public function save()
 {
     if (isset($_SESSION["perfil"]) && $_SESSION["perfil"] == 'PROFESOR') {
         $obj = new unidad();
         if ($_POST['idunidad'] == '') {
             $p = $obj->insert($_POST);
             if ($p[0]) {
                 header('Location: index.php?controller=cursosemestre');
             } else {
                 $data = array();
                 $view = new View();
                 $data['msg'] = $p[1];
                 $data['url'] = 'index.php?controller=cursosemestre';
                 $view->setData($data);
                 $view->setTemplate('../view/_Error_App.php');
                 $view->setLayout('../template/Layout.php');
                 $view->render();
             }
         } else {
             $p = $obj->update($_POST);
             if ($p[0]) {
                 header('Location: index.php?controller=cursosemestre');
             } else {
                 $data = array();
                 $view = new View();
                 $data['msg'] = $p[1];
                 $data['url'] = 'index.php?controller=cursosemestre';
                 $view->setData($data);
                 $view->setTemplate('../view/_Error_App.php');
                 $view->setLayout('../template/Layout.php');
                 $view->render();
             }
         }
     } else {
         $obj = new unidad();
         if ($_POST['idunidad'] == '') {
             $p = $obj->insert($_POST);
             if ($p[0]) {
                 header('Location: index.php?controller=unidad');
             } else {
                 $data = array();
                 $view = new View();
                 $data['msg'] = $p[1];
                 $data['url'] = 'index.php?controller=unidad';
                 $view->setData($data);
                 $view->setTemplate('../view/_Error_App.php');
                 $view->setLayout('../template/Layout.php');
                 $view->render();
             }
         } else {
             $p = $obj->update($_POST);
             if ($p[0]) {
                 header('Location: index.php?controller=unidad');
             } else {
                 $data = array();
                 $view = new View();
                 $data['msg'] = $p[1];
                 $data['url'] = 'index.php?controller=unidad';
                 $view->setData($data);
                 $view->setTemplate('../view/_Error_App.php');
                 $view->setLayout('../template/Layout.php');
                 $view->render();
             }
         }
     }
 }
 public function create()
 {
     $obj = new unidad();
     $tem = new tema();
     $obj->insert($_POST);
     $tem->insert($_POST);
 }