我正在尝试学习如何向用户显示一条消息,通知他们尝试从数据库中删除内容页面的错误或成功消息。我想知道到目前为止我是否做得对。如果我是我在视图中所做的事情?
控制器
/**
* Content_pages::delete_content_page()
*
* Deletes a content page from the list of content pages.
*
* @param string $content_page_id The id of the content page being deleted.
* @return void
*/
public function delete_content_page($content_page_id)
{
$status = 'unprocessed';
$title = 'Action Unprocessed';
$message = 'The last action was rendered unprocessed. Please try again.';
if (isset($content_page_id) && is_numeric($content_page_id))
{
$content_page_data = $this->content_page->get($content_page_id);
if (!empty($content_page_data))
{
$this->content_page->update($content_page_id, array('status_id' => 3));
if ($this->db->affected_rows() > 0)
{
$status = 'success';
$message = 'The content page has been successfully deleted.';
$title = 'Content Page Deleted';
}
else
{
$status = 'error';
$message = 'The content page was not deleted successfully.';
$title = 'Content Page Not Deleted';
}
}
}
$output = array('status' => $status, 'message' => $message, 'title' => $title);
$this->session->set_flashdata('output', $output);
redirect('content-pages/list');
}
/**
* Content_pages::list_content_pages()
*
* List all of the content pages found in the database.
*
* @return void
*/
public function list_content_pages()
{
$content_pages = $this->content_page->get_all();
$data['output'] = $this->session->flashdata('output');
$this->template
->title('Content Pages')
->set('content_pages', $content_pages)
->build('content_pages_view', $data);
}
我的问题出在视图中,因为它显示为默认的空消息,所以我试图弄清楚如何在视图首次呈现时不显示它,并且只有在有消息要显示时才显示它。
if (isset($output))
{
if ($output['status'] == 'success')
{
echo '<div class="alert alert-success">';
}
elseif ($output['status'] == 'error')
{
echo '<div class="alert alert-error">';
}
else
{
echo '<div class="alert alert-error">';
}
echo '<button type="button" class="close" data-dismiss="alert">×</button>';
echo '<strong>' . $output['title'] . '</strong>' . $output['message'];
echo '</div>';
}
?>