Php 如何使用细枝递归显示注释？

我正在使用Silex框架重写一个应用程序。在这个应用程序中，用户可以对帖子和评论进行评论。在非MVC应用程序中，受启发，我这样写：

function display_comments($postid, $parentid=0, $level=0){
   // Get the current comment from DB and display with HTML code
   display_comments($needid, $comment['id'], $level+1);
}

但是，在Silex应用程序中，我希望从存储库中的数据库中检索它们的注释，将其发送到控制器中的细枝模板，最后在模板中显示HTML代码。这使得以前的解决方案不兼容

Silex中解决此问题的好方法是什么？我应该在视图中放置什么，在控制器中放置什么，在模型中放置什么

编辑 我现在在控制器中编写了函数：

$app->get('/needdetail/{id}', function ($id) use ($app) {
    $need = $app['need']->findNeed($id);

    function display_comments($app, $needid, $comments=array(), $parentid=0, $level=0){
       $replies = $app['comment']->findByNeed($needid, $parentid);
       foreach($replies as $reply){
            $reply['level'] = $level;
            array_push($comments, $reply);
            display_comments($app, $needid, $comments, $reply['id'], $level+1);
       }
       return $comments;
    }

    return $app['twig']->render('needdetail.html', array('need' => $need, 'comments' => display_comments($app, $id)));
})

---

现在显示了级别0的注释，但没有显示更深级别的注释。

我使用稍微不同的方法获得了所需的结果。控制器和视图都包含一个递归函数：

控制器：

$app->get('/needdetail/{id}', function ($id) use ($app) {
   $need = $app['need']->findNeed($id);

   function get_comments($app, $needid, $parentid=0){
      $comments = array();
      $replies = $app['comment']->findByNeed($needid, $parentid);
      foreach($replies as $comment){
         $comment['replies'] = get_comments($app, $needid, $comment['id']);
         array_push($comments, $comment);    
      }
      return $comments;
   }

   return $app['twig']->render('needdetail.html', array('need' => $need, 'comments' => get_comments($app, $id)));
})

{% for comment in comments %}
   {% include 'comment.html' with {'level': 0} %}            
{% endfor %}

<div class="comment">
   //Comment HTML
</div>
{% if comment.replies %}
   {%for reply in comment.replies %}
      {% include 'comment.html' with {'comment': reply, 'level': level+1} %}
   {% endfor %}
{% endif %}

查看：

$app->get('/needdetail/{id}', function ($id) use ($app) {
   $need = $app['need']->findNeed($id);

   function get_comments($app, $needid, $parentid=0){
      $comments = array();
      $replies = $app['comment']->findByNeed($needid, $parentid);
      foreach($replies as $comment){
         $comment['replies'] = get_comments($app, $needid, $comment['id']);
         array_push($comments, $comment);    
      }
      return $comments;
   }

   return $app['twig']->render('needdetail.html', array('need' => $need, 'comments' => get_comments($app, $id)));
})

{% for comment in comments %}
   {% include 'comment.html' with {'level': 0} %}            
{% endfor %}

<div class="comment">
   //Comment HTML
</div>
{% if comment.replies %}
   {%for reply in comment.replies %}
      {% include 'comment.html' with {'comment': reply, 'level': level+1} %}
   {% endfor %}
{% endif %}

Comment.html:

$app->get('/needdetail/{id}', function ($id) use ($app) {
   $need = $app['need']->findNeed($id);

   function get_comments($app, $needid, $parentid=0){
      $comments = array();
      $replies = $app['comment']->findByNeed($needid, $parentid);
      foreach($replies as $comment){
         $comment['replies'] = get_comments($app, $needid, $comment['id']);
         array_push($comments, $comment);    
      }
      return $comments;
   }

   return $app['twig']->render('needdetail.html', array('need' => $need, 'comments' => get_comments($app, $id)));
})

{% for comment in comments %}
   {% include 'comment.html' with {'level': 0} %}            
{% endfor %}

<div class="comment">
   //Comment HTML
</div>
{% if comment.replies %}
   {%for reply in comment.replies %}
      {% include 'comment.html' with {'comment': reply, 'level': level+1} %}
   {% endfor %}
{% endif %}

//注释HTML
{%if comment.repress%}
{%用于评论中的回复。回复%}
{%include'comment.html'和{'comment'：回复，'level'：level+1}%}
{%endfor%}
{%endif%}

从控制器递归获取注释结构，然后将其传递给要显示的视图。我尝试了这样做，但现在出现了“Undefined variable:app”错误…您的函数没有返回任何数据也将pass

$app

作为参数：

显示注释（$app，$id）我现在返回数据并将$app作为参数传递。现在会显示级别0的注释，但不会显示更深级别的注释。