发布于 2015-11-15 12:55:17 | 92 次阅读 | 评论: 0 | 来源: 网友投递
PHP开源脚本语言
PHP（外文名: Hypertext Preprocessor，中文名：“超文本预处理器”）是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点，入门门槛较低，易于学习，使用广泛，主要适用于Web开发领域。PHP的文件后缀名为php。
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();