I have no clue if it's a blug or if it is as intended, in which case the documentation needs to be fixed.When the flag is used on a validation filter other than FILTER_VALIDATE_BOOLEAN, as expected the filter will return NULL instead of FALSE upon failure.The version reported by the UEFI firmware resource device should not have changed.Steps Note The feedback system for this content will be changing soon. If content within a comment thread is important to you, please save a copy.If FILTER_NULL_ON_FAILURE is not used then NULL is returned when the variable name is not set in the external variable array, TRUE is returned for "1", "true", "on" and "yes" and FALSE is returned for everything else.FILTER_FLAG_QUERY_REQUIRED is failing URLs that are encoded e.g. q=big So anything more than one word encoded fails.Returns: PHP Version: 5.2.14 //On MY server, may be different depending on which version you have installed.
FILTER_VALIDATE_URL does not work with URNs, examples of valid URIs according to RFC3986 and if they are accepted by FILTER_VALIDATE_URL: [PASS] ftp://example.org/rfc/rfc1808[PASS] gopher://spinaltap.example.edu/00/Weather/California/Los Angeles [PASS] mailto:[email protected][PASS] news:comp.[PASS] telnet://example.edu/ [PASS] ldap://[2001:db8::7]/c=GB? In 2007 someone suggested it's not acceptable (see https://net/bug.php?In other words, names that can * be resolved to MX RRs or address (i.e., A or AAAA) RRs (as discussed * in Section 5) are permitted, as are CNAME RRs whose targets can be * resolved, in turn, to MX or address RRs.Local nicknames or * unqualified names MUST NOT be used. [email protected][PASS] news:comp.[FAIL] tel: 1-816-555-1212 [PASS] telnet://192.0.2./ [FAIL] urn:oasis:names:specification:docbook:dtd:xml:4.1.2 Notably missing is a way to validate text entry as printable,printable multiline,or printable and safe (tag free)FILTER_VALIDATE_TEXT, which validates no special charactersperhaps with FILTER_FLAG_ALLOW_NEWLINEand FILTER_FLAG_NOTAG to disallow tag starters A word to the wise regarding floats.$t = '312041.25 € instead of 896.70 €';echo filter_var ($t, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);will return312041.25896.70which is likely not what you were expecting.id=40156&edit=2) but it was flagged "not a bug" because these kind of filters are only supposed to filter out illegal characters.