DOM解析xml文件

<span style="font-size:18px;"><?PHP
$dom= new DOMdocument('1.0','UTF-8');
$dom->load("test.xml");
$rs= $dom->getElementsByTagName("title")->item(0)->nodeValue;
print_r($rs);</span>

<span style="font-size:18px;"><?xml version = "1.0" encoding= "utf-8" ?>
<root>
<title>测试标题</title>
<content>测试内容</content>
</root>   </span>