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PHP获取博客数据的实现方法

Jun 13, 2016 am 11:12 AM
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目前很多的网站提供免费个人博客服务,如Google,新浪,网易等等,如何将免费的博客充分利用起来,需要我们在使用过程中不断总结和思考,对于 程序员来说,如何使用PHP获取Blogger博客RSS或Atom数据显得非常重要,在这里简单的跟大家介绍一下使用PHP获取blogger博客 RSS或Atom数据的基本方法,以PHP获取google的Blogger博客数据为实例,了解PHP获取RSS或Atom数据的基本原理,供参考。

PHP获取博客数据使用前提

有一个Google的Blogger免费空间。
获取免费空间的RSS或Atom地址http://shifen.blogspot.com/feeds/posts/default

PHP获取博客数据实例代码

<ol class="dp-xml list-paddingleft-2">
<li><p>$<span class="attribute">blogUrl</span> = <span class="attribute-value">'http://shifen.blogspot.<br>com/feeds/posts/default'</span>;   </p></li>
<li><p>$<span class="attribute">atom</span> = <span class="attribute-value">simplexml_load_file</span> ( $blogUrl );   </p></li>
<li><p>$atom-<span class="tag">></span>registerXPathNamespace (<br> 'atom', 'http://www.w3.org/2005/Atom' );   </p></li>
<li><p>$<span class="attribute">title</span> = $atom-<span class="tag">></span>title;   </p></li>
<li><p>$<span class="attribute">subtitle</span> = $atom-<span class="tag">></span>subtitle;   </p></li>
<li><p>$<span class="attribute">blogFeeds</span> = $atom-<span class="tag">></span>link [0] [href];   </p></li>
<li><p>$<span class="attribute">blogURL</span> = $atom-<span class="tag">></span>link [2] [href];   </p></li>
<li><p>$<span class="attribute">blogNextURL</span> = $atom-<span class="tag">></span>link [3] [href];   </p></li>
<li><p>$<span class="attribute">entrys</span> = $atom-<span class="tag">></span>xpath ( '//atom:entry' );  </p></li>
</ol>
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PHP获取博客数据代码分析

1,定义博客blogger地址,如:$blogUrl = 'http://shifen.blogspot.com/feeds/posts/default';

2,使用PHP内置simplexml_load_file函数将blogger的XML数据转化成对象。

simplexml_load_file相关知识(具体查看PHP手册)
说明:simplexml_load_file 将一个XML文档装载入一个对象中。
原型:simplexml_load_file ( filename [,class_name [,options [, ns [, is_prefix]]]] )

3,使用PHP内置registerXPathNamespace函数为下一次 XPath 查询创建命名空间语境。与前面simplexml_load_file函数组合,支持提供命名空间,Blogger的命名空间使用的是http://www.w3.org/2005/Atom,便于调用Blogger的RSS或Atom数据。

4,获取Blogger的RSS或Atom数据。

(1)获取Blogger博客空间标题,如:$atom->title,返回:十分愉快
(2)获取Blogger博客空间次标题,如:$atom->subtitle,返回:学学东西总是好的,能让你十分愉快!
(3)获取Blogger博客RSS地址,如:$atom->link [0] [href],返回:http://shifen.blogspot.com/feeds/posts/default
(4)获取Blogger博客URL地址,如:$atom->link [2] [href],返回:http://shifen.blogspot.com/
(5)获取Blogger博客RSS的下一页地址,如:$atom->link [3] [href],返回:http://shifen.blogspot.com/feeds/posts/default?start-index=26&max-results=25
(6)获取Blogger博客文章内容,如:$atom->xpath ( '//atom:entry' ),返回文章数组,默认最新发布的25篇文章。

上面PHP获取博客数据实例可知,PHP获取Blogger博客RSS或Atom数据使用simplexml_load_file和registerXPathNamespace两个内置函数即可轻松实现。

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