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(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>$val</$keyn>";

$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();

希望本文所述对大家的php程序设计有所帮助。