通过php-ci设置flash消息

我正在尝试向数据库中插入一个条目。首先，我检查电子邮件id是否已注册。如果是，将显示一条消息，说明电子邮件id已被获取，否则数据将插入数据库

但即使在页面刷新后，该消息仍会持续显示。我希望它随着页面刷新而消失

    public function register()
    {   

        $this->load->library('form_validation');
        $this->form_validation->set_rules('email','email','required|is_unique[register.email]');
        if($this->form_validation->run() == FALSE){


             ////////////problem is here  ///////////////////////
            $this->load->view('view/login_register');
            $this->session->set_flashdata('message_error','This id is already taken');

        }
        else
        {
           ///$username=$this->input->post('username');
            $email=$this->input->post('email');
            $data= array(

             ////'email'=>$this->input->post('email')
                'email'=>$email,   
          //'password'=>$this->input->post('password'),
                );

            $last_id=$this->model->registeration($data);

            if ($last_id>0) {

                $this->send_email($email);


                $this->session->set_flashdata('message', 'To complete registration, click the link in email we just send you at khadija@precisetech.com.pk');
                redirect('controller/register');
            }


        } 
    if(error_flag == 1){
      return false;
    }else{
      return true;
    }
  }

---

我有另一种方法。详情如下:

• 在控制器中：

  if($this->form_validation->run() == FALSE){
  
  
      $data['msg'] = '<div class="alert alert-dismissable alert-danger"><button class="close" data-dismiss="alert" type="button">×</button>This id is already taken.</div>';
      $this->load->view('view/login_register', $data);
  
  
  }
  

  if（$this->form\u validation->run（）==FALSE）{
  $data['msg']='×此id已被获取'；
  $this->load->view（'view/login\u register'，$data）；
  }
  

• 鉴于此，您可以这样做：

  <?php if(isset($msg)){echo $msg ;} ?>
  

---

设置闪光灯后的加载视图。试着那样做。