本文实例讲述了php制作基于xml的RSS订阅源功能。分享给大家供大家参考，具体如下：
首先制作一个 RSS 模板，模板的文件名是 feed.xml，代码如下：
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<?xml version="1.0" encoding="utf-8"?><rss version="2.0" xmlns:wfw="http://wellformedweb.org/CommentAPI/"></rss> |
再就是用php文件从数据库读取数据并生成 RSS 文件，这里用一个数组模拟从数据库读取的数据：
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<?php class Rss{ protected $dom = null; protected $temp = './feed.xml'; protected $rss = null; protected $title = ''; protected $desc = ''; protected $link = ''; public function __construct(){ $this->title = '物理学'; $this->desc = '现代物理学'; $this->link = 'http://mysql/rss.php'; $this->dom = new DOMDocument('1.0','utf-8'); $this->dom->load($this->temp); $this->rss = $this->dom->getElementsByTagName('rss')->item(0); } public function feed($arr){ $this->createChannel(); $channel = $this->dom->getElementsByTagName('channel')->item(0); foreach ($arr as $v){ $channel->appendChild($this->createItem($v)); } header('content-type:text/xml'); echo $this->dom->savexml(); } protected function createChannel(){ $channel = $this->dom->createElement('channel'); $channel->appendChild($this->createEle('title',$this->title)); $channel->appendChild($this->createEle('link',$this->link)); $channel->appendChild($this->createEle('description',$this->desc)); $this->rss->appendChild($channel); } protected function createItem($arr){ $item = $this->dom->createElement('item'); foreach($arr as $k => $v){ $item->appendChild($this->createEle($k,$v)); } return $item; } protected function createEle($name,$value){ $e=$this->dom->createElement($name); $t=$this->dom->createTextNode($value); $e->appendChild($t); return $e; }}$arr = array( array( 'title'=>'牛顿力学', 'link'=>'1', 'description'=>'牛顿力学' ), array( 'title'=>'相对论', 'link'=>'1', 'description'=>'爱因斯坦的相对论' ));$rss = new Rss;$rss->feed($arr);?> |
最后在火狐下效果：
希望本文所述对大家PHP程序设计有所帮助。
