问在Codeigniter中发布同一控制器两次时使用flashdata

EN

class edit extends ci_controller
{

function user_academics($id = NULL)
    {
        if(isset($id) == FALSE)     //if link is ./edit/user_academics
        {
            $id = NULL;
            $link = site_url('profile');
            show_error("Invalid Page Request! <a href='$link' Go to Profile </a>");
        }

        $user_id = $this->session->userdata('user_id');        
        $data['fill'] = $this->edit_model->get_user_academics($id);

        if($user_id != $data['fill']['user_id'])    // check if logged in user is accessing his record or others
        {
             $link = site_url('profile');
            show_error("This is an Invalid Request ! <a href='$link'>Go to Profile </a>");
        }
        else // actual work starts here
        {
            $this->session->set_flashdata('ua_id',$id); // update_academics will get this data

            $this->load->view('edit/edit_3_view',$data);

        }
    }

 function update_academics()
    {
        $ua_id =  $this->session->flashdata('ua_id');   // flash data used here .
        if( !$ua_id )
        {
            show_error('Sorry, This request is not valid!');

        }
      $academics = array( 
            // All post values
        );

        $this->edit_model->update_user_academics($academics,$ua_id);
        //print_r($academics);
        redirect('profile');

    }

}