a

<?php
session_start();

if (!isset($_GET["page"]) || isset($page))
   $page = "home";
else
   $page = $_GET["page"];
?>
<!DOCTYPE html>
<html lang="en">
 <head>
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
   <meta name="description" content="">
   <meta name="author" content="">
   <link rel="icon" href="favicon.ico">

   <title>Mortal Magi Agents</title>

   <!-- Bootstrap core CSS -->
   <link href="css/bootstrap.min.css" rel="stylesheet">

   <!-- Custom styles for this template -->
   <link href="css/jumbotron.css" rel="stylesheet">

   <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
   <!--[if lt IE 9]>
     <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
     <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
   <![endif]-->
 </head>

 <body>

   <nav class="navbar navbar-inverse navbar-fixed-top">
     <div class="container">
       <div class="navbar-header">
         <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
           <span class="sr-only">Toggle navigation</span>
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
           <span class="icon-bar"></span>
         </button>
         <a class="navbar-brand" href="index.php">Mortal Magi Agents</a>
       </div>
       <div id="navbar" class="collapse navbar-collapse">
         <ul class="nav navbar-nav">
           <li class="active"><a href="?page=home">Home</a></li>
           <li><a href="?page=news">News</a></li>
           <li><a href="#contact">Contact</a></li>
         </ul>
<?php if (isset($_SESSION["user"])) { ?>
         <ul class="nav navbar-nav navbar-right">
           <li class='dropdown'>
             <a href="#" aria-expanded="false" class="dropdown-toggle" data-toggle="dropdown" role="button">
             <?php
             if (isset($_SESSION["avator"])) {
                 echo '<img src="'.$_SESSION['avator'].'" width="32" height="32">';
             }
             echo $_SESSION["user"];
             ?><span class='caret'></span></a>
             <ul class='dropdown-menu' role='menu'>
             <li><a href="?page=settings">Settings</a></li>
             <li><a href="logout.php">Sign out</a></li>
             </ul>
           </li>
         </ul>
<?php } else { ?>
         <form class="navbar-form navbar-right" action="login.php" method="post">
           <div class="form-group">
             <input type="text" placeholder="User" class="form-control" name="user">
           </div>
           <div class="form-group">
             <input type="password" placeholder="Password" class="form-control" name="password">
           </div>
           <button type="submit" class="btn btn-success" name="signin">Sign in</button>
           <button type="submit" class="btn btn-danger" name="signup">Sign up</button>
         </form>
<?php } ?>
       </div><!--/.nav-collapse -->
     </div>
   </nav>

   <!-- Main jumbotron for a primary marketing message or call to action -->
   <!--
   <div class="jumbotron">
   </div>
   -->
   <div class="container">
<?php
include("$page.php");
?>
     </div>


     <hr>

     <footer>
       <p>Mortal Magi Agents 2015</p>
     </footer>
   </div> <!-- /container -->


   <!-- Bootstrap core JavaScript
   ================================================== -->
   <!-- Placed at the end of the document so the pages load faster -->
   <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
   <script src="js/bootstrap.min.js"></script>
 </body>
</html>