PHP怎么写XML文件

PHP如何写XML文件？
已有一个XML文件，代码如下：

XML code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?xml version="1.0" encoding="GB2312"?><appconfig>  <com>COM1</com>  <phone>10086</phone>  <content>测试</content></appconfig>

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PHP code

$phone=123;$xmlDoc = new DOMDocument();$xmlDoc->load("bb.xml");$xml = new SimpleXMLElement($xmlDoc->saveXML());$xml->Phone = $phone;file_put_contents('bb.xml', $xml->asXML());<br><font color="#e78608">------解决方案--------------------</font><br>

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PHP code

<?php $xml = new DOMDocument("1.0","GB2312");//实例化domdocument类$xml->load('test3.xml');//加载xml文件$list=$xml->getElementsByTagName('Phone');$phone='iphone';$list->item(0)->nodeValue=$phone;  $xml->save("test3.xml");//保存?><br><font color="#e78608">------解决方案--------------------</font><br>

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PHP code

<?phprequire_once ("xmlparse.php");    $xml = new DOMDocument("1.0","GB2312");$xml->load("你的xml的路径");$list=$xml->getElementsByTagName('Phone');$list->item(0)->nodeValue=$phone;  $xml->save("你的xml的路径");//保存?><div class="clear">
                 
              
              
        
            </div>

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