php 生成 RSS 类（php生成html）

以下包含了两个类： RSS 和 RSSItem。

创建一个新的 RSS 对象，然后用 RSSItems 填充它。支持多媒体（音频/视频文件）。

/* 实例 -----------------------------------------------
 $feed = new RSS();
 $feed->title = "RSS Feed 标题";
 $feed->link = "http://runoob.com";
 $feed->description = "RSS 订阅列表描述。";
 $db->query($query); // 数据库查询
 $result = $db->result;
 while($row = mysql_fetch_array($result, MYSQL_ASSOC))
 {
 $item = new RSSItem();
 $item->title = $title;
 $item->link = $link;
 $item->setPubDate($create_date); 
 $item->description = "<![CDATA[ $html ]]>";
 $feed->addItem($item);
 }
 echo $feed->serve();
---------------------------------------------------------------- */
class RSS
{
 var $title;
 var $link;
 var $description;
 var $language = "en-us";
 var $pubDate;
 var $items;
 var $tags;
 function RSS()
 {
 $this->items = array();
 $this->tags = array();
 }
 function addItem($item)
 {
 $this->items[] = $item;
 }
 function setPubDate($when)
 {
 if(strtotime($when) == false)
 $this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
 else
 $this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
 }
 function getPubDate()
 {
 if(empty($this->pubDate))
 return date("D, d M Y H:i:s ") . "GMT";
 else
 return $this->pubDate;
 }
 function addTag($tag, $value)
 {
 $this->tags[$tag] = $value;
 }
 function out()
 {
 $out = $this->header();
 $out .= "<channel>\n";
 $out .= "<title>" . $this->title . "</title>\n";
 $out .= "<link>" . $this->link . "</link>\n";
 $out .= "<description>" . $this->description . "</description>\n";
 $out .= "<language>" . $this->language . "</language>\n";
 $out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
 foreach($this->tags as $key => $val) $out .= "<$key>$val</$key>\n";
 foreach($this->items as $item) $out .= $item->out();
 $out .= "</channel>\n";
 $out .= $this->footer();
 $out = str_replace("&", "&", $out);
 return $out;
 }
 function serve($contentType = "application/xml")
 {
 $xml = $this->out();
 header("Content-type: $contentType");
 echo $xml;
 }
 function header()
 {
 $out = '<?xml version="1.0" encoding="utf-8"?>' . "\n";
 $out .= '<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">' . "\n";
 return $out;
 }
 function footer()
 {
 return '</rss>';
 }
}
class RSSItem
{
 var $title;
 var $link;
 var $description;
 var $pubDate;
 var $guid;
 var $tags;
 var $attachment;
 var $length;
 var $mimetype;
 function RSSItem()
 { 
 $this->tags = array();
 }
 function setPubDate($when)
 {
 if(strtotime($when) == false)
 $this->pubDate = date("D, d M Y H:i:s ", $when) . "GMT";
 else
 $this->pubDate = date("D, d M Y H:i:s ", strtotime($when)) . "GMT";
 }
 function getPubDate()
 {
 if(empty($this->pubDate))
 return date("D, d M Y H:i:s ") . "GMT";
 else
 return $this->pubDate;
 }
 function addTag($tag, $value)
 {
 $this->tags[$tag] = $value;
 }
 function out()
 {
 $out .= "<item>\n";
 $out .= "<title>" . $this->title . "</title>\n";
 $out .= "<link>" . $this->link . "</link>\n";
 $out .= "<description>" . $this->description . "</description>\n";
 $out .= "<pubDate>" . $this->getPubDate() . "</pubDate>\n";
 if($this->attachment != "")
 $out .= "<enclosure url='{$this->attachment}' length='{$this->length}' type='{$this->mimetype}' />";
 if(empty($this->guid)) $this->guid = $this->link;
 $out .= "<guid>" . $this->guid . "</guid>\n";
 foreach($this->tags as $key => $val) $out .= "<$key>$val</$key\n>";
 $out .= "</item>\n";
 return $out;
 }
 function enclosure($url, $mimetype, $length)
 {
 $this->attachment = $url;
 $this->mimetype = $mimetype;
 $this->length = $length;
 }
}