Bug #80283 [Com]: Null constant in method signature did not allow nullable anymore

From: Date: Mon, 26 Oct 2020 08:59:03 +0000
Subject: Bug #80283 [Com]: Null constant in method signature did not allow nullable anymore
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-229922@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=80283&edit=1

 ID:                 80283
 Comment by:         php at kriegt dot es
 Reported by:        php-bugs at marcelthole dot de
 Summary:            Null constant in method signature did not allow
                     nullable anymore
 Status:             Not a bug
 Type:               Bug
 Package:            *General Issues
 PHP Version:        8.0.0RC2
 Block user comment: N
 Private report:     N

 New Comment:

Is that intentional behavior documented in one of the breaking changes messages?
Not sure if I've ever seen anything regarding this behavior.


Previous Comments:
------------------------------------------------------------------------
[2020-10-26 08:43:37] nikic@php.net

This is an intentional change, documented here: https://github.com/php/php-src/blob/0535872b7cd50be8b40ad06154b287749315eb27/UPGRADING#L97-L106

------------------------------------------------------------------------
[2020-10-26 08:40:40] php-bugs at marcelthole dot de

Description:
------------
In PHP < 8.0 it was possible to make an argument nullable without the question mark if the
default value is null. This works fine if the variable is directly null, but not when the default
value is an CONST with a null value

Test script:
---------------
<?php

declare(strict_types=1);

const ALLOW_ANY = null;

var_dump(ALLOW_ANY);

function foo(array $baz = ALLOW_ANY)
{
    return true;
}

var_dump(foo(NULL));

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

Actual result:
--------------
NULL

Fatal error: Uncaught TypeError: foo(): Argument #1 ($baz) must be of type array, null given, called
in /in/RLUo7 on line 14 and defined in /in/RLUo7:9
Stack trace:
#0 /in/RLUo7(14): foo(NULL)
#1 {main}
  thrown in /in/RLUo7 on line 9

Process exited with code 255.


------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=80283&edit=1

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