PHP /MYSQL

<?php

include  'includes\db.php';
   $message='';
print_r($_POST);
$date = date('Y-m-d h:i:s');
$commentaire = mysql_real_escape_string($_POST['Commentaire']);
$email=$_POST['Email'];
$sujet=$_POST['Sujet'];
$nom=$_POST['nom'];
 if(isset($_POST['sent']))
 {



$sql = "INSERT INTO `reclamation_user`(`Email`, `Sujet`, `Commentaire`, `date`, `nom`) VALUES ( $email, $sujet , $commentaire, $date , $nom )";

if ($conn->query($sql) === TRUE)
{
 $message= '<div class="alert alert-info"><strong>Merci!</strong> votre message a bien été envoyé.</div>';
} 
 
else
 {
$message=  '<div class="alert alert-danger">  <strong>Erreur!</strong> votre message n a pas été envoyé. veuillez réessayer plus tard.</div>';
}

}
else
 {

$message=  '<div class="alert alert-danger"><strong>Erreur!</strong></div>'; 
}
$conn->close();

?>

         <form role="form" action="" method="post">
                 

                      <?php  $message;  ?>
                      
                           <div class="form-group">
                            <label for="name" class="col-sm-2 control-label">Nom</label>
                            <div class="col-sm-8">
                                <input type="text" class="form-control" name="nom" placeholder="Entrez ton nom" id="name">
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="email" class="col-sm-2 control-label">Email</label>
                            <div class="col-sm-8">
                                <input type="email" class="form-control" name="Email" placeholder=" Entrez ton adresse Email " id="email">
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="subject" class="col-sm-2 control-label">Sujet</label>
                            <div class="col-sm-8">
                                <input type="text" class="form-control" name="Sujet" placeholder="Entrez ton sujet" id="subject">
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="comments" class="col-sm-2 control-label">Commentaire</label>
                            <div class="col-sm-8">
                                <textarea class="form-control" rows="10" name="Commentaire" style="resize:none;"></textarea>
                            </div>
                        </div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label"></label>
                            <div class="col-sm-8">
                                <input type="submit"   name="sent" value="Validé" id="vld"  \>
                            </div></div> </form>