PHP读写XML文件
PHP读写XML文件 author:MoreWindows blog: http://blog.csdn.net/MoreWindows KeyWord: PHP 解析XML DOMDocument XML文件操作 PHP可以方便的生成和读取XML文件。PHP主要通过DOMDocument、DOMElement和DOMNodeList来完成XML的读取与写入操作的。下面就简要说
PHP读写XML文件
author: MoreWindows
blog: http://blog.csdn.net/MoreWindows
KeyWord: PHP 解析XML DOMDocument XML文件操作
PHP可以方便的生成和读取XML文件。PHP主要通过DOMDocument、DOMElement和DOMNodeList来完成XML的读取与写入操作的。下面就简要说明下如何使用这些类。
一.生成XML文件
对于一个如下XML文件。
<?xml version="1.0" encoding="UTF-8"?> <article> <title>PHP访问MySql数据库 初级篇</title> <link>http://blog.csdn.net/morewindows/article/details/7102362 </article>
我们来看看如何用PHP来生成:
首先new一个DOMDocument对象并设置编码格式。
$dom = newDOMDocument('1.0', 'UTF-8');
$dom->formatOutput= true;
再创建
$rootelement =$dom->createElement("article");
$title =$dom->createElement("title", "PHP访问MySql数据库 初级篇");
然后创建带文本内容的结点
$link =$dom->createElement("link","http://blog.csdn.net/morewindows/article/details/7102362");
也可以先生成结点再为其添加文本内容。
$link = $dom->createElement("link");
$linktext =$dom->createTextNode('http://blog.csdn.net/morewindows/article/details/7102362');
$link->appendChild($linktext);
然后将
$rootelement->appendChild($title);
$rootelement->appendChild($link);
最后将
$dom->appendChild($rootelement);
这样一个完整的XML就生成完毕了。再整出整个XML,
echo $dom->saveXML() ;
saveXML()也可以只输入部分XML文本,如echo $dom->saveXML($link);就只会输出结点:http://blog.csdn.net/morewindows/article/details/7102362>
下面再给出一个完整的PHP中数据内容输出到XML文件的例子。该例子会对将一个PHP数组输出到XML文件中。
<?php //将数组输出到XML文件中 // by MoreWindows( http://blog.csdn.net/MoreWindows ) $article_array = array( "第一篇" => array( "title"=>"PHP访问MySql数据库 初级篇", "link"=>"http://blog.csdn.net/morewindows/article/details/7102362" ), "第二篇" => array( "title"=>"PHP访问MySql数据库 中级篇 Smarty技术", "link"=>"http://blog.csdn.net/morewindows/article/details/7094642" ), "第三篇" => array( "title"=>"PHP访问MySql数据库 高级篇 AJAX技术", "link"=>"http://blog.csdn.net/morewindows/article/details/7086524" ), ); $dom = new DOMDocument('1.0', 'UTF-8'); $dom->formatOutput = true; $rootelement = $dom->createElement("MoreWindows"); foreach ($article_array as $key=>$value) { $article = $dom->createElement("article", $key); $title = $dom->createElement("title", $value['title']); $link = $dom->createElement("link", $value['link']); $article->appendChild($title); $article->appendChild($link); $rootelement->appendChild($article); } $dom->appendChild($rootelement); $filename = "D:\\test.xml"; echo 'XML文件大小' . $dom->save($filename) . '字节'; ?>
运行该PHP会在D盘上生成test.xml文件(Win7 + XAMPP + IE9.0测试通过)
二.读取XML文件
以读取前文中生成的D:\\test.xml为例:
<?php //读取XML文件 // by MoreWindows( http://blog.csdn.net/MoreWindows ) $filename = "D:\\test.xml"; $article_array = array(); $dom = new DOMDocument('1.0', 'UTF-8'); $dom->load($filename); //得到<article>结点 $articles = $dom->getElementsByTagName("article"); echo '<article> 结点个数 ' . $articles->length; foreach ($articles as $article) { $id = $article->getElementsByTagName("id")->item(0)->nodeValue; $title = $article->getElementsByTagName("title")->item(0)->nodeValue; $link = $article->getElementsByTagName("link")->item(0)->nodeValue; $article_array[$id] = array('title'=>$title, 'link'=>$link); } //输出结果 echo "<pre class="brush:php;toolbar:false">"; var_dump($article_array); echo "
运行结果如下:
更详细的内容请访问PHP手册中的DOMDocument类。当然想要更加方便可以使用一些第三方提供的XML类库,这里就不一一列举了,有兴趣可以到网上找找。
http://blog.csdn.net/morewindows/article/details/7241452

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