How to skip first regex match?

Question

Is there anyway to skip the first match when using regex and php.

Or is there some way of achieveing this using str_replace.

Thanks

UPDATE

Answer 1

Easy PHP way:

will give you "AN".

UPDATE: Didn't know it was a replace. Try this:

Find the first match and remember where it was, then delete everything, then put whatever was in the first spot back in.