喜悦国际村 - PHP高级编程 - 关于RSS的用法,有谁知道.(页 1)

页: [1]

wgllz

2008-6-24 01:11 AM

关于RSS的用法,有谁知道.

我想做一个网站,就是读取RSS的内容,就像[url]www.xianguo.com[/url] 和 [url]www.zhuaxia.com[/url] 一样的功能,现在没有什么思路,大家给点思路和想法!

奶瓶	2008-6-24 03:54 AM

你什么地方没有思路？
哪个环节没有想法？

wgllz

2008-6-24 04:11 AM

回复 #2 奶瓶的帖子

就是如何用PHP读rss,如何实现实时更新的.就是关于RSS的一些知识.

奶瓶	2008-6-24 04:25 AM

RSS你可以选择解析成数组，也可以直接用css、xlst什么的把它格式化了
解析RSS的东西很多，phpclasses上搜能搜到，直接用php的xmlparaser解析一下也可以凑合用
RSS有三种常用标准，RSS0.91/RSS1.0/RSS2.0，其中2.0是0.9x上发展来的，和1.0其实无继承关系，是两伙人搞的，所以结构有点区别

这是简单的拆解过程：
[PHP]
<?php

/**
BSMLITE PROJECT

* Category : library
* Filename : feed_parser.lib.php
* Author : Dr.NP <[email]bssoft@263.net[/email]>
* Copyright (c) : 2006-2008 BS.Group, all rights reserved
* Version : 1.0.1

LICENSE

* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <[url]http://www.gnu.org/licenses/[/url]>.

DESCRIPTION

* Feed parser - RSS 0.9 / RSS 1.0 / RSS 2.0 / ATOM feeds

CHANGELOG

* 05/08/2008 (1.0.0) - Library creation
* 05/15/2008 (1.0.1) - ATOM supported

PACKAGE
* @package bsm

*/

class BsmFeedParser
{
var $classname = 'BsmFeedParser';

// Feed content
var $version;
var $content = '';

// Feed content
var $title;
var $ttl;
var $date;
var $image;

// Return value
var $feed = array();

// Tag
var $depth = array();

// Objects
var $xml_parser;

// status
var $in_item = false;
var $in_image = false;
var $in_entry = false;
var $current_element = '';
var $current_item = 0;

// Constructor
function __construct($content = null)
{
if ($content)
{
$this->content = $content;
}
}

// Set feed content
// You can use BSM's net library to fetch content by passing URLs
public function set_content($content)
{
if ($content)
{
$this->content = $content;
}
}

// Rarse it
public function parse()
{
$this->xml_parser = xml_parser_create();

xml_set_object($this->xml_parser, $this);
xml_set_element_handler($this->xml_parser, '_tag_open', '_tag_close');
xml_set_character_data_handler($this->xml_parser, '_tag_data');

xml_parse($this->xml_parser, $this->content);

return $this->_rebuild_feed();
}

// Handler: Tag open
private function _tag_open($parser, $tag_name, $tag_attrib)
{
$this->current_element = strtoupper($tag_name);
if ('ITEM' == strtoupper($tag_name))
{
$this->in_item = true;
$this->version = 'RSS';
$this->feed['VERSION'] = 'RSS';
}

if ('IMAGE' == strtoupper($tag_name))
{
$this->in_image = true;
}

if ('ENTRY' == strtoupper($tag_name))
{
$this->in_entry = true;
$this->version = 'ATOM';
$this->feed['VERSION'] = 'ATOM';
}
}

// Handler: Tag close
private function _tag_close($parser, $tag_name)
{
$this->current_element = '';

if ('ITEM' == strtoupper($tag_name))
{
$this->in_item = false;
$this->current_item ++;
}

if ('IMAGE' == strtoupper($tag_name))
{
$this->in_image = false;
}

if ('ENTRY' == strtoupper($tag_name))
{
$this->in_entry = false;
$this->current_item ++;
}
}

// Handler: Tag data
private function _tag_data($parser, $data)
{
$tag_name = $this->current_element;
$data = trim($data);
$data = preg_replace("/[\r|\n]/s", '', $data);

if (!$this->in_item && !$this->in_entry)
{
// RSS attribute
if ($tag_name)
{
if (!$this->in_image)
{
$this->feed[$tag_name] .= $data;
}

else if ($tag_name != 'IMAGE')
{
$this->feed['IMAGE'][$tag_name] .= $data;
}
}
}

else
{
// In item
if ($tag_name && $tag_name != 'ITEM' && $tag_name != 'ENTRY')
{
if (!$this->in_image)
{
$this->feed['FEED'][$this->current_item][$tag_name] .= $data;
}

else if ($tag_name != 'IMAGE')
{
$this->feed['FEED'][$this->current_item]['IMAGE'][$tag_name] .= $data;
}
}
}
}

// Rebuild
private function _rebuild_feed()
{
for ($i = 0; $i < count($this->feed['feed']); $i++)
{
// RSS
if ($this->feed['FEED'][$i]['DC:DATE'])
{
$this->feed['FEED'][$i]['PUBTIMESTAMP'] = strtotime($this->feed['FEED'][$i]['DC:DATE']);
}

else if ($this->feed['FEED'][$i]['PUBDATE'])
{
$this->feed['FEED'][$i]['PUBTIMESTAMP'] = strtotime($this->feed['FEED'][$i]['PUBDATE']);
}

// ATOM
else if ($this->feed['FEED'][$i]['PUBLISHED'])
{
$this->feed['FEED'][$i]['PUBTIMESTAMP'] = strtotime($this->feed['FEED'][$i]['PUBLISHED']);
}

else if ($this->feed['FEED'][$i]['UPDATED'])
{
$this->feed['FEED'][$i]['PUBTIMESTAMP'] = strtotime($this->feed['FEED'][$i]['UPDATED']);
}

// RSS 0.9x
if (!$this->feed['FEED'][$i]['PUBTIMESTAMP'])
{
$this->feed['FEED'][$i]['PUBTIMESTAMP'] = time();
}

// ATOM
if (!$this->feed['FEED'][$i]['DESCRIPTION'])
{
$this->feed['FEED'][$i]['DESCRIPTION'] = $this->feed['FEED'][$i]['SUMMARY'] ? $this->feed['FEED'][$i]['SUMMARY'] : 'NO DESCRIPTION';
}
}

return $this->feed;
}
}

// Current class name
$classname = 'BsmFeedParser';
?>
[/PHP]

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