note 129129 added to function.filter-var

Actually, this is not really a helpful comment for a manual (so, don't upvote), but as search engines don't find a lot of occurrences for the error message and especially no helpful hint, it might save somebody some time. If you're getting an error message like "filter_var(): Unknown filter with ID 2097152" or a different number, you just accidentally mixed up the parameters. So, instead of <?php filter_var($ip, FILTER_FLAG_IPV6) ?> you should try it with <?php filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) ?> and it will work ;) I know, this isn't the most intuitive form you can design a function and it's tempting to throw everything into one param as it is done for regular checks, but, yeah, it is how it is. ---- Server IP: 45.112.84.4 Probable Submitter: 45.91.157.134 (proxied: 31.19.238.161) ---- Manual Page -- https://php.net/manual/en/function.filter-var.php Edit -- https://main.php.net/note/edit/129129 Del: integrated -- https://main.php.net/note/delete/129129/integrated Del: useless -- https://main.php.net/note/delete/129129/useless Del: bad code -- https://main.php.net/note/delete/129129/bad+code Del: spam -- https://main.php.net/note/delete/129129/spam Del: non-english -- https://main.php.net/note/delete/129129/non-english Del: in docs -- https://main.php.net/note/delete/129129/in+docs Del: other reasons-- https://main.php.net/note/delete/129129 Reject -- https://main.php.net/note/reject/129129 Search -- https://main.php.net/manage/user-notes.php