How about

((?:\s+[^>]*)?)\s+       # Optional assorted crud

[download]

? The capturing () is not marked with ? (or *) so it won't be undef, but the non-capturing (?:) is marked with ?, so it can fail to match: in that case the () saves an empty string, not undef.

--
http://fruiture.de

In reply to Re: Re: Re: Using undefined back-references? by fruiture
in thread Using undefined back-references? by tommyw

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