This regex will work: m{<REF HREF="?(.*?)"?\s*/>}

Note that you do not have to escape the quotes. The only characters you have to escape are : \ | ( ) [ { ^ $ + ?

Update: Also . and * need to be escaped. (thanks Tachyon)

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law

In reply to Re: Matching optionally quoted string by CountZero
in thread Matching optionally quoted string by JoshuaD

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