php filter functions for url validation

[rubing]

I need to validate a URL coming from a form (method=post),  so I am using the following code:

 

$validurl=filter_input(INPUT_POST,'website', FILTER_VALIDATE_URL);

           if ($validurl ===FALSE)
		{
			throw new InvalidInputException();
		}

 

It doesn't do as good of a job as I'd expect.  (i know, i know, i could use pear RFC validation, blah blah blah...), If I pass in something like xkjvi://mymamma.comlhj , it is accepted without a problem.  

 

the documenation says that the following optional flags:  

 

FILTER_FLAG_PATH_REQUIRED & FILTER_FLAG_QUERY_REQUIRED

 

,but im not sure what they do or how i would set them, since the manual just says:

 

Associative array of options or bitwise disjunction of flags. If filter accepts options, flags can be provided in "flags" field of array.

 

And I have no idea what that means

[DeanWhitehouse]

can you not make your own function using a reg-ex to check for certain chars.

[rubing]

Why would I do that if it's built-in?

[DeanWhitehouse]

because it's not working as well as you thought, you should of been able to answer that your self.

[rubing]

i'm not trying to hack my way to a solution.  I am trying to learn something about coding php and taking advantage of its built-in functions.

 

Maybe, I'm not doing something right, maybe there's something that can be done with the optional flags.  I don't ven know what there there for or how to set them.  I find that gap in my knowledge disturbing and so am asking for help.

 

now, i just found out that the Validate url filter is no different than the parse_url function.