 
<? 
/************************************************ 
** use XML in PHP5 
** reference site: 
** http://cn.php.net/manual/zh/ref.dom.php 
** the follow codes need PHP5 support 
*************************************************/ 

//首先要創(chuàng)建一個DOMDocument對象 
$dom = new DomDocument(); 
//然后載入XML文件 
$dom -> load("test.xml"); 

//輸出XML文件 
//header("Content-type: text/xml;charset=gb2312"); 
//echo $dom -> saveXML(); 

//保存XML文件，返回值為int（文件大小，以字節(jié)為單位） 
//$dom -> save("newfile.xml"); 

echo "<hr/>取得所有的title元素:<hr/>"; 
$titles = $dom -> getElementsByTagName("title"); 
foreach ($titles as $node){ 
echo $node -> textContent . "<br/>"; 
//這樣也可以 
//echo $node->firstChild->data . "<br/>"; 
} 

/* 
echo "<hr/>從根結(jié)點遍歷所有結(jié)點：<br/>"; 
foreach ($dom->documentElement->childNodes as $items) { 
//如果節(jié)點是一個元素(nodeType == 1)并且名字是item就繼續(xù)循環(huán) 
if ($items->nodeType == 1 && $items->nodeName == "item") { 
foreach ($items->childNodes as $titles) { 
//如果節(jié)點是一個元素，并且名字是title就打印它. 
if ($titles->nodeType == 1 && $titles->nodeName == "title") { 
print $titles->textContent . "\n"; 
} 
} 
} 
} 
*/ 

//使用XPath查詢數(shù)據(jù) 
echo "<hr/>使用XPath查詢的title節(jié)點結(jié)果:<hr/>"; 
$xpath = new domxpath($dom); 
$titles = $xpath->query("/rss/channel/item/title"); 
foreach ($titles as $node){ 
echo $node->textContent."<br/>"; 
} 
/* 
這樣和使用getElementsByTagName()方法差不多，但是Xpath要強大的多 
深入一點可能是這樣： 
/rss/channel/item[position() = 1]/title 返回第一個item元素的所有 
/rss/channel/item/title[@id = '23'] 返回所有含有id屬性并且值為23的title 
/rss/channel/&folder&/title 返回所有articles元素下面的title(譯者注：&folder&代表目錄深度) 
*/ 


//向DOM中寫入新數(shù)據(jù) 
$item = $dom->createElement("item"); 
$title = $dom->createElement("title"); 
$titleText = $dom->createTextNode("title text"); 
$title->appendChild($titleText); 
$item->appendChild($title); 
$dom->documentElement->getElementsByTagName('channel')->item(0)->appendChild($item); 

//從DOM中刪除節(jié)點 
//$dom->documentElement->RemoveChild($dom->documentElement->getElementsByTagName("channel")->item(0)); 
//或者使用xpath查詢出節(jié)點再刪除 
//$dom->documentElement->RemoveChild($xpath->query("/rss/channel")->item(0)); 
//$dom->save("newfile.xml"); 

//從DOM中修改節(jié)點數(shù)據(jù) 
//修改第一個title的文件 
//這個地方比較笨，新創(chuàng)建一個節(jié)點，然后替換舊的節(jié)點。如果哪位朋友有其他好的方法請一定要告訴我 
$firstTitle = $xpath->query("/rss/channel/item/title")->item(0); 
$newTitle = $dom->createElement("title"); 
$newTitle->appendChild(new DOMText("This's the new title text!!!")); 
$firstTitle->parentNode->replaceChild($newTitle, $firstTitle); 
//修改屬性 
//$firstTitle = $xpath->query("/rss/channel/item/title")->item(0); 
//$firstTitle->setAttribute("orderby", "4"); 
$dom->save("newfile.xml"); 

echo "<hr/><a href=\"newfile.xml\">查看newfile.xml</a>"; 

//下面的代碼獲得并解析php.net的首頁，將返第一個title元素的內(nèi)容。 
/* 
$dom->loadHTMLFile("http://www.php.net/"); 
$title = $dom->getElementsByTagName("title"); 
print $title->item(0)->textContent; 
*/ 
?> 

下面是test.xml文件代碼：

復(fù)制代碼代碼如下:

 
<?xml version="1.0" encoding="gb2312"?> 
<rss version="2.0"> 
<channel> 
<title>javascript</title> 
<link>http://blog.csdn.net/zhongmao/category/29515.aspx</link> 
<description>javascript</description> 
<language>zh-chs</language> 
<generator>.text version 0.958.2004.2001</generator> 
<item> 
<creator>zhongmao</creator> 
<title orderby="1">out put excel used javascript</title> 
<link>http://blog.csdn.net/zhongmao/archive/2004/09/15/105385.aspx</link> 
<pubdate>wed, 15 sep 2004 13:32:00 gmt</pubdate> 
<guid>http://blog.csdn.net/zhongmao/archive/2004/09/15/105385.aspx</guid> 
<comment>http://blog.csdn.net/zhongmao/comments/105385.aspx</comment> 
<comments>http://blog.csdn.net/zhongmao/archive/2004/09/15/105385.aspx#feedback</comments> 
<comments>2</comments> 
<commentrss>http://blog.csdn.net/zhongmao/comments/commentrss/105385.aspx</commentrss> 
<ping>http://blog.csdn.net/zhongmao/services/trackbacks/105385.aspx</ping> 
<description>test description</description> 
</item> 
<item> 
<creator>zhongmao</creator> 
<title orderby="2">out put word used javascript</title> 
<link>http://blog.csdn.net/zhongmao/archive/2004/08/06/67161.aspx</link> 
<pubdate>fri, 06 aug 2004 16:33:00 gmt</pubdate> 
<guid>http://blog.csdn.net/zhongmao/archive/2004/08/06/67161.aspx</guid> 
<comment>http://blog.csdn.net/zhongmao/comments/67161.aspx</comment> 
<comments>http://blog.csdn.net/zhongmao/archive/2004/08/06/67161.aspx#feedback</comments> 
<comments>0</comments> 
<commentrss>http://blog.csdn.net/zhongmao/comments/commentrss/67161.aspx</commentrss> 
<ping>http://blog.csdn.net/zhongmao/services/trackbacks/67161.aspx</ping> 
<description>test word description</description> 
</item> 
<item> 
<creator>zhongmao</creator> 
<title orderby="3">xmlhttp</title> 
<link>http://blog.csdn.net/zhongmao/archive/2004/08/02/58417.aspx</link> 
<pubdate>mon, 02 aug 2004 10:11:00 gmt</pubdate> 
<guid>http://blog.csdn.net/zhongmao/archive/2004/08/02/58417.aspx</guid> 
<comment>http://blog.csdn.net/zhongmao/comments/58417.aspx</comment> 
<comments>http://blog.csdn.net/zhongmao/archive/2004/08/02/58417.aspx#feedback</comments> 
<comments>0</comments> 
<commentrss>http://blog.csdn.net/zhongmao/comments/commentrss/58417.aspx</commentrss> 
<ping>http://blog.csdn.net/zhongmao/services/trackbacks/58417.aspx</ping> 
<description>xmlhttpaaa asd bb cc dd</description> 
</item> 
</channel> 
</rss> 