[php-src] Issue #12567: FILTER_VALIDATE_INT has inconsistent behavior with true/false

Issue: https://github.com/php/php-src/issues/12567 Author: ebrigham1 ### Description The following code: ```php <?php declare(strict_types=1); var_dump(filter_var(true, FILTER_VALIDATE_INT)); var_dump(filter_var(false, FILTER_VALIDATE_INT)); var_dump(filter_var(true, FILTER_VALIDATE_INT, ['flags' => FILTER_NULL_ON_FAILURE])); var_dump(filter_var(false, FILTER_VALIDATE_INT, ['flags' => FILTER_NULL_ON_FAILURE])); ``` Resulted in this output: ``` int(1) bool(false) int(1) NULL ``` But I expected this output instead: ``` bool(false) bool(false) NULL NULL ``` https://3v4l.org/UuTcm It might be equally as valid to expect false to produce int(0), I'm not sure. The thing that confuses me is that false and true are treated inconsistently. ### PHP Version PHP 8.2.11 ### Operating System _No response_