Instruction require

Bonjour, je vous contacte car j'ai un problème d'inclusion de page.
J'ai donc un code source.
Ce code source, je souhaite le divisié en 3*:
1 header.php
2 index.php
3 footer.php
De plus, il y a un fichier Css
j'utilise le logiciel Notepad++

les 3 fichiers sont sur mon bureau.
J'utilise un require pour connecter ses pages entre elles.
Cela ne fonctionne pas

Mon code est le suivant ( je ne met pas le fichier style.css car trop long )

index.php

Code:

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<?php 
require ("header.php"); 
?>  
 
 
		<div class="home">
			<div class="row">
				<div class="wrap">
					<div class="box">
						<div class="product full">
							<a href="#">
								<img src="stylesheets/img/image.png">
							</a>
							<div class="description">
								Apple, <strong>Ipad :</strong>
								<a href="#" class="price">1500,00 €</a>
							</div>
							<a href="#" class="gift">
								Gift
							</a>
							<div class="rating">
								<span>Rating :</span>
								<ul>
									<li><a href="#">1</a></li>
									<li><a href="#">2</a></li>
									<li><a href="#">3</a></li>
									<li><a href="#">4</a></li>
									<li><a href="#" class="off">5</a></li>
								</ul>
							</div>
							<a class="add" href="#">
								add
							</a>
						</div>
					</div>
					<div class="box">
						<div class="product full">
							<a href="#">
								<img src="stylesheets/img/image.png">
							</a>
							<div class="description">
								Apple, <strong>Ipad :</strong>
								<a href="#" class="price">1500,00 €</a>
							</div>
							<a href="#" class="gift">
								Gift
							</a>
							<div class="rating">
								<span>Rating :</span>
								<ul>
									<li><a href="#">1</a></li>
									<li><a href="#">2</a></li>
									<li><a href="#">3</a></li>
									<li><a href="#">4</a></li>
									<li><a href="#" class="off">5</a></li>
								</ul>
							</div>
							<a class="add" href="#">
								add
							</a>
						</div>
					</div>
					<div class="box last">
						<div class="product full">
							<a href="#">
								<img src="stylesheets/img/image.png">
							</a>
							<div class="description">
								Apple, <strong>Ipad :</strong>
								<a href="#" class="price">1500,00 €</a>
							</div>
							<a href="#" class="gift">
								Gift
							</a>
							<div class="rating">
								<span>Rating :</span>
								<ul>
									<li><a href="#">1</a></li>
									<li><a href="#">2</a></li>
									<li><a href="#">3</a></li>
									<li><a href="#">4</a></li>
									<li><a href="#" class="off">5</a></li>
								</ul>
							</div>
							<a class="add" href="#">
								add
							</a>
						</div>
					</div>
				</div>
			</div>
			<div class="row last">
				<div class="wrap">
					<div class="box">
						<div class="product full">
							<a href="#">
								<img src="stylesheets/img/image.png">
							</a>
							<div class="description">
								Apple, <strong>Ipad :</strong>
								<a href="#" class="price">1500,00 €</a>
							</div>
							<a href="#" class="gift">
								Gift
							</a>
							<div class="rating">
								<span>Rating :</span>
								<ul>
									<li><a href="#">1</a></li>
									<li><a href="#">2</a></li>
									<li><a href="#">3</a></li>
									<li><a href="#">4</a></li>
									<li><a href="#" class="off">5</a></li>
								</ul>
							</div>
							<a class="valid" href="#">
								add
							</a>
						</div>
					</div>
					<div class="box">
						<div class="product full">
							<a href="#">
								<img src="stylesheets/img/image.png">
							</a>
							<div class="description">
								Apple, <strong>Ipad :</strong>
								<a href="#" class="price">1500,00 €</a>
							</div>
							<a href="#" class="gift">
								Gift
							</a>
							<div class="rating">
								<span>Rating :</span>
								<ul>
									<li><a href="#">1</a></li>
									<li><a href="#">2</a></li>
									<li><a href="#">3</a></li>
									<li><a href="#">4</a></li>
									<li><a href="#" class="off">5</a></li>
								</ul>
							</div>
							<a class="add" href="#">
								add
							</a>
						</div>
					</div>
					<div class="box last">
						<div class="product full">
							<a href="#">
								<img src="stylesheets/img/image.png">
							</a>
							<div class="description">
								Apple, <strong>Ipad :</strong>
								<a href="#" class="price">1500,00 €</a>
							</div>
							<a href="#" class="gift">
								Gift
							</a>
							<div class="rating">
								<span>Rating :</span>
								<ul>
									<li><a href="#">1</a></li>
									<li><a href="#">2</a></li>
									<li><a href="#">3</a></li>
									<li><a href="#">4</a></li>
									<li><a href="#" class="off">5</a></li>
								</ul>
							</div>
							<a class="add" href="#">
								add
							</a>
						</div>
					</div>
				</div>
			</div>
		</div>
		<div id="pagination">
			<ul class="wrap">
				<li><a href="#"> Prev </a></li>
				<li class="page"> Page : <a href="#">2</a> of 3</li>
				<li><a href="#"> Next</a></li>
			</ul>
		</div>
	<?php require "footer.php"; ?>

Mon code header.php

Code:

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<!DOCTYPE html>
<html>
<head>
	<title>Ecommerce template</title>
	<meta charset="utf-8">
	<link rel="stylesheet" href="style.css" type="text/css" media="screen" charset="utf-8">
</head>
 
<body>
 
<div id="header">
	<div class="wrap">
		<div class="menu">
				<a href="#" class="logo">Shoppi</a>
				<h1>The best online store, for real.</h1>
				<ul class="panier">
					<li class="caddie"><a href="#">Caddie</a></li>
					<li class="items">
						ITEMS
						<span>13</span>
					</li>
					<li class="total">
						TOTAL
						<span>1320.09 €</span>
					</li>
				</ul>
		</div>
	</div>
</div>
 
<div id="subheader">
	<div class="wrap">
		<h2>Welcome visitor you can <a href="#">login</a> or <a href="#">create an account</a> .</h2>
	</div>
</div>
 
 
<div id="wrap">
 
	<div id="menu">
		<ul class="wrap">
			<li> <a href="#">All Categories</a> </li>
			<li> <a href="#">Electronics</a> </li>
			<li> <a href="#">Fashion</a> </li>
			<li> <a href="#">Entertainement</a> </li>
			<li> <a href="#">Motors</a> </li>
			<li> <a href="#">Outdoors</a> </li>
			<li> <a href="#">Gift</a> </li>
			<li> <a href="#">Jewelry</a> </li>
			<li> <a href="#">Shoes</a> </li>
			<li> <a href="#">Computers</a> </li>
		</ul>
	</div>
	<div id="ariane">
		<div class="wrap">		You are right here : Home » <a href="#">Electronics</a>
		</div>
		<div id="main" class="clearfix">
 
	</div>

Mon code footer.php

Code:

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</div>
</div>
 
<div id="footer">
<div class="wrap">
<p>© Shoppi, a small ecommerce template • Handcrafted by Jeremy Jones / @jeijones#</p>
</div>
</div>
 
 
 
</body>
 
</html>

Merci d'avance pour vos réponses