使用PHP进行DOM操作 [英] DOM Manipulation with PHP
问题描述
我想用PHP对DOM Elements进行简单但非琐碎的操作，但我迷失了.
I would like to make a simple but non trivial manipulation of DOM Elements with PHP but I am lost.
假设有一个类似Wikipedia的页面，其中有段落和标题(<p>，<h2>).他们是兄弟姐妹.我想按顺序考虑这两个要素.
Assume a page like Wikipedia where you have paragraphs and titles (<p>, <h2>). They are siblings. I would like to take both elements, in sequential order.
我已经尝试过GetElementbyName，但是那样您就不可能组织信息了.
我尝试过DOMXPath->query()，但发现它确实令人困惑.
I have tried GetElementbyName but then you have no possibility to organize information.
I have tried DOMXPath->query() but I found it really confusing.
只需解析如下内容:
<html>
<head></head>
<body>
<h2>Title1</h2>
<p>Paragraph1</p>
<p>Paragraph2</p>
<h2>Title2</h2>
<p>Paragraph3</p>
</body>
</html>
进入:
Title1
Paragraph1
Paragraph2
Title2
Paragraph3
使用一点点HTML代码，我不需要所有这些代码.
With a few bits of HTML code I do not need between all.
谢谢.我希望问题看起来不像是家庭作业.
Thank you. I hope question does not look like homework.
推荐答案
我认为DOMXPath->query()是正确的方法.该XPath表达式将返回同一级别上的所有<h2>或<p>节点(因为您说过它们是同级的).
I think DOMXPath->query() is the right approach. This XPath expression will return all nodes that are either a <h2> or a <p> on the same level (since you said they were siblings).
/html/body/*[name() = 'p' or name() = 'h2']节点将作为节点列表返回.正确的顺序(文档顺序).然后，您可以在结果上构造一个foreach循环.
The nodes will be returned as a node list in the right order (document order). You can then construct a foreach loop over the result.
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