how do i validate a url?

[eluser]Shaheer[/eluser]
Hi,

i wanted to validate a url. Using PHP REGEX.

i have got some REGEXs by googling but all of them have flaws in them.

I wanted to match

all of these:
http://www.google.com
https://www.google.com
www.google.com
http://google.com
google.com/anything (or ?query )

but not javascript-: or mailto: can anyone help?

hey i am trying to type js protocol but expression-engine (the cms used here) removes it