Smarty 模板的 if 判断和 foreach 循环

<?php
<{if !empty($ad)}>
    <div class="right-item spaces">
        <ul class="item-list clearfix">
            <{foreach from=$ad key=k item=v}>
            <li>
                <a href="<{$v['url']}>" title="<{$v['name']}>" rel="nofollow" >
                    <img src="<{$v['img']}>" width="270" height="120" alt="<{$v['name']}>">
                </a>
            </li>
            <{/foreach}>
        </ul>
    </div>
<{/if}>
?>