note 130443 added to function.filter-var

var_dump(filter_var(null, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE)); <- returns false you would expect this to return null because it uses FILTER_NULL_ON_FAILURE "On success returns the filtered data. On failure false is returned, unless the FILTER_NULL_ON_FAILURE flag is used, in which case null is returned." The filter_var() function first coerces null to an empty string before applying the filter so it is actually doing var_dump(filter_var('', FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE)); <- returns false ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 62.30.203.184) ---- Manual Page -- https://php.net/manual/en/function.filter-var.php Edit -- https://main.php.net/note/edit/130443 Del: integrated -- https://main.php.net/note/delete/130443/integrated Del: useless -- https://main.php.net/note/delete/130443/useless Del: bad code -- https://main.php.net/note/delete/130443/bad+code Del: spam -- https://main.php.net/note/delete/130443/spam Del: non-english -- https://main.php.net/note/delete/130443/non-english Del: in docs -- https://main.php.net/note/delete/130443/in+docs Del: other reasons-- https://main.php.net/note/delete/130443 Reject -- https://main.php.net/note/reject/130443 Search -- https://main.php.net/manage/user-notes.php