99. xpath

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1.xpath

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2.使用

test.xml<?xml version="1.0" encoding="utf-8"?><AAA>    <BBB/>    <CCC/>    <BBB/>    <DDD>        <BBB/>    </DDD>    <CCC>        <DDD>            <BBB/>            <BBB/>        </DDD>    </CCC></AAA>

xpath.php<?php//1.创建 DOMCocument 对象$xmldoc = new DOMDocument();//2.加载 xml$xmldoc->load('test.xml');//3.转成 DOMXPath$domXPath = new DOMXPath($xmldoc);//4.使用 xpath 技术来查询你希望查找的节点//(1)我要找根元素$node_list = $domXPath->query('//BBB');var_dump($node_list);