Validating an URL string

[asantos]

Hi,
i have a blog registration form and I need to validate the URL field.

A) For example, if user enters blablabla.com (wrong)
That should be [blablabla.com...] (right)

B) Also, if user enters ttp://blablabla.com (wrong)
That should be [blablabla.com...] (right)

Right now i am using parse_url to do the validation, but it doesnt help too much when "http://" is not entered. What could i do? Regexp? If yes, pls example.

[mcavic]

preg_match()

[asantos]

Any examples i can watch? im not very familiar to preg_match cases.

[barns101]

The PHP manual page for preg_match() [php.net] lists examples.