Code to extract ONLY the domain.com part of an address?

[hstraf]

I am trying to find some code that will "extract" only the domain.com portion of some text input.

For example of possible input:

www.domain.com
http://domain.com
http://www.domain.com

Basically, I need only the "www." and "http://" part striped away.. if it exists.

Thanks!

[Hulkur]

preg_replace('/((^http:\/\/www\.)|(^http:\/\/)|(^www\.))/', '', $input);

you can't use just (www\.) as it will cut out all 'www.' from string: www.thiswww.com -> this.com

[Mandibal]

i'm not a regex expert so i dont know the exact regex to use but in Hulkur example it would be better so that you cover all possible cases to not use http: or www in the regex but to do (in english not regex) search from beginning of string for any characters EXCEPT a period until you get to the first period then stop so you would cover http://blah.domain.com as well. Sorry that i dont have the regex for ya. Maybe a guru will be able to post it for us?

[Mandibal]

maybe this '^[^.]*\.' not sure if the * is in the right place.

[Gaheris]

You might want to have a look at parse_url.

[Hulkur]

if you want domain starting from first dot then:

preg_replace('/([^\.]+\.)/', '', $input);