一个生成RSS2.0的php类

rss

/*****************************************
* RSS2.0 Generator
* Create by MagicBoy(darasion)
* Copyright ? 神奇男孩
******************************************/

/*————————————————

使用方法：
将下面的数组，带入相应的函数。

1、频道主体
$channel = array(
title => '频道名称(必备)',
link => '频道的URL(必备)',
description => '频道的描述(必备)',
language => '频道文章所用语言(可选)',
webmaster => '负责频道技术事务的网站管理员email(可选)',
managingEditor => '责任编辑的email(可选)',
pubDate => '频道内容发布日期，格式遵循RFC822格式（年份可为2位或4位）(可选)',
lastBuildDate => '频道内容最后的修改日期(Sat, 07 Sep 2002 09:42:31 GMT)(可选)',
skipDays => '提示新闻聚合器，那些天它可以跳过。(可选)',
copyright => '频道内容的版权说明(可选)',
ttl => '有效期，用以指明该频道可被缓存的最长时间(可选)',
);

2、频道图片
$image = array(
url => '图片的链接(必备)',
title => '图片的标题，用于http的alt属性(必备)',
link => '网站的url(实际中常以频道的url代替)(必备)',
width => '图片的宽度(象素为单位)最大144,默认88(可选)',
height => '图片的高度(象素为单位)最大400，默认31(可选)',
description => '用于link的title属性(可选)'
);

3、频道项
$item = array(
title => '项(item)的标题(必备)',
description => '项的大纲(必备)',
link => '项的URL(必备)',
comments => '该项的评论(comments)页的URL(可选)',
guid => '1项的唯一标志符串(可选)',
author => '该项作者的email(可选)',
enclosure => '描述该附带的媒体对象(可选)',
category => '包含该项的一个或几个分类(catogory)(可选)',
pubdate => '项的发布时间(可选)',
source_url => '该项来自的RSS道(可选)',
source_name => '该项来自的RSS道(可选)'
);
————————————————*/

class rss2
{
var $channel_pre="";
var $str_image="";
var $str_item="";
var $channel_end="";
/*构造函数*/
function rss2($channel,$encoding="GB2312")
{
$this->channel($channel,$encoding);
}
/*生成频道主体*/
function channel($channel,$encoding="GB2312")
{
$this->channel_pre.="\n";
$this->channel_pre.= "\n";

$this->channel_pre.= " \n";

$this->channel_pre.= " \n";//频道名称(必备)
$this->channel_pre.= " ".$channel['link']."\n";//频道的URL(必备)
$this->channel_pre.= " ".$channel['description']."\n";//频道的描述(必备)
$this->channel_pre.= " MagicBoy RSS Generator v1.0\n";//创建此文档的程序(可选)

if(isset($channel['language']))$this->channel_pre.= " ".$channel['language']."\n";//频道文章所用语言(可选)
if(isset($channel['webmaster']))$this->channel_pre.= " ".$channel['webmaster']."\n";//负责频道技术事务的网站管理员email(可选)
if(isset($channel['managingeditor']))$this->channel_pre.= " ".$channel['managingeditor']."\n";//责任编辑的email(可选)
if(isset($channel['pubdate']))$this->channel_pre.= " ".$channel['pubdate']."\n";//频道内容发布日期，格式遵循RFC822格式（年份可为2位或4位）(可选)
if(isset($channel['lastbuilddate']))$this->channel_pre.= " ".$channel['lastbuilddate']."\n";//频道内容最后的修改日期(Sat, 07 Sep 2002 09:42:31 GMT)(可选)
if(isset($channel['skipdays']))$this->channel_pre.= " ".$channel['skipdays']."\n";//提示新闻聚合器，那些天它可以跳过。(可选)
if(isset($channel['copyright']))$this->channel_pre.= " ".$channel['copyright']."\n";//频道内容的版权说明(可选)
if(isset($channel['ttl']))$this->channel_pre.= " ".$channel['ttl']."\n";//有效期，用以指明该频道可被缓存的最长时间(可选)

$this->channel_end.= " \n";
$this->channel_end.= "\n";
}
/*生成频道图片*/
function image($image)
{
if(isset($this->str_image))unset($this->str_image);
$this->str_image.= " \n";
if(isset($image['url']))$this->str_image.= " ".$image['url']."\n";//图片的url(必备)
if(isset($image['title']))$this->str_image.= " \n";//图片的标题，用于http的alt属性(必备)
if(isset($image['link']))$this->str_image.= " ".$image['link']."\n";//网站的url(实际中常以频道的url代替)(必备)
if(isset($image['width']))$this->str_image.= " ".$image['width']."\n";//图片的宽度(象素为单位)最大144,默认88(可选)
if(isset($image['height']))$this->str_image.= " ".$image['height']."\n";//图片的高度(象素为单位)最大400，默认31(可选)
if(isset($image['description']))$this->str_image.= " ".$image['description']."\n";//用于link的title属性(可选)
$this->str_image.= " \n";
}
/*频道项*/
function item($item)
{
$this->str_item.=" \n";
$this->str_item.=" \n";//项(item)的标题(必备)
$this->str_item.=" ".$item['description']."\n";//项的大纲(必备)
$this->str_item.=" ".$item['link']."\n";//项的URL(必备)

if(isset($item['comments']))$this->str_item.=" ".$item['comments']."\n";//该项的评论(comments)页的URL(可选)
if(isset($item['guid']))$this->str_item.=" ".$item['guid']."\n";//1项的唯一标志符串(可选)
if(isset($item['author']))$this->str_item.=" ".$item['author']."\n";//该项作者的email(可选)
if(isset($item['enclosure']))$this->str_item.=" ".$item['enclosure']."\n";//描述该附带的媒体对象(可选)
if(isset($item['category']))$this->str_item.=" ".$item['category']."\n";//包含该项的一个或几个分类(catogory)(可选)
if(isset($item['pubdate']))$this->str_item.=" ".$item['pubdate']."\n";//项的发布时间(可选)
if(isset($item['source_url']))$this->str_item.=" ".$item['source_name']."\n";//该项来自的RSS道(可选)
$this->str_item.=" \n";
}
/*输出xml*/
function generate()
{
if(isset($this->channel_pre)&&isset($this->channel_end)&&isset($this->str_item))
{
Header("Content-type:text/xml");
echo $this->channel_pre;
echo $this->str_image;
echo $this->str_item;
echo $this->channel_end;
}
}
/*擦除频道*/
function erase_channel()
{
unset($this->channel_pre);
unset($this->channel_end);
}
/*擦除频道图片*/
function erase_image()
{
unset($this->str_image);
}
/*擦除项目*/
function erase_item()
{
unset($this->str_item);
}
/*擦除所有*/
function erase()
{
$this->erase_channel();
$this->erase_image();
$this->erase_item();
}
}
?>