php生成RSS文件类实例代码

<?php 
if (defined('_class_rss_php')) return; 
define('_class_rss_php教程',1); 

class rss { 
 //public 
 $rss_ver = "2.0"; 
 $channel_title = ''; 
 $channel_link = ''; 
 $channel_description = ''; 
 $language = 'zh_cn'; 
 $copyright = ''; 
 $webmaster = ''; 
 $pubdate = ''; 
 $lastbuilddate = ''; 
 $generator = 'redfox rss generator'; 
 
 $content = ''; 
 $items = array(); 
 
 function rss($title, $link, $description) { 
 $this->channel_title = $title; 
 $this->channel_link = $link; 
 $this->channel_description = $description; 
 $this->pubdate = date('y-m-d h:i:s',time()); 
 $this->lastbuilddate = date('y-m-d h:i:s',time()); 
 } 
 
 function additem($title, $link, $description ,$pubdate) { 
 $this->items[] = array('titile' => $title , 
 'link' => $link, 
 'description' => $description, 
 'pubdate' => $pubdate); 
 } 
 
 function buildrss() { 
 $s = "<!--l version="1.0" encoding="gb2312"--> "; 
 // start channel 
 $s .= " "; 
 $s .= " " 
 $s .= "<link />{$this->channel_link} "; 
 $s .= "{$this->channel_description} "; 
 $s .= "{$this->language} "; 
 if (!emptyempty($this->copyright)) { 
 $s .= "{$this->copyright} "; 
 } 
 if (!emptyempty($this->webmaster)) { 
 $s .= "{$this->webmaster} "; 
 } 
 if (!emptyempty($this->pubdate)) { 
 $s .= "{$this->pubdate} "; 
 } 
 
 if (!emptyempty($this->lastbuilddate)) { 
 $s .= "{$this->lastbuilddate} "; 
 } 
 
 if (!emptyempty($this->generator)) { 
 $s .= "{$this->generator} "; 
 } 
 
 // start items 
 for ($i=0;$iitems),$i++) { 
 $s .= " "; 
 $s .= " "; 
 $s .= "<link />{$this->items[$i]['link']} "; 
 $s .= "<!--data[{$thi-->items[$i]['description']}]]> "; 
 $s .= "{$this->items[$i]['pubdate']} "; 
 $s .= " "; 
 } 
 
 // close channel 
 $s .= " "; 
 $this->content = $s; 
 } 
 
 function show() { 
 if (emptyempty($this->content)) $this->buildrss(); 
 header('content-type:text/xml'); 
 echo($this->content); 
 } 
 
 function savetofile($fname) { 
 if (emptyempty($this->content)) $this->buildrss(); 
 $handle = fopen($fname, 'wb'); 
 if ($handle === false) return false; 
 fwrite($handle, $this->content); 
 fclose($handle); 
 } 
} 
?>