http://blog.csdn.net/morewindows/article/details/7102362
PHP读写XML文件技巧
常用 如下 几行:
header("content-type:text/html; charset=utf-8"); //指定PHP使用UTF-8编码
$xml = simplexml_load_file("example.xml"); //读取xml文件
$newxml = $xml->asXML(); //标准化$xml
$fp = fopen("newxml.xml", "w"); //新建xml文件
fwrite($fp, $newxml); //写入-------xml文件
fclose($fp);
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。
[html]
http://blog.csdn.net/morewindows/article/details/7102362
http://blog.csdn.net/morewindows/article/details/7102362
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';
?>
//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
$articles = $dom->getElementsByTagName("article");
echo '
foreach ($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 ""; <br>
var_dump($article_array); <br>
echo "
";
?>
//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
$articles = $dom->getElementsByTagName("article");
echo '
foreach ($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 "
";<br> var_dump($article_array);<br> echo "";
?>

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