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Bug #68761 filter_var(null) returns false with FILTER_NULL_ON_FAILURE
Submitted: 2015-01-06 22:17 UTC Modified: 2016-09-26 14:47 UTC
Votes:2
Avg. Score:3.0 ± 0.0
Reproduced:2 of 2 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: tonyli dot lives at gmail dot com Assigned: cmb (profile)
Status: Closed Package: Filter related
PHP Version: 5.5.20 OS: Ubuntu 12.04
Private report: No CVE-ID: None
 [2015-01-06 22:17 UTC] tonyli dot lives at gmail dot com
Description:
------------
Even with the flag on, trying to filter null returns false when it should be still null (as null is not a boolean).

As per the documentation:

If FILTER_NULL_ON_FAILURE is set, FALSE is returned only for "0", "false", "off", "no", and "", and NULL is returned for all non-boolean values.

Similar to: https://bugs.php.net/bug.php?id=67167

Test script:
---------------
var_dump(filter_var(null, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE));
var_dump(filter_var(false, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE));
var_dump(filter_var(true, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE));
var_dump(filter_var('test', FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE));

Expected result:
----------------
bool(false)
bool(false)
bool(true)
NULL

Actual result:
--------------
NULL
bool(false)
bool(true)
NULL

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2015-01-15 10:53 UTC] ppasindud at gmail dot com
Works correctly in php-src master
 [2016-09-26 14:47 UTC] cmb@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: cmb
 [2016-09-26 14:47 UTC] cmb@php.net
That issue has been resolved as of PHP 5.4.8, see
<https://3v4l.org/cBDRY>.
 
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