public function actionChang_password()
 {
     $session = Yii::$app->session;
     $session->open();
     $id = $session['user_id'];
     $sign = Sign::find()->where(['user_id' => $id])->one();
     if (Yii::$app->request->isAjax) {
         $data = Yii::$app->request->post();
         $newPassword1 = explode(":", $data['newPassword1']);
         $newPassword1 = $newPassword1[0];
         $newPassword1 = md5($newPassword1);
         $sign->password = $newPassword1;
         $sign->save();
         return;
     } else {
         echo 'error ajax';
     }
 }
 public function actionEdit_travel($id = null)
 {
     $this->layout = 'bank';
     $travel = Sign::find()->all();
     return $this->render('edit_travel', ['travel' => $travel, 'id' => $id]);
 }