php 修改、增加xml结点属性的实现代码

<?xml version="1.0" encoding="UTF-8" ?>
<clientSet>
<server url="192.168.0.180" port="1935" />
<rootPath value="" />
<homePath value="http://www.aaa.com" />
<helpPath value="help.html" />
<language value="en" />
<theme value="default" />
<visibleMarquee value = "true" />
<visibleWhitePaper value="true" />
<showMemberRoomForGuest value = "true" />
<emotions enabled="true" column="5" autoPlay="false">
<item name="Birthday" src="cartoon/movie/birthday.swf" thumb="cartoon/preview/birthday-small.swf" duration="15"/>
<item name="Boom" src="cartoon/movie/boom.swf" thumb="cartoon/preview/boom-small.swf" duration="6"/>
<item name="Bubble" src="cartoon/movie/bubble.swf" thumb="cartoon/preview/bubble-small.swf" duration="7.5"/>
<item name="Cry" src="cartoon/movie/cry.swf" thumb="cartoon/preview/cry-small.swf" duration="5.4"/>
<item name="Doggie" src="cartoon/movie/doggie.swf" thumb="cartoon/preview/doggie-small.swf" duration="13"/>
<item name="Greeting" src="cartoon/movie/greeting.swf" thumb="cartoon/preview/greeting-small.swf" duration="7.4"/>
<item name="Football" src="cartoon/movie/football.swf" thumb="cartoon/preview/football-small.swf" duration="2.2"/>
</emotions >
</clientSet>

<?
$dom=new DOMDocument('1.0');
$dom->load('x.xml');
$em=$dom->getElementsByTagName('emotions');
$em=$em->item(0);
$items=$em->getElementsByTagName('item');
foreach($items as $a){
foreach($a->attributes as $b){
if($b->nodeValue=='Birthday'){
$a->setAttribute('name','nBirthday');
}
}
}
$t=$dom->createElement('item');
$t->setAttribute('name','x');
$t->setAttribute('src','www.baidu.com');
$t->setAttribute('duration','duration');
$em->appendChild($t);
$dom->save('x.xml');
?>

<?php 
//读取xml 
 $dom=new DOMDocument('1.0'); 
$dom->load('data.xml'); 
$em=$dom->getElementsByTagName('videos');//最外层节点 
$em=$em->item(0); 
$items=$em->getElementsByTagName('video');//节点 
//如果不用读取直接添加的话把下面这一段去掉即可 
foreach($items as $a){ 
foreach($a->attributes as $b){//$b->nodeValue;节点属性的值$b->nodeName;节点属性的名称 
 echo $b->nodeName; 
 echo ":"; 
 echo $b->nodeValue; 
 echo "<br/>"; 
} 
} 
//下面是往xml写入一行新的 
$t=$dom->createElement('video');//<video 
$t->setAttribute('title','1');//<video name="data" 
$t->setAttribute('src','2');//<video name="data" src="2" 
$t->setAttribute('img','1');//<video name="data" img="1" 
$em->appendChild($t);//<video name="data" img="1"/> 
$dom->save('data.xml'); 
?>

<?xml version="1.0"?> 
<videos> 
 <video img="a" url="1" title="1" nickname="1" tag="1" vid="1" star="1"/> 
 <video img="b" url="2" title="2" nickname="2" tag="2" vid="2" star="2"/> 
 <video img="c" url="3" title="3" nickname="3" tag="3" vid="3" star="3"/> 
 <video title="d" src="2" img="1"/> 
</videos>

<?php 
$doc = new DOMDocument(); 
$doc->load('data.xml'); 

//查找 videos 节点 
$root = $doc->getElementsByTagName('videos'); 

//第一个 videos 节点 
$root = $root->item(0); 

//查找 videos 节点下的 video 节点 
$userid = $root->getElementsByTagName('video'); 

//遍历所有 video 节点 
foreach ($userid as $rootdata) 
{ 
//遍历每一个 video 节点所有属性 
foreach ($rootdata->attributes as $attrib) 
{ 
$attribName = $attrib->nodeName;   //nodeName为属性名称 
$attribValue = $attrib->nodeValue; //nodeValue为属性内容 

//查找属性名称为ip的节点内容 
if ($attribName =='img') 
{ 
//查找属性内容为ip的节点内容 
if ($attribValue =='1') 
{ 
//将属性为img，img内容为1的修改为image; 
$rootdata->setAttribute('img','image'); 
$doc->save('data.xml'); 
} 
} 
} 
}  
?>