if (ctype_alpha($_POST["prenom"])) {
        $prenom = $_POST["prenom"];
    } else {
        echo '<img class = "icone" src="image/erreur.png" alt="Erreur"/><b>Prenom invalide</b> : il doit être de type alphabétique<br />';
    }
}
if (empty($nom) or empty($prenom)) {
    ?>

<form method="post" action="#">
<fieldset>
  <legend>Inscription</legend>
  <p><label for="nom" >Nom : </label><input type="text" id="nom" name="nom" /></p>
  <p><label for="prenom" >Prénom : </label><input type="text" id="prenom" name="prenom" /></p>
  <p><label for="mail" >Mail : </label><input type="text" id="mail" name="mail" /></p>
  <p><label for="log" >Login : </label><input type="text" id="log" name="log" /></p>
  <p><label for="pwd" >Mot de passe : </label><input type="password" id="pwd" name="pwd" /></p>
  <p><label for="pwd2" >Confirmation : </label><input type="password" id="pwd2" name="pwd2" /></p>
  <input type="submit" value="Valider" />
</fieldset>
</form>

<?php 
} else {
    $num = $manager->getNumMaxPersonne()->per_num + 1;
    $grainDeSel = 'XOURR\'LINE';
    $crypt = md5(md5($_POST["pwd"]) . $grainDeSel);
    $personne = new Personne(array('per_num' => $num, 'per_nom' => $_POST["nom"], 'per_prenom' => $_POST["prenom"], 'per_mail' => $_POST["mail"], 'per_admin' => "", 'per_login' => $_POST["log"], 'per_pwd' => $crypt));
    $manager->add($personne);
    header("Refresh : 0 ; URL = index.php");
}