if (isset($_POST['date']) && !empty($_POST["date"])) {
        $date = $_POST['date'];
    } else {
        $alert = "Pas de date de diplome entrée";
        echo $alert;
        return false;
    }
    if (isset($_POST['intitule']) && !empty($_POST["intitule"])) {
        $diplome = $_POST['intitule'];
    } else {
        $alert = "Veuillez entrer un nom de diplome";
        echo $alert;
        return false;
    }
    $ajoutDiplome = new TraitementBdd();
    $ajoutDiplome->ajoutDiplome($diplome, $date);
}
if (isset($_POST['valid_stage'])) {
    if (isset($_POST["date_debut_stage"]) && !empty($_POST['date_debut_stage'])) {
        $date_debut_stage = $_POST['date_debut_stage'];
    } else {
        $date_debut_stage = "non défini";
    }
    if (isset($_POST["date_fin_stage"]) && !empty($_POST['date_fin_stage'])) {
        $date_fin_stage = $_POST['date_fin_stage'];
    } else {
        $date_fin_stage = "non défini";
    }
    if (isset($_POST['contenu_stage']) && !empty($_POST['contenu_stage'])) {
        $contenu_stage = $_POST['contenu_stage'];
    } else {