解析HTML以使用PHP从ids和类属性返回CSS规则

Question

I hate to have to write down a lot of CSS rules and then enter my styles in it, so I'd like to develop a tiny php script that would parse the HTML I'd pass to it and then return empty CSS rules.

I decided to use PHP's DomDocument.

The question is: How could I loop through the whole structure? (I saw that for example DomDocument only has getElementByTag or getElementById and no getFirstElement for example)

I only want to get the ids and the classes in a given block of HTML code, I'd pass things like:

<div id="testId">
    <div class="testClass">
        <span class="message error">hello world</span>
    </div>
</div>

I only want to know how could I loop through every node?

Thanks!

Answer 1

The SimpleXML extension for PHP may help you. It work perfectly to navigate through HTML tree.

http://www.php.net/manual/en/simplexml.examples-basic.php