regex - Regular expression to find URLs within a string

Question

Does anyone know of a regular expression I could use to find URLs within a string? I've found a lot of regular expressions on Google for determining if an entire string is a URL but I need to be able to search an entire string for URLs. For example, I would like to be able to find www.google.com and http://yahoo.com in the following string:

Hello www.google.com World http://yahoo.com

I am not looking for specific URLs in the string. I am looking for ALL of the URLs in the string which is why I need a regular expression.

Answer 1

This is the one I use

(http|ftp|https)://([w_-]+(?:(?:.[w_-]+)+))([w.,@?^=%&:/~+#-]*[w@?^=%&/~+#-])

Works for me, should work for you too.