First we create two php files
head.php code is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<script>
function showRSS(str){
if (str.length==0){
document.getElementById("rssOutput").innerHTML="";
return;
}
if (window.XMLHttpRequest){
// IE7+, Firefox, Chrome, Opera, Safari 浏览器执行代码
xmlhttp=new XMLHttpRequest();
}else{
// IE6, IE5 浏览器执行代码
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200){
document.getElementById("rssOutput").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","demo.php?q="+str,true);
xmlhttp.send();
}
</script>
</head>
<body>
<form>
<select onchange="showRSS(this.value)">
<option value="">选择一个 RSS-feed:</option>
<option value="rss">读取 RSS 数据</option>
</select>
</form>
<br>
<div id="rssOutput">RSS-feed 数据列表...</div>
</body>
</html> Next we create another php file, the code is as follows:
<?php
// rss 文件
$xml="demo.xml";
$xmlDoc = new DOMDocument();
$xmlDoc->load($xml);
// 从 "<channel>" 中读取元素
$channel=$xmlDoc->getElementsByTagName('channel')->item(0);
$channel_title = $channel->getElementsByTagName('title')
->item(0)->childNodes->item(0)->nodeValue;
$channel_link = $channel->getElementsByTagName('link')
->item(0)->childNodes->item(0)->nodeValue;
$channel_desc = $channel->getElementsByTagName('description')
->item(0)->childNodes->item(0)->nodeValue;
// 输出 "<channel>" 中的元素
echo("<p><a href='" . $channel_link
. "'>" . $channel_title . "</a>");
echo("<br>");
echo($channel_desc . "</p>");
// 输出 "<item>" 中的元素
$x=$xmlDoc->getElementsByTagName('item');
for ($i=0; $i<=1; $i++) {
$item_title=$x->item($i)->getElementsByTagName('title')
->item(0)->childNodes->item(0)->nodeValue;
$item_link=$x->item($i)->getElementsByTagName('link')
->item(0)->childNodes->item(0)->nodeValue;
$item_desc=$x->item($i)->getElementsByTagName('description')
->item(0)->childNodes->item(0)->nodeValue;
echo ("<p><a href='" . $item_link
. "'>" . $item_title . "</a>");
echo ("<br>");
echo ($item_desc . "</p>");
}
?>Continue Next we are going to create a demo.xml file, the code is as follows:
<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0">
<channel>
<title>php教程</title>
<link>http://www.php.cn</link>
<description>学的不仅技术，更新梦想！！</description>
<item>
<title>RSS 教程</title>
<link>http://www.php.cn/rss/rss-tutorial.html</link>
<description>通过使用 RSS，您可以有选择地浏览您感兴趣的以及与您的工作相关的新闻�?/description>
</item>
<item>
<title>XML 教程</title>
<link>http://www.php.cn/xml/xml-tutorial.html</link>
<description>XML 指可扩展标记语言（eXtensible Markup Language）</description>
</item>
</channel>
</rss>
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