从codeigniter中的另一个函数获取变量

Question

我想问一下如何从其他函数中但仍在同一控制器中的变量获取数据。...

这是函数，将在其中发送名为$ whs的变量

function deliver($whs_id)
{
  $whs = $whs_id; // here is variable to pass

  $this->cart->destroy();
  $this->template->set_title('Package');
  $this->breadcrumbs->push('Package', '/Package');
  $this->breadcrumbs->push('Create Package', '/pacakge/index');


 $data['item'] = $this->MY_Model->join2_where('box_stock','product_code','box_product','product_code','whs_id',$whs_id)->result();
 $this->template->load('templates/Template', $this->folder.'/item', $data);

}

function save()
{
    $whs2 =$whs; // i will get data in here

        // judul halaman
  $this->template->set_title('Package');
        // Breadcrumbs
  $this->breadcrumbs->push('Package', 'package');
  $this->breadcrumbs->push('Save', '/package/save');
        // JS Init
  $js_init =  "";


  }

如何获取同一控制器中另一个函数中的数据？