PHP RSS 生成类

   $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 (!empty($this->copyright)) {
          $s .= "{$this->copyright} ";
       }
       if (!empty($this->webmaster)) {
          $s .= "{$this->webmaster} ";
       }
       if (!empty($this->pubdate)) {
          $s .= "{$this->pubdate} ";
       }

       if (!empty($this->lastbuilddate)) {
          $s .= "{$this->lastbuilddate} ";
       }

       if (!empty($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 (empty($this->content)) $this->buildrss();
       header('content-type:text/xml');
       echo($this->content);
   }

   function savetofile($fname) {
       if (empty($this->content)) $this->buildrss();
       $handle = fopen($fname, 'wb');
       if ($handle === false)  return false;
       fwrite($handle, $this->content);
       fclose($handle);
   }
}