From: Operating system: Linux PHP version: 5.2.13 Package: Filter related Bug Type: Bug Bug description:FILTER_NULL_ON_FAILURE flag automatically set in filter_input() functions.
Description: ------------ * This is different than bug http://bugs.php.net/bug.php?id=41305 * The filter_var() vs. the filter_input() behave differently when using the FILTER_VALIDATE_BOOLEAN filter when the variable/input doesn't exist. More specifically, it seems as if the FILTER_NULL_ON_FAILURE flag is set automatically in the filter_input() function. (Note: same behavior for filter_var_array() vs. filter_input_array()). >From PHPINFO(): filter.default = unsafe_raw filter.default_flags = no value Revision: 1.52.2.39.2.16 Test script: --------------- <?php // example.com/script.php?arg1=yes&arg3=no // filtering by variable $var1 = filter_var($_GET["arg1"], FILTER_VALIDATE_BOOLEAN); $var2 = filter_var($_GET["arg2"], FILTER_VALIDATE_BOOLEAN); $var3 = filter_var($_GET["arg3"], FILTER_VALIDATE_BOOLEAN); // filtering by input $input1 = filter_input(INPUT_GET, "arg1", FILTER_VALIDATE_BOOLEAN); $input2 = filter_input(INPUT_GET, "arg2", FILTER_VALIDATE_BOOLEAN); $input3 = filter_input(INPUT_GET, "arg3", FILTER_VALIDATE_BOOLEAN); // as expected... var_dump($var1); // bool(true) var_dump($var2); // bool(false) var_dump($var3); // bool(false) // NULL is not an expected return unless the FILTER_NULL_ON_FAILURE flag is set... var_dump($input1); // bool(true) var_dump($input2); // NULL var_dump($input3); // bool(false) ?> Expected result: ---------------- As per the documentation, we expect the output of the code above to be: bool(true) bool(false) bool(false) bool(true) bool(false) bool(false) Actual result: -------------- Even though the FILTER_NULL_ON_FAILURE flag is NOT set, we DO get a NULL value in the output: bool(true) bool(false) bool(false) bool(true) NULL bool(false) -- Edit bug report at http://bugs.php.net/bug.php?id=51344&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=51344&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=51344&r=trysnapshot53 Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=51344&r=trysnapshot60 Fixed in SVN: http://bugs.php.net/fix.php?id=51344&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51344&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=51344&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=51344&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=51344&r=needscript Try newer version: http://bugs.php.net/fix.php?id=51344&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=51344&r=support Expected behavior: http://bugs.php.net/fix.php?id=51344&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=51344&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=51344&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=51344&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51344&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=51344&r=dst IIS Stability: http://bugs.php.net/fix.php?id=51344&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=51344&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=51344&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=51344&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=51344&r=mysqlcfg
