I've below HTML code which I intend to use with index.php file but there seems a problem.
<!-- nav bar -->
<nav id="top">
<nav class="navbar navbar-xs navbar-custom">
<div class="container-fluid" >
<div class="nav pull-right">
<font face="bebas">
<ul class="list-inline">
<li><a href="#"> 123456789 </a></li>
<li class="dropdown"><a href="#" title="My Account" class="dropdown-toggle" data-toggle="dropdown"><i class="fa fa-user"></i> My Account <span class="caret"></span></a>
<ul class="dropdown-menu dropdown-menu-right">
<li><a href="#">Register</a></li>
<li><a href="#">Login</a></li>
</ul>
</li>
<li><a href="#" id="wishlist-total" title="Wish List (0)"><i class="fa fa-heart"></i> Wish List (0)</a></li>
<li><a href="#" title="Shopping Cart"><i class="fa fa-shopping-cart"></i> Shopping Cart</a></li>
<li><a href="#" title="Checkout"><i class="fa fa-share"></i> Checkout</a></li>
</ul>
</div>
</div>
</nav>
</nav>
<!-- searchbar and logo -->
<header id="margin">
<div class="container">
<div class="row">
<div class="col-xs-4">
<div id="logo">
<center> <span class="tab-space"></span> <a href="J:\lawn\home\home2.htm"><img src="J:\lawn\home\artwork\lawn.png" height="42px" /></a>
</div>
</div>
<div class="col-xs-5">
<div id="search" class="input-group">
<input type="text" name="search" value="" placeholder="Search" class="form-control" border-rad>
<span class="input-group-btn">
<button class="btn btn-secondary" type="button" style="border-radius: 0;">Search</button>
</span>
</div>
</div>
<div class="col-xs-3">
</div>
</div>
</div>
</font>
</header>
index.php
<!DOCTYPE html>
<html>
<head>
<title> experiment ground </title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!-- <meta name="viewport" content="width=device=width, initial-scale=1"> omitted to remove unresponsiveness of columns -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<link href="J:\bootstrap\bootstrap-3.3.6-dist\css\bootstrap.min.css" rel="stylesheet" type="text/css">
<link href="J:\bootstrap\bootstrap-3.3.6-dist\css\cutom.css" rel="stylesheet" type="text/css">
<script src="J:\bootstrap\bootstrap-3.3.6-dist\js\bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
</head>
<body>
<?php include('includes\header.html'); ?>
</body>
</html>
i want an output like this but all i am getting is this. is it a problem with using bootstrap or something else entirely. my main purpose is to use include() feature of PHP to make my code minimal. is there any other way I can include headers or footers templates or codes to a PHP page? thank you!