I want a regular expression that matches the following
example.com -> matches, returns example.com
foo-bar.com -> matches, returns foo-bar.com
www.example.com -> does not match
www.foo-bar.com -> does not match
Easy? I just need the PERL compatible regular expression that tests if the string does not begin with www., and if so, captures and returns the whole string.
You should be able to use this:
/^(?!www\.)(.*)$/
Explanation:
^ and $ anchor the match, so it has to match the entire string given.(?!www\.) is a negative lookahead, which blocks the match if the string starts with www..(.*) captures the entirety of the string.