PHP实现一个简单的RSS订阅

其实很简单，照着格式查询数据库，然后再输出拼接即可！

<?php

// +----------------------------------------------------------------------
// | JiZhiCMS { 极致CMS，给您极致的建站体验 } 
// +----------------------------------------------------------------------
// | Copyright (c) 2018-2099 http://www.jizhicms.com All rights reserved.
// +----------------------------------------------------------------------
// | Author: 留恋风 <2581047041@qq.com>
// +----------------------------------------------------------------------
// | Date：2020/04/11
// +----------------------------------------------------------------------


namespace Home\plugins;

use Home\c\CommonController;

class IndexController extends CommonController
{
	
	function rss(){
		
		$item = '';
		
		//栏目item
		foreach($this->classtypedata as $v){
			if($v['isshow']==1){
				$item .= '<item>
						<title><![CDATA[ '.$v['classname'].' ]]></title>
						<link>'.$v['url'].'</link>
						<description><![CDATA[ '.$v['description'].' ]]></description>

						<source>'.$this->webconf['web_name'].'</source>

						<pubDate>'.date("D, d M Y H:i:s ", time()) . "GMT".'</pubDate> 
					</item>';
			}
		}
		//文章item
		$article = M('article')->findAll(['isshow'=>1]);
		foreach($article as $v){
			$v['url'] = gourl($v,$v['htmlurl']);
			$item .= '<item>
						<title><![CDATA[ '.$v['title'].' ]]></title>
						<link>'.$v['url'].'</link>
						<description><![CDATA[ '.$v['description'].' ]]></description>

						<source>'.$this->webconf['web_name'].'</source>

						<pubDate>'.date("D, d M Y H:i:s ", time()) . "GMT".'</pubDate> 
					</item>';
		}
		//商品item
		$product = M('product')->findAll(['isshow'=>1]);
		foreach($product as $v){
			$v['url'] = gourl($v,$v['htmlurl']);
			$item .= '<item>
						<title><![CDATA[ '.$v['title'].' ]]></title>
						<link>'.$v['url'].'</link>
						<description><![CDATA[ '.$v['description'].' ]]></description>

						<source>'.$this->webconf['web_name'].'</source>

						<pubDate>'.date("D, d M Y H:i:s ", time()) . "GMT".'</pubDate> 
					</item>';
		}
		
		$xml = '<?xml version="1.0" encoding="utf-8"?>  
				<rss version="2.0">
				<channel>
					<title>'.$this->webconf['web_name'].'</title>
					<description>'.$this->webconf['web_desc'].'</description>
					<link>'.get_domain().'</link>
					<generator>Rss Powered By jizhicms</generator>
					<image>
						<url>'.get_domain().'/'.$this->webconf['web_logo'].'</url>
						<title>'.$this->webconf['web_name'].'</title>
						<link>'.get_domain().'</link>
					</image>
					
					'.$item.'

				</channel>

				</rss>';
		header("Content-type:application/xml");
		echo $xml;

    }
}