PHP can easily generate and read XML files. PHP mainly completes XML reading and writing operations through DOMDocument, DOMElement and DOMNodeList. Below is a brief explanation of how to use these classes.
1. Generate XML file
[html] PHP Access MySql Database Basics PHP Access MySql Database Basics
First create a new DOMDocument object and set the encoding format.
$dom = newDOMDocument('1.0', 'UTF-8');
$dom->formatOutput= true;
Create the node and the node</p>
<p>$rootelement =$dom->createElement("article");</p>
<p>$title =$dom->createElement("title", "PHP Access MySql Database - Elementary");</p>
<p> </p>
<p>Then create a <link> node with text content</p>
<p>$link =$dom->createElement("link","http://blog.csdn.net/morewindows/article/details/7102362");</p>
<p>You can also generate a <link> node first and then add text content to it. </p>
<p>$link = $dom->createElement("link");</p>
<p>$linktext =$dom->createTextNode('http://blog.csdn.net/morewindows/article/details/7102362');</p>
<p>$link->appendChild($linktext);</p>
<p> </p>
<p>Then add the <title> and <link> nodes to the <article> node </p>
<p>$rootelement->appendChild($title);</p>
<p>$rootelement->appendChild($link);</p>
<p> </p>
<p>Finally, add the <article> node to the DOMDocument object, </p>
<p>$dom->appendChild($rootelement);</p>
<p> </p>
<p>A complete XML is now generated. Then regenerate the entire XML, </p>
<p>echo $dom->saveXML() ;</p>
<p>saveXML() can also input only part of the XML text. For example, echo $dom->saveXML($link); will only output the <link> node: <link>http://blog.csdn. net/morewindows/article/details/7102362</link></p>
<p> </p>
<p>The following is a complete example of outputting data content to an XML file in PHP. This example will output a PHP array to an XML file. </p>
<p>[php] <?php <br />
//Output the array into an XML file <br />
// by MoreWindows( http://blog.csdn.net/MoreWindows ) <br />
$article_array = array( <br />
"First article" => array( <br>
"title"=>"Access MySql Database with PHP - Elementary", <br>
"link"=>"http://blog.csdn.net/morewindows/article/details/7102362" <br>
), <br>
"Part 2" => array( <br>
"title"=>"PHP Access MySql Database Intermediate Smarty Technology", <br>
"link"=>"http://blog.csdn.net/morewindows/article/details/7094642" <br>
), <br>
"Part 3" => array( <br>
"title"=>"PHP Access MySql Database Advanced AJAX Technology", <br>
"link"=>"http://blog.csdn.net/morewindows/article/details/7086524" <br>
), <br>
); <br>
$dom = new DOMDocument('1.0', 'UTF-8'); <br>
$dom->formatOutput = true; <br>
$rootelement = $dom->createElement("MoreWindows"); <br>
foreach ($article_array as $key=>$value) <br>
{ <br>
$article = $dom->createElement("article", $key); <br>
$title = $dom->createElement("title", $value['title']); <br>
$link = $dom->createElement("link", $value['link']); <br>
$article->appendChild($title); <br>
$article->appendChild($link); <br>
$rootelement->appendChild($article); <br>
} <br>
$dom->appendChild($rootelement); <br>
$filename = "D:\test.xml"; <br>
echo 'XML file size' . $dom->save($filename) . 'Bytes'; <br>
?> <br>
<?php<br />
//Output the array to an XML file <br />
// by MoreWindows( http://blog.csdn.net/MoreWindows )<br />
$article_array = array(<br />
"First article" => array(<br />
"title"=>"Access MySql database with PHP - Elementary",<br>
"link"=>"http://blog.csdn.net/morewindows/article/details/7102362"<br>
),<br>
"Part 2" => array(<br>
"title"=>"PHP Access MySql Database Intermediate Smarty Technology",<br>
"link"=>"http://blog.csdn.net/morewindows/article/details/7094642"<br>
),<br>
"Part 3" => array(<br>
"title"=>"PHP Access MySql Database Advanced AJAX Technology",<br>
"link"=>"http://blog.csdn.net/morewindows/article/details/7086524"<br>
),<br>
);<br>
$dom = new DOMDocument('1.0', 'UTF-8');<br>
$dom->formatOutput = true;<br>
$rootelement = $dom->createElement("MoreWindows");<br>
foreach ($article_array as $key=>$value)<br>
{<br>
$article = $dom->createElement("article", $key);<br>
$title = $dom->createElement("title", $value['title']);<br>
$link = $dom->createElement("link", $value['link']);<br>
$article->appendChild($title);<br>
$article->appendChild($link);<br>
$rootelement->appendChild($article);<br>
}<br>
$dom->appendChild($rootelement);<br>
$filename = "D:\test.xml";<br>
echo 'XML file size' . $dom->save($filename) . 'Bytes';<br>
?><br>
Running this PHP will generate the test.xml file on the D drive (Win7 + XAMPP + IE9.0 test passed) </p>
<p> </p>
<p>2. Read XML file <br>
Take reading the D:\test.xml generated in the previous article as an example: </p>
<p>[php] <?php <br />
//读取XML文件 <br />
// by MoreWindows( http://blog.csdn.net/MoreWindows ) <br />
$filename = "D:\test.xml"; <br />
$article_array = array(); <br />
<br />
$dom = new DOMDocument('1.0', 'UTF-8'); <br />
$dom->load($filename); <br>
<br>
//得到<article>结点 <br>
$articles = $dom->getElementsByTagName("article"); <br>
echo '<article> 结点个数 ' . $articles->length; <br>
foreach ($articles as $article) <br>
{ <br>
$id = $article->getElementsByTagName("id")->item(0)->nodeValue; <br>
$title = $article->getElementsByTagName("title")->item(0)->nodeValue; <br>
$link = $article->getElementsByTagName("link")->item(0)->nodeValue; <br>
$article_array[$id] = array('title'=>$title, 'link'=>$link); <br>
} <br>
<br>
//输出结果 <br>
echo "<pre class="brush:php;toolbar:false">"; <br>
var_dump($article_array); <br>
echo "</pre>"; <br>
?> <br>
<?php<br />
//读取XML文件<br />
// by MoreWindows( http://blog.csdn.net/MoreWindows )<br />
$filename = "D:\test.xml";<br />
$article_array = array();</p>
<p>$dom = new DOMDocument('1.0', 'UTF-8');<br />
$dom->load($filename);</p>
<p>//得到<article>结点<br>
$articles = $dom->getElementsByTagName("article");<br>
echo '<article> 结点个数 ' . $articles->length;<br>
foreach ($articles as $article)<br>
{<br>
$id = $article->getElementsByTagName("id")->item(0)->nodeValue;<br>
$title = $article->getElementsByTagName("title")->item(0)->nodeValue;<br>
$link = $article->getElementsByTagName("link")->item(0)->nodeValue;<br>
$article_array[$id] = array('title'=>$title, 'link'=>$link);<br>
}</p>
<p>//输出结果<br>
echo "<pre class="brush:php;toolbar:false">";<br>
var_dump($article_array);<br>
echo "</pre>";<br>
?><br>
运行结果如下：</p>
<p> <img src="/static/imghw/default1.png" data-src="http://www.bkjia.com/uploads/allimg/131122/144SK461-0.gif" class="lazy" alt=""><br>
<br>
摘自 MoreWindows</p>
<p align="left"></p>
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