xml实现rss订阅

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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>

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