正则表达式：在字符串前面找到另一个字符串的最后一次出现

I have a pretty huge string (a big chunk of html), in which I'd like to find a chunk according to this scenario:

我有一个非常庞大的字符串（一大块html），根据这个场景，我想找到一个块：

<h2>Some text here</h2>
<p>Lorem ipsum... Lorem ipsum... String1... Lorem ipsum...</p>
<p>More Lorem ipsum... More Lorem ipsum...</p>

<h2>Some more text here</h2>
<p>Lorem ipsum... Lorem ipsum... String2... Lorem ipsum...</p>
<p>More Lorem ipsum... More Lorem ipsum...</p>

<h2>Another chunk here, same string</h2>
<p>Lorem ipsum... Lorem ipsum... String2... Lorem ipsum...</p>
<p>More Lorem ipsum... More Lorem ipsum...</p>

<h2>And even more text here</h2>
<p>Lorem ipsum... Lorem ipsum... String3... Lorem ipsum...</p>
<p>More Lorem ipsum... More Lorem ipsum...</p>

I'd like to find the last chunk, starting with the h2 and ending before the next h2, and which includes "String2", which in the example above would be

我想找到最后一个块，从h2开始并在下一个h2之前结束，其中包括“String2”，在上面的示例中将是

<h2>Another chunk here, same string</h2>
<p>Lorem ipsum... Lorem ipsum... String2... Lorem ipsum...</p>
<p>More Lorem ipsum... More Lorem ipsum...</p>

Can anybody help me with this? I use PHP's preg-flavour of RegEx. I get stuck after the

任何人都可以帮我吗？我使用PHP的PreEx风格的RegEx。我被卡住了

<h2(.*+)String2<h2/im

and cannot get my head around how to find the last one only.

并且无法理解如何找到最后一个。

Thanks!

谢谢！

1 个解决方案

#1

You can use an approach like this:

你可以使用这样的方法：

<h2>(?:[^\0](?!<h2>))*?String2[^\0]*?(?=<h2>)

Regex live here.

正则表达式住在这里。

#1