Comment utiliser les commentaires PHPCMS ?

{if $allow_comment && module_exists('comment')}
<span style="white-space:pre"></span><iframe src="{APP_PATH}index.php?m=comment&c=index&a=init&commentid={id_encode("content_$catid",$id,$siteid)}&iframe=1" width="100%" height="100%" id="comment_iframe" frameborder="0" scrolling="no" height=&#39;600&#39;></iframe>
{/if}

{pc:content action="lists" catid="$catid" num="25" order="id DESC" page="$page" moreinfo="1"}
{loop $data $r}
{php $comment_tag = pc_base::load_app_class("comment_tag", "comment"); $comment_total = $comment_tag->count(array('commentid'=>'content_'.$catid.'-'.$r[id].'-'.$modelid));}
<li><span class="rt">{date(&#39;Y-m-d H:i:s&#39;,$r[inputtime])}</span>·<a href="{$r[url]}" target="_blank"{title_style($r[style])}>{$r[title]}</a> 评论数:{if $comment_total}{$comment_total}{else}0{/if}</li>
{/loop} 
{$pages}
{/pc}