men

<nav class="navbar navbar-inverse">
    <div class="container-fluid">
        <a class="navbar-brand" href="index.php">E-Sport STI <span class="glyphicon glyphicon-headphones"></span></a>
        <ul class="nav navbar-nav">
            <li class="active"> <a href="index.php">Accueil</a> </li>
            <li> <a href="liste.php">Liste</a> </li>
            <li> <a href="rechercher.php">Recherche</a> </li>
        </ul>
        <?php
        if (isset($_SESSION["pseudo"]))
        {
            echo '<form method="post" action="' . $_SERVER['PHP_SELF'] . '" class="navbar-form navbar-right inline-form">'; ?>
            <div class="form-group">
            <div class="swagggg input-sm form-control "> Bonjour, <?php echo $_SESSION["pseudo"] ?></div>
            <button type="submit" class="btn btn-danger btn-sm" name="deco"><span class="glyphicon glyphicon-chevron-left"></span>Déconnexion</button>
            </div>
            </form><?php
        }
        elseif (!isset($_POST['uservalid']))
        {
            if ((!empty($_GET['error'])) AND (($_GET['error']=="wrong-password")))
            {
                echo '<form method="post" action="' . $_SERVER['PHP_SELF'] . '" class="navbar-form navbar-right inline-form">';
                ?>
                <div class="form-group has-error has-feedback">
                    <label class="control-label" for="idError">Nom d'utilisateur ou mdp incorrect</label>
                    <input type="text" class="input-sm form-control" id="idError" name="user" placeholder="Nom d'utilisateur">
                    <span class="glyphicon glyphicon-remove form-control-feedback"></span>
                </div>
                <div class="form-group has-error has-feedback">
                    <input type="password" class="input-sm form-control" id="idError" name="password" placeholder="Mot de passe">
                    <span class="glyphicon glyphicon-remove form-control-feedback"></span>
                </div>
                    <button type="submit" class="btn btn-danger btn-sm" name="uservalid">Connexion <span class="glyphicon glyphicon-chevron-right"></span> </button><?php
            }
            elseif ((!empty($_GET['error'])) AND (($_GET['error']=="missing-field")))
            {
                echo '<form method="post" action="' . $_SERVER['PHP_SELF'] . '" class="navbar-form navbar-right inline-form">'; ?>
                <div class="form-group has-warning has-feedback">
                    <label class="control-label" for="idWarning">Veuillez remplir tous les champs</label>
                    <input type="text" class="input-sm form-control" id="idWarning" name="user" placeholder="Nom d'utilisateur">
                    <span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>
                </div>
                <div class="form-group has-warning has-feedback">
                    <input type="password" class="input-sm form-control" id="idWarning" name="password" placeholder="Mot de passe">
                    <span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>
                </div>
                <button type="submit" class="btn btn-danger btn-sm" name="uservalid">Connexion <span class="glyphicon glyphicon-chevron-right"></span> </button><?php
            }
            else
            {
                echo '<form method="post" action="' . $_SERVER['PHP_SELF'] . '" class="navbar-form navbar-right inline-form">'; ?>
                <div class="form-group"><input type="text" class="input-sm form-control" name="user" placeholder="Nom d'utilisateur"></div>
                <div class="form-group"><input type="password" class="input-sm form-control" name="password" placeholder="Mot de passe"></div>
                <button type="submit" class="btn btn-danger btn-sm" name="uservalid">Connexion <span class="glyphicon glyphicon-chevron-right"></span> </button> <?php
            }
            echo '</form>';
        }
        if (!isset($_SESSION["pseudo"]) AND (isset($_POST['uservalid'])))
        {
            $pass_hache = sha1($_POST['password']);
            $req = $bdd->prepare('SELECT id FROM admin WHERE user = :user AND password = :password');
            $req->execute(array(
                'user' => $_POST["user"],
                'password' => $pass_hache));
            $resultat = $req->fetch();
            if ($resultat)
            {
                $_SESSION['id'] = $resultat['id'];
                $_SESSION['pseudo'] = $_POST["user"];
                header("Refresh:0");
            }
            elseif ((empty($_POST["user"]) OR (empty($_POST["password"]))) OR (empty($_POST["user"]) AND (empty($_POST["password"]))))
            {
                header('Location: '.$_SERVER['PHP_SELF'].'?error=missing-field');
            }
            elseif (!$resultat) {
                header('Location: '.$_SERVER['PHP_SELF'].'?error=wrong-password');
            }
        }
        if (isset($_POST["deco"]))
        {
            session_destroy();
            header("Refresh:0");
        }
        ?>
    </div>
</nav>