php XPath对XML文件查找及修改实现代码

<?php
/*
<?xml version="1.0" encoding="utf-8"?>
<article>
<item>
<title name="t1">11</title>
<content>content1</content>
<pubdate>2009-10-11</pubdate>
</item>
<item>
<title name="t2">title2</title>
<content>content2</content>
<pubdate>2009-11-11</pubdate>
</item>
</article>
*/
if(!function_exists(l)) {
function l() {
echo <br/>***********************************<br />;
}
}
if(file_exists(test10_12.xml)) {
$xml = simplexml_load_file(test10_12.xml);

//利用xpath方法查找节点位置
$query = $xml->xpath(//title[@name="t1"]/ancestor::item);

var_dump($query);
l();

//测试在title节点下新增子节点new
$query[0]->title->addChild(new,new);

//测试在title节点下新增属性fuck
$query[0]->title->addAttribute(fuck,fuck you);

//测试修改content节点值为hello,world
$query[0]->content = hello,world;

//不解释,你懂的
$query[0]->asXML("10.xml");
}
?>