Bug #76385 [Opn->Ver]: Value of PHP_INT_MIN cannot be used as default value for int parameter

Edit report at https://bugs.php.net/bug.php?id=76385&edit=1 ID: 76385 Updated by: requinix@php.net Reported by: sebastian@php.net Summary: Value of PHP_INT_MIN cannot be used as default value for int parameter -Status: Open +Status: Verified Type: Bug Package: Scripting Engine problem Operating System: Irrelevant PHP Version: 7.2.6 Block user comment: N Private report: N New Comment: This bug is hilarious: The problem is that PHP parses "-9223372036854775808" not as a negative number but as a "-" followed by "9223372036854775808". The latter value is, of course, just barely too large for an integer so it overflows to a float. Previous Comments: ------------------------------------------------------------------------ [2018-05-29 06:57:25] sebastian@php.net It appears I stripped down the problem I am faced with too much for this bug report. I am sorry about that. I came across this in the context of https://github.com/sebastianbergmann/phpunit-mock-objects/issues/419. More specifically, https://github.com/sebastianbergmann/phpunit-mock-objects/issues/419#issuecomment-392662972. When function f(int $i = PHP_INT_MIN) {} is introspected using the Reflection API, getDefaultValue() does not return "PHP_INT_MIN" for $i but rather the value of that constant. And while I think that the Reflection API should be extended to optionally return the "real" default value as it stands in the code, I still believe that function f(int $i = -9223372036854775808) {} should work. ------------------------------------------------------------------------ [2018-05-29 06:44:09] gooh@php.net The value of PHP_INT_MIN (but not of PHP_INT_MAX) is a float apparently. You can use function f(int $i = PHP_INT_MIN) {} as a workaround. ------------------------------------------------------------------------ [2018-05-29 06:26:16] sebastian@php.net It appears that the value of PHP_INT_MIN is generally not recognized as being an integer value: $ cat a.php <?php var_dump(PHP_INT_MIN); var_dump(is_int(-9223372036854775808)); $ php -n a.php int(-9223372036854775808) bool(false) ------------------------------------------------------------------------ [2018-05-29 06:16:24] sebastian@php.net Description: ------------ $ cat a.php <?php var_dump(PHP_INT_MIN); $ cat b.php <?php function f(int $i = -9223372036854775808) { } $ php -nv PHP 7.2.6 (cli) (built: May 22 2018 16:22:08) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies $ php -n a.php int(-9223372036854775808) $ php -n b.php Fatal error: Default value for parameters with a integer type can only be integer or NULL in /home/sb/b.php on line 2 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76385&edit=1