RegExp get string inside string

Question

Let presume we have something like this:

<div1>
    <h1>text1</h1>
    <h1>text2</h1>
</div1>
<div2>
    <h1>text3</h1>
</div2>

Using RegExp we need to get text1 and text2 but not text3.

How to do this?

Thanks in advance.

EDIT: This is just an example. The text I'm parsing could be just plain text. The main thing I want to accomplish is list all strings from a specific section of a document. I gave this HTML code for example as it perfectly resembles the thing I need to get.

(?siU)<h1>(.*)</h1> would parse all three strings, but how to get only first two?

EDIT2: Here is another rather dumb example. :)

Section1

This is a "very" nice sentence.
It has "just" a few words.

Section2

This is "only" an example.

The End

I need quoted words from first but not from second section.

Yet again, (?siU)"(.*)" returns quoted words from whole text, and I need only those between words Section1 and Section2.

This is for the "Rainmeter" application, which apparently uses Perl regex syntax.

I'm sorry, but I can't explain it better. :)

Answer 1

Use a DOM library and getElementsByTagName('div') and you'll get a nodeList back. You can reference the first item with ->item(0) and then getElementsByTagName('h1') using the div as a context node, grab the text with ->nodeValue property.

Answer 2

For the general case of the two examples provided -- for use in Rainmeter regex -- you can use:

(?siU)<h1>(.*)</h1>(?=.+<div2>) for the first sample and

(?siU)"(.*)"(?=.+Section2) for the second.

Note that Rainmeter seems to escape things for you, but you might need to change " to \", above.

These both use Positive Lookahead but beware: both solutions will fail in the case of nested tags/structures or if there are mutiple Section1's and Section2's. Regex is not the best tool for this kind of parsing.

But maybe this is good enough for your current needs?