首先在/models/article.php里增加方法

	public function get_radom_article(){
		$table1 = $this->get_table('article') ;
		$sql = 'SELECT * 
FROM `'.$table1 .'` AS t1 JOIN (SELECT ROUND(RAND() * ((SELECT MAX(id) FROM `'.$table1 .'`)-(SELECT MIN(id) FROM `'.$table1 .'`))+(SELECT MIN(id) FROM `'.$table1 .'`)) AS id) AS t2 
WHERE t1.id >= t2.id 
ORDER BY t1.id LIMIT 10';//效率比order by radom高
 return $this->query_all($sql);
		
	}

然后在要显示随机文章页面的app下的模块的main函数的方法里加入

TPL::assign('radom_articles', $this->model('article')->get_radom_article());

然后写一个页面 建议这个路径 views/default/block/sider_radom_post.tpl.htm 里写上

<?php if ($this->radom_articles) { ?>
	<!-- 相关问题 -->
	<div class="aw-mod aw-text-align-justify question-related-list"  style="padding:10px;">
		<div class="mod-head">
			<h3>随机文章</h3>
		</div>
		<div class="mod-body">
			<ul style="font-size:12px; color:#999;">
				<?php 
				$indx = 1;
				foreach($this->radom_articles AS $key => $val) { ?>
				<li><span class='artLi artLi<?php echo $indx; ?>'><?php echo $indx++; ?></span><a  href="a/<?php echo $val['id']; ?>.html" title="<?php echo $val['title']; ?>"><?php echo  $val['title']; ?></a></li>
				<?php } ?>
			</ul>
		</div>
	</div>
	<!-- end 相关问题 -->
	<?php } ?>

最后就可以啦。 参考效果如:http://onijiang.com/的右侧栏