note 98036 deleted from function.filter-var by danbrown

Note Submitter: Anonymous 

----

<?php

if (filter_var('http://www.....com/abcd', FILTER_VALIDATE_URL) != FALSE)
{
	echo "valid url";
}
else
{
	echo "invalid url";
}

?>

Why is this valid? The host is not valid...

filter_var('http://www.abc_def.com/abcd', FILTER_VALIDATE_URL)
filter_var('http://www.abc#$%^&def.com/abcd', FILTER_VALIDATE_URL)

Also valid... Why? Because it's invalid... Do I something wrong?

I'm searching the best way to validate the host. Using regex is hard because of the new accepted i18n chars in domainname aka host. And using parse_url is just a nice explode, it does not check the parts for validity.