public function replay()
 {
     $name = isset($_POST['name']) ? trim($_POST['name']) : '';
     $email = isset($_POST['email']) ? trim($_POST['email']) : '';
     $content = isset($_POST['content']) ? trim($_POST['content']) : '';
     $aid = isset($_POST['aid']) ? intval($_POST['aid']) : '';
     // 过滤
     $name = htmlspecialchars($name, ENT_QUOTES);
     $email = htmlspecialchars($email, ENT_QUOTES);
     $content = htmlspecialchars($content, ENT_QUOTES);
     if (empty($name) || empty($email) || empty($content) || empty($aid)) {
         header("refresh:1;url=index.php");
         exit;
     }
     $talk = new ReplayModel();
     $talks = $talk->insertArticleReplay($name, $email, $content, $aid);
     header("refresh:1;url=index.php");
 }