m{ <div (?: (?! </div) .)+ (</div)? }xms)

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Can you please give a brief explanation regarding how the above regex works? It seems to use a few constructs I've never seen before and searching Google for regex symbols doesn't work very well. In particular, is enclosing a regex in 'm()', as you have done above, equivalent to enclosing it in '//'? What is the trailing xms doing?

In reply to Re^4: problem with optional capture group by Special_K
in thread problem with optional capture group by Special_K

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