<test:list limit="5" order="updatetime" tname="user" field="uname">
<test:a href=""></test:a>
<test:a></test:a>
</test:list>
问题是如果a标签不存在参数的话，就根据a标签解析赋参数，否则就根据自定义参数解析，经过我的测试无参和有参只能存在其中一种，怎么能让两个同时存在呢？

public function _a($attr, $content) {
$tag = $this->parsexmlAttr ( $attr, 'a' );
$parseStr = '<a ';
if(!empty($tag['title']))
$parseStr .= "title='{$tag['title']}' ";
elseif(isset($title) && !empty($title))
$parseStr .= "title='测试1' ";

if(!empty($tag['href'])) {
$parseStr .= "href='{$tag['href']}' ";
} elseif(!empty($tag['type'])) {
$parseStr .= "href='".'<?php echo !empty($field["url"])?$field["url"]:$field["picurl"];?>'."' ";
}

if(!empty($tag['target'])) $parseStr .= "target='{$tag['target']}' ";
if(!empty($tag['class'])) $parseStr .= "class='{$tag['class']}' ";
if(!empty($tag['style'])) $parseStr .= "style='{$tag['style']}' ";

$parseStr .= '>';

if(!empty($content)) {
$parseStr .= $content;
} else {
$parseStr .= '<?php echo $field["title"];?>';
}
$parseStr .= '</a>';
return $parseStr;
}
a标签没有属性的时候，自动拼接，有属性就获取属性显示。