__item" href="javascript:;"><span class="app-notification__icon"><span class="fa-stack fa-lg"><i class="fa fa-circle fa-stack-2x text-danger"></i><i class="fa fa-hdd-o fa-stack-1x fa-inverse"></i></span></span>
                    <div>
                      <p class="app-notification__message">Mail server not working</p>
                      <p class="app-notification__meta">5 min ago</p>
                    </div></a></li>
                <li><a class="app-notification__item" href="javascript:;"><span class="app-notification__icon"><span class="fa-stack fa-lg"><i class="fa fa-circle fa-stack-2x text-success"></i><i class="fa fa-money fa-stack-1x fa-inverse"></i></span></span>
                    <div>
                      <p class="app-notification__message">Transaction complete</p>
                      <p class="app-notification__meta">2 days ago</p>
                    </div></a></li>
              </div>
            </div>
            <li class="app-notification__footer"><a href="#">See all notifications.</a></li>
          </ul>
        </li>
        <!-- User Menu-->
        <li class="dropdown"><a class="app-nav__item" href="#" data-toggle="dropdown" aria-label="Open Profile Menu"><i class="fa fa-user fa-lg"></i></a>
          <ul class="dropdown-menu settings-menu dropdown-menu-right">
            <li><a class="dropdown-item" href="page-user.html"><i class="fa fa-cog fa-lg"></i> Settings</a></li>
            <li><a class="dropdown-item" href="page-user.html"><i class="fa fa-user fa-lg"></i> Profile</a></li>
            <li><a class="dropdown-item" href="logout.php"><i class="fa fa-sign-out fa-lg"></i> Logout</a></li>
          </ul>
        </li>
      </ul>
    </header>