php实现的RSS生成类实例

 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 .= "\n"; $out .= "\n"; $out .= "" . $this->link . "\n"; $out .= "" . $this->description . "\n"; $out .= "" . $this->language . "\n"; $out .= "" . $this->getPubDate() . "\n"; foreach($this->tags as $key => $val) $out .= "<$key>$val\n"; foreach($this->items as $item) $out .= $item->out(); $out .= "\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 = '' . "\n"; $out .= '' . "\n"; return $out; } function footer() { return ''; } } 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 .= "\n"; $out .= "\n"; $out .= "" . $this->link . "\n"; $out .= "" . $this->description . "\n"; $out .= "" . $this->getPubDate() . "\n"; if($this->attachment != "") $out .= ""; if(empty($this->guid)) $this->guid = $this->link; $out .= "" . $this->guid . "\n"; foreach($this->tags as $key => $val) $out .= "<$key>$val"; $out .= "\n"; return $out; } function enclosure($url, $mimetype, $length) { $this->attachment = $url; $this->mimetype  = $mimetype; $this->length   = $length; } }

 $feed = new RSS(); $feed->title    = "RSS Feed Title"; $feed->link    = "http://website.com"; $feed->description = "Recent articles on your website."; $db->query($query); $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 = ""; $feed->addItem($item); } echo $feed->serve();