$results = array('success' => false, 'datas' => null, 'mess' => null);
$nom = $form->crearElement("nom");
$nom->setTipus("texte");
$nom->setRestriccio(true);
$grup = $form->crearElement("grup");
$grup->setTipus("texte");
$grup->setRestriccio(true);
$tarifa_dia = $form->crearElement("tarifa_dia");
$tarifa_dia->setTipus("numeric");
$tarifa_dia->setRestriccio(false);
if (count($_POST)) {
    if ($form->valida($_POST)) {
        $infos = array();
        array_push($infos, $grup, $tarifa_dia, $nom);
        $model = new Model();
        $model->setInfos($infos);
        if ($model->save()) {
            include_once $dir . "/../classes/Llistes/LlistaModels.php";
            $models = new LlistaModels();
            $llista = array();
            $i = 0;
            foreach ($models->getModels() as $m) {
                $llista[$i]['codi'] = $m->CODI;
                $llista[$i]['nom'] = $m->NOM;
                $i++;
            }
            $results['success'] = true;
            $results['datas'] = $llista;
            $results['mess'] = "S'ha guardat el model correctament";
        } else {
            $results['mess'] = "S'ha produit un error guardant el model";