如何快速的识别出RSS的版本和类型-PHP Tutorial-php.cn

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如何快速的识别出RSS的版本和类型

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Jun 23, 2016 pm 02:13 PM

RSS 命名空间 Atom

现在写的代码只支持RSS2.0,我用socket取得响应内容.有什么方法能取得响应的内容是
RSS1
RSS2
ATOM
RDF

如果解析标签的话太耗时,如果查看namespace的话有好多网站生成的feed，namespace都不写

有作过的同学指点一下

回复讨论(解决方案)

他们是各自独立的标准体系，你打算用同一个代码段来处理他们？

他们是各自独立的标准体系，你打算用同一个代码段来处理他们？

我会用一个方法或函数分析目标feed的响应。知道是atom或rss2，。。。其中的一个,然后交由相应的类来处理item或entry

RSS 均有版本声明的标签

既然你分别有相应的处理类，那么你想讨论的又是什么呢？

你说你用socket取得响应内容，那么就应视为流方式了
可以用内置的xml解析函数（xml_xxxx）来解析，不需要分别写处理类。扩展起来也方便

既然你分别有相应的处理类，那么你想讨论的又是什么呢？
re:
第一步：知道是rss2或atom,我问的是这个

第二步: 如果是rss2 ，委托rss2的处理类
如果是atom ，委托atom的处理类

第三步: 第二步会生成一个我写的标准类实例数组,加以处理

...

可以用内置的xml解析函数（xml_xxxx）来解析，不需要分别写处理类。扩展起来也方便
re:

我不是采过来就显示出来,我还要按我的标准写到数据库中.所以需要不同的处理类找到我需要的内容

feed 节点包含 xmlns 属性 atom 字样
rss 节点的 version 属性指示版本号
rdf 命名空间标识 RDF

只要你不是使用集成的XML处理类（DOMDocument、SimpleXML）处理起来还是很简单的，否则需要做探索(可能旭阳多次加载原始数据)
而xml解析函数只需要一次扫描（尤其是对于你的这种只抽取指定信息的应用）

atom ：xmlns="http://www.w3.org/2005/Atom"
rdf : xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
rss2 : xmlns:dc="http://purl.org/dc/elements/1.1/"

如果都写xmlns也容易判断，就是有很多网站的rss2 都不写xmlns.这点太烦人

这是 ZendFramework 提供的一些格式（在 tests/Zend/Feed/_files 中，应该是比较全的）

tests/Zend/Feed/_files
re:
这个在哪可以访问,可以给个连接吗

既然是做 php 的，尽管不用，但也总是会下一个 ZendFramework 框架看看的吧？
我就下载有很多框架，有比较才能有鉴别

既然是做 php 的，尽管不用，但也总是会下一个 ZendFramework 框架看看的吧？
我就下载有很多框架，有比较才能有鉴别
还真没下过zf

写php只是打酱油

这是 ZendFramework 提供的一些格式（在 tests/Zend/Feed/_files 中，应该是比较全的）

我有一个疑惑如果同时存在rdf和rss的namespace哪光从namespace判断不准呀:
示例

<?xml version='1.0' encoding='UTF-8'?><?xml-stylesheet type='text/xsl' href='http://cnbeta.feedsportal.com/xsl/eng/rss.xsl'?><rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"      xmlns:dc="http://purl.org/dc/elements/1.1/"      xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/"      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" version="2.0"><channel>

或

<?xml version="1.0" encoding="utf-8"?><rdf:RDF  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"  xmlns:admin="http://webns.net/mvcb/"  xmlns:cc="http://web.resource.org/cc/"  xmlns="http://purl.org/rss/1.0/"><channel rdf:about="http://www.w3.org/">

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