note 130651 added to filter.constants

We can add FILTER_FLAG_EMPTY_STRING_NULL: <?php - function filter_sanitize_string(mixed $value, int $flags = 0): string|false { + function filter_sanitize_string(mixed $value, int $flags = 0): string|false|null { + if ($flags & FILTER_FLAG_EMPTY_STRING_NULL && $value === "") { + return null; + } ?> For FILTER_FLAG_STRIP_BACKTICK, there is a bug history (https://bugs.php.net/bug.php?id=69202) so I did not attempt to code compatility through version history. ---- Server IP: 206.189.2.9 Probable Submitter: 2604:3d08:5e7b:f300:649d:ed01:f6c5:7ae7 ---- Manual Page -- https://php.net/manual/en/filter.constants.php Edit -- https://main.php.net/note/edit/130651 Del: integrated -- https://main.php.net/note/delete/130651/integrated Del: useless -- https://main.php.net/note/delete/130651/useless Del: bad code -- https://main.php.net/note/delete/130651/bad+code Del: spam -- https://main.php.net/note/delete/130651/spam Del: non-english -- https://main.php.net/note/delete/130651/non-english Del: in docs -- https://main.php.net/note/delete/130651/in+docs Del: other reasons-- https://main.php.net/note/delete/130651 Reject -- https://main.php.net/note/reject/130651 Search -- https://main.php.net/manage/user-notes.php