yii2 widget示例

<?php
namespace app\components;

use yii\base\Widget;
use yii\helpers\Html;

class RctReplyWidget extends Widget{
    public $commentDataProvider;

    public function init(){
        parent::init();
    }

    public function run(){
        $commentString='';
         foreach($this->commentDataProvider as $comment){
             $commentString.='<div class="post">'.
                            '<div class="title">'.
                            '<p style="color:#777777;font-style:italic;">'.nl2br($comment->content).'</p>'.
                            '<p class="text-right"><span class="glyphicon glyphicon-user" aria-hidden="true"></span>'.Html::encode($comment->author).'</p>'.
                            '<p style="font-size:8pt;color:blue">《 <a href="'.$comment->post->url.'">'.Html::encode($comment->post->title).'</a>》</p>'.
                            '<hr></div></div>';
         }
    return $commentString;
    }
}

<?= RctReplyWidget::widget(['commentDataProvider' => $commentDataProvider]); ?>