XPath对XML文件查找及修改-PHP源码

<?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);  //debug    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");}/*End of PHP*/