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 = ""; $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="">' . "\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; }}