Bonjour voici ma page menu.php
<body>
		<div id="wrapper">
			<nav class="navbar navbar-default navbar-cls-top " role="navigation" style="margin-bottom: 0">
				<div class="navbar-header">
					<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".sidebar-collapse">
						<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.html">Gestion des Adh&eacute;rents</a> 
				</div>
				<div style="color: white;
					padding: 15px 50px 5px 50px;
					float: right;
					font-size: 16px;"> 
					<a href="logout_nova.php" class="btn btn-danger square-btn-adjust">Logout</a>
					<?php echo ($user->PRENOM . " " . $user->NOM)?>
				</div>
			</nav>   
			<!-- /. NAV TOP  -->
			<nav class="navbar-default navbar-side" role="navigation">
				<div class="sidebar-collapse">
					<ul class="nav" id="main-menu">
						<li class="text-center">
							<div class="inputfile">
								<?php include("info_connex_nova.php");?>
							</div>
							<img src="assets/img/find_user.png" class="user-image img-responsive"/>
						</li>

...
</nav> 
			<!-- /. NAV SIDE  -->
			<div id="page-wrapper" >
				<nav role="navigation" class="navbar navbar-inverse">
					<!-- Brand and toggle get grouped for better mobile display -->
					<div class="navbar-header">
						<button type="button" data-target="#navbarCollapse" data-toggle="collapse" class="navbar-toggle">
							<span class="sr-only">Toggle navigation</span>
							<span class="icon-bar"></span>
							<span class="icon-bar"></span>
							<span class="icon-bar"></span>
						</button>
						<a href="#" class="navbar-brand">Menus</a>
						<form role="search" class="navbar-form navbar-right">
							<div class="form-group">
								<input type="text" placeholder="Search" class="form-control">
							</div>
						</form>
					</div>
					<!-- Collection of nav links, forms, and other content for toggling -->
					<div id="navbarCollapse" class="collapse navbar-collapse">
						<ul class="nav navbar-nav">
							<li><a href="accueil_admin_nova.php">Menu Admin</a></li>
							<li><a href="#">Menu Central</a></li>
							<li><a href="#">Menu Central Admin</a></li>
							<li><a href="#">Menu Sport</a></li>
							<li><a href="#">Menu Badges</a></li>
						</ul>
					</div>
				</nav>	
				<div id="page-inner">
					<div id="page-container">
					
					</div>
				
				</div>

et voici une page de requétage "req.php"
	<script language="javascript" src="menu.js"></script>
		<meta name="generator" content="Namo WebEditor"> 
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		
		<div id="page-container">
			<form name="adhenreg" method="post" action="adher_enreg_process.php" onSubmit="return verif_formulaire()">
				<fieldset>
					<legend><b><font color="white">Enregistrement d'un Adhérent    </font></b></legend>
					<table>
						<tr>
							<td width="195">
								<p>
									<font size="2">Club
										<sup>
											*
										</sup>
									</font>
								</p>
							</td>
							<td width="284" colspan="2">
								<p><span  style="background-color:yellow;"><font size="2"><select name="Filiale" size="1" style="font-family:Arial; font-size:10; background-color:yellow;">
								<?php
								$requete2 = mysql_query("SELECT * FROM lieux");					
								while ($lieux = mysql_fetch_row($requete2))
									{
									echo "<option value='".$lieux[1]."'";
									if(isset($_POST['Filiale'])){if ($lieux[1]==$_POST['Filiale'] ) { echo " SELECTED";}}
									echo ">".$lieux[2]."</option>";
									}
								?>
								</select></font></span></p>
							</td>
							<td width="151">

voici ma page menu.php
upload/60994-req-alsa.PNG
et voici ma page req.php
upload/60994-req.PNG
ce que je veux c que le contenue de ma page de requétage soit dans la div "page-inner"
Comment faire?
merci
Et bien, en admettant que les fichiers soient au même niveau, dans la div#page-container de la page menu.php il faut mette soit un include :
<div id="page-container">
	<?php include 'req.php'; ?>
</div>

Soit un require :
<div id="page-container">
	<?php require 'req.php'; ?>
</div>

Je vous laisse découvrir la documentation de ces fonctions dans le manuel php.