regex match urls NOT containing given set of strings

Question

I need to match all urls that DO NOT contain either /admin/ or ?page=.

I'll be using this as a redirect rule in an iirf.ini file (supports htaccess syntax).

How can I accomplish this?

Answer 1

Use a negative look-ahead (?!...) with a regex OR (a|b):

^(?!.*(/admin/|\?page=))

This is saying that when positioned at the start (^) the input should contain either of your two test strings