note 77042 added to ref.filter

I recommend you to use the FILTER_REQUIRE_SCALAR (or FILTER_REQUIRE_ARRAY) flags, since you can use array-brackets both to access string offsets and array-element -- however, not only this can lead to unexpected behaviour. Look at this example: <?php $image = basename(filter_input(INPUT_GET, 'src', FILTER_UNSAFE_RAW, FILTER_FLAG_STRIP_LOW)); // further checks ?> /script.php?src[0]=foobar will cause a warning. :-( Hence my recommendation: <?php $image = basename(filter_input(INPUT_GET, 'src', FILTER_UNSAFE_RAW, FILTER_REQUIRE_SCALAR | FILTER_FLAG_STRIP_LOW)); // further checks ?> ---- Server IP: 217.13.201.10 Probable Submitter: 172.158.38.223 ---- Manual Page -- http://www.php.net/manual/en/ref.filter.php Edit -- https://master.php.net/note/edit/77042 Del: integrated -- https://master.php.net/note/delete/77042/integrated Del: useless -- https://master.php.net/note/delete/77042/useless Del: bad code -- https://master.php.net/note/delete/77042/bad+code Del: spam -- https://master.php.net/note/delete/77042/spam Del: non-english -- https://master.php.net/note/delete/77042/non-english Del: in docs -- https://master.php.net/note/delete/77042/in+docs Del: other reasons-- https://master.php.net/note/delete/77042 Reject -- https://master.php.net/note/reject/77042 Search -- https://master.php.net/manage/user-notes.php