php实现的RSS生成类实例

发布:smiling　来源: PHP粉丝网　添加日期：2021-05-22 21:51:36　浏览: 评论：0　

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：

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(emptyempty($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(emptyempty($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(emptyempty($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();