Regular expression for checking website url

Question

I need to check the web address, using regular expression.

if user type url as

1. www.test.com
2. http://www.test.com
3. https://www.test.com

Answer 1

Pattern

(https?:\/\/)?([\w\d]+\.)?[\w\d]+\.\w+\/?.+

This will work for matching:

www.demo.com

http://foo.co.uk/