php实现的RSS生成类实例_PHP教程

php实现的RSS生成类实例

2020-09-21 19:20不吃皮蛋 PHP教程

这篇文章主要介绍了php实现的RSS生成类,实例分析了RSS生成类的原理、定义与使用技巧,非常具有实用价值,需要的朋友可以参考下

本文实例讲述了php实现的RSS生成类。分享给大家供大家参考。具体如下：

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									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("&", "&amp;", $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;

									 }

									}

使用示例如下：

				?

									$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 = "<![CDATA[ $html ]]>";

									  $feed->addItem($item);

									}

									echo $feed->serve();