Bug #74188 [Com]: Null coalescing operator fails for undeclared static class properties & constant

Edit report at https://bugs.php.net/bug.php?id=74188&edit=1

 ID:                 74188
 Comment by:         pandenitz at mail dot ru
 Reported by:        pandenitz at mail dot ru
 Summary:            Null coalescing operator fails for undeclared static
                     class properties & constant
 Status:             Verified
 Type:               Bug
 Package:            Variables related
 Operating System:   Win 7 64
 PHP Version:        7.0.16
 Assigned To:        tpunt
 Block user comment: N
 Private report:     N

 New Comment:

We can use isset() for variables as well :) Why not to make it work with constants? Anyway, static class properties are more important.


Previous Comments:
------------------------------------------------------------------------
[2017-03-27 19:11:58] [email protected]

The null coalescing operator should not be used to check whether a constant has been defined or not - that's what the defined() function is for.

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[2017-03-27 08:10:43] pandenitz at mail dot ru

Same for class constants.

------------------------------------------------------------------------
[2017-03-01 17:05:48] pandenitz at mail dot ru

I guess it's same in PHP 7.1

------------------------------------------------------------------------
[2017-03-01 07:42:17] pandenitz at mail dot ru

Description:
------------
Null coalescing operator doesn't check isset() for static properties

Test script:
---------------
abstract class Test
{
	public static function get()
	{
		return static::$test ?? true;
	}

	public static function get2()
	{
		return isset(static::$test) ? static::$test : true;
	}
}

// Access to undeclared static property
Test::get();

// Works
Test::get2();


Expected result:
----------------
No errors

Actual result:
--------------
Error


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



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Edit this bug report at https://bugs.php.net/bug.php?id=74188&edit=1