Parser: match starting tags to ending tags in order to retrieve the content

[alexprut]

In order to add fallbacks support we need to be able to match starting tags to ending tags in order to retrieve the content.

Example

<div data-sd="property">
    Content
    <div data-sd="property">
        Content
    </div>
    <meta data-sd="property" content="Content" />
</div>

First match

    Content
    <div data-sd="property">
        Content
    </div>
    <meta data-sd="property" content="Content" />

Second match

        Content

Third match

                                      Content

The problem

• Match self-contained tags
• Match starting tags to ending tags
• Match nested starting tags to ending tags
• Ordered matches, up → down matches flow

The solutions

• It's nearly impossible to solve that problem with regex, see why: https://stackoverflow.com/questions/701166/can-you-provide-some-examples-of-why-it-is-hard-to-parse-xml-and-html-with-a-reg
• Use a HTML DOM parser, but the PHP DOMDocument class filters the HTML, so it changes the content
• Use a HTML DOM parser, third-party library

Is there any Joomla parser library to solve that problem?