Regex match domain name without www and keep website.com still intact

Question

I have this regex

^(?:http(?:s)?://)?(?:www(?:[0-9]+)?\.)

to strip off the www and http(s):// part of any domain name and give just the domain name. It works with:

• example.com
• http://example.com
• http://www.example.com

But when used with a domain name starting with letter w it strips the w off

• website.com => ebsite.com

Any ideas on how to make it better? Please test it with this data set http://regexr.com/3abl2

Thanks

Answer 1

I think you want something like this:

^(?:https?:\/\/)?(?:www\.)?(.*)$

Please see this Regex Demo for examples and explanation.

UPDATE It looks like you also want to omit www0, www1, etc.? Then you'll want this:

^(?:https?:\/\/)?(?:www[0-9]*\.)?(.*)$

Please see updated demo here.

Answer 2

• Drop the part (?:[0-9]+)?.) from the regex

• Add optional quantifier ? to www. Matches zero or one www

The regex can be written as

^(?:http(?:s)?:\/\/)?(?:www)?

Regex Demo