note 98036 added to function.filter-var

<?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.
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Server IP: 91.199.167.223
Probable Submitter: 94.214.169.162
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Manual Page -- http://www.php.net/manual/en/function.filter-var.php
Edit        -- https://master.php.net/note/edit/98036
Del: integrated  -- https://master.php.net/note/delete/98036/integrated
Del: useless     -- https://master.php.net/note/delete/98036/useless
Del: bad code    -- https://master.php.net/note/delete/98036/bad+code
Del: spam        -- https://master.php.net/note/delete/98036/spam
Del: non-english -- https://master.php.net/note/delete/98036/non-english
Del: in docs     -- https://master.php.net/note/delete/98036/in+docs
Del: other reasons-- https://master.php.net/note/delete/98036
Reject      -- https://master.php.net/note/reject/98036
Search      -- https://master.php.net/manage/user-notes.php