public function login_supervisor()
 {
     if (isset($_POST[tpl_supervisor::username() . '_sup']) && isset($_POST[tpl_supervisor::password() . '_sup'])) {
         $username = $_POST[tpl_supervisor::username() . '_sup'];
         $password = $_POST[tpl_supervisor::password() . '_sup'];
         if (!empty($username) && !empty($password)) {
             $db = new data_base(tpl_supervisor::supervisor(), array(tpl_supervisor::id(), tpl_supervisor::name()), array(tpl_supervisor::username() => $username, tpl_supervisor::password() => $this->hash_password($password), tpl_supervisor::active() => 1));
             $data = $db->get_where();
             if (!empty($data)) {
                 $session = new session_supervisor();
                 $session->new_login_supervisors();
                 $session->set_id_user($data[0][tpl_supervisor::id()]);
                 if ($session->get_login_supervisors()) {
                     echo json_encode(array('valid' => true, 'title' => 'Welcome !!', 'massage' => $data[0][tpl_supervisor::name()]));
                 } else {
                     echo json_encode(array('valid' => false, 'title' => 'Oops !!', 'massage' => 'Was not username & password, please try again'));
                 }
             } else {
                 echo json_encode(array('valid' => false, 'title' => 'Oops !!', 'massage' => 'Was not username & password, please try again'));
             }
         } else {
             echo json_encode(array('valid' => false, 'title' => 'Oops !!', 'massage' => 'Was not username & password, please try again'));
         }
     } else {
         echo json_encode(array('valid' => false, 'title' => 'Oops !!', 'massage' => 'Was not username & password, please try again'));
     }
 }
 public function insert()
 {
     $name = $_POST[tpl_supervisor::supervisor() . '_' . tpl_supervisor::name()];
     $id_college = $_POST[tpl_supervisor::supervisor() . '_' . tpl_supervisor::id_college()];
     $id_university = $_POST[tpl_supervisor::supervisor() . '_' . tpl_supervisor::id_university()];
     $username = $_POST[tpl_supervisor::supervisor() . '_' . tpl_supervisor::username()];
     $password = $_POST[tpl_supervisor::supervisor() . '_' . tpl_supervisor::password()];
     $db = new data_base(tpl_supervisor::supervisor(), array(tpl_supervisor::active() => 0, tpl_supervisor::name() => $name, tpl_supervisor::id_college() => $id_college, tpl_supervisor::id_university() => $id_university, tpl_supervisor::username() => $username, tpl_supervisor::password() => $password));
     $results = $db->add();
     if ($results) {
         echo json_encode(array('valid' => 1, 'title' => 'Successfully !!', 'massage' => 'I\'ve been Add ' . $name));
     } else {
         echo json_encode(array('valid' => 0, 'title' => 'Oops !!', 'massage' => 'Was not add ' . $name . ', please try again'));
     }
 }
"
                               name="<?php 
echo tpl_supervisor::supervisor() . '_' . tpl_supervisor::password() . '_update_password';
?>
"/>
                    </div>

                    <div class="form-group">
                        <label for="">Retype New Password <?php 
echo tpl_supervisor::supervisor();
?>
 : </label>
                        <input type="text" class="form-control"
                               id="<?php 
echo tpl_supervisor::supervisor() . '_' . tpl_supervisor::password() . '_r_update_password';
?>
"
                               name="<?php 
echo tpl_supervisor::supervisor() . '_' . tpl_supervisor::password() . '_r_update_password';
?>
"/>
                    </div>
                    <button type="submit" class="btn btn-success" id="update" name="update">Save</button>
                </form>
                </br>
                <div class="" id="result_massages_update_password"></div>
            </div>
        </div>
    </div>
</div>