RSS是一种网页内容联合格式，是XML的一种，所有的RSS文档都遵循XML1.0规范。

具体示例：

<span style="font-family:Microsoft YaHei;font-size:18px;"><?xml version = "1.0" encoding = "utf-8" ?>
<RSS version = "2.0" xmlns:wfw ="http://wellformedweb.org/CommentAPI/">
       <channel>
              <title>标题</title>
              <link>链接地址</link>
              <description>描述</description>
              <language>描述语言</language>
              <copyright>版本</copyright>
              <pubdate>时间</pubdate>
              <item>
                     <title>日志标题</title>
                  <link>日志的url访问地址</link>
                     <author>日志的作者</author>
                     <pubdate>日志的发布时间</pubdate>
                     <description>日志的内容</description>
              </item>
       </channel>
</RSS></span>

此时应该链接数据库，输出想要的结果。

Test.PHP

<span style="font-family:Microsoft YaHei;font-size:18px;"><?PHP
       include("./conn.PHP");
       class test{
              public $title = '';
              public $link = '';
              public $description= '';
              public $items = '';
              public $template ='./test.xml';
              public $dom = '';
              public $RSS = '';
              public function__construct(){
                     $this ->dom = new domDocument('1.0','utf-8');
                     $this ->dom -> load($this -> template);
                     $this ->RSS = $this -> dom -> GetElementsByTagName('RSS');
              }
              public functioncreateChannel(){
                     $channel =$this -> dom -> createElement("channel");
                     $channel-> appendChild($this -> createEle('title',$this -> title));
                     $channel-> appendChild($this -> createEle('link',$this -> link));
                     $channel-> appendChild($this -> createEle('description',$this ->description));
                     $this ->RSS -> appendChild($channel);
                      
              }
              public functioncreateEle($name,$value){
                     $element =$this -> dom -> createElement($name);
                     $text = $this-> dom -> createTextNode($value);
                     $element-> appendChild($text);
                     return$element;
              }
              protected functionadditem($list){
                     foreach($listas $goods){
                            $this-> RSS -> appendChild($this-> createitem($goods));
                     }
              }
              public functioncreateitem($arr){
                     $item = $this-> dom -> createElement("item");
                     foreach($arras $key => $value){
                            $item-> appendChild($this -> createEle($key,$value));
                     }
                     return $item;
              }
               
              public functiondisplay(){
                     $this ->createChannel();
                     $this ->additem($this -> items);
                     echo $this-> dom -> savexml();
              }
       }
       $sql = "select * fromstu";
       $rs = MysqL_query($sql);
       while($row =MysqL_fetch_assoc($rs)){
              $list[] = $row;
       }
       $test = new test();
       $test -> title = "测试标题";
       $test -> link = "测试连接";
       $test -> description ="测试内容";
       $test -> display();
       $test -> items = $list;
</span>