[SOLVED] Perfect URL validation

[detest]

I've come across some URL validation regexes and even a PHP function, but they all contain flaws!

 

ex. the PHP function: filter_var($url, FILTER_VALIDATE_URL)

This says the input "http://www.example.com/http://www.example.com/" is valid!

 

ex. the regex: return preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $url);

This also says the input "http://www.example.com/http://www.example.com/" is valid!

 

 

So I would like perfect URL validation.

Also, I would like to avoid "http://", so the inputted url "www.example.com" would be valid.

 

Thanks in advance. 

[Mchl]

Well... they are valid... sort of... http://en.wikipedia.org/wiki/Http://example.com

[detest]

Ah.. I never thought of that.

 

How can I properly validate it without "http://" though?

[thebadbad]

To make a match optional in regular expressions, put it inside parentheses and add a question mark right after it:

 

preg_match('|^(http(s)?://)?[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $url);

[detest]

k thanks