#44590 [Opn->Bgs]: strange behavior of visibility
| From: | vituko at gmail dot com | Date: | Tue, 01 Apr 2008 18:06:27 +0000 |
| Subject: | #44590 [Opn->Bgs]: strange behavior of visibility | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-123830@lists.php.net to get a copy of this message | ||
ID: 44590
User updated by: vituko at gmail dot com
Reported By: vituko at gmail dot com
-Status: Open
+Status: Bogus
Bug Type: Class/Object related
Operating System: Debian GNU/Linux
PHP Version: 5.3CVS-2008-04-01 (CVS)
New Comment:
Sorry, this report is bogus.
I misunderstood the results I got.
Previous Comments:
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[2008-04-01 16:32:36] vituko at gmail dot com
The situation with methods is easier : one private method (static or
not) can exclusively be accessed from the same context (class body)
where it was declared.
I think it is more powerfull the other way : when a class declares a
method should can invoque it on an object of an inherited class.
------------------------------------------------------------------------
[2008-04-01 12:19:50] vituko at gmail dot com
Description:
------------
Context visibility of inherited private attributes when they apply
to child classes.
When a private attribtue is inherited, it's still accessible from
the context (base class) where it was declared and it becomes
accessible from the child context (unidirectional visibility).
But when this attribute is static (class attribute), it becomes
inaccessible from every context : the base class and the child
class.
I don't know if it's the normal behavior, anyway I find it strange
and it could be documented.
Thanks
Reproduce code:
---------------
class a {
private $v ;
private static $w ;
function f($c) {
$c -> v = 'asdf' ;
$c :: $w = 'fdsa' ;
}
}
class b extends a {
function g($c) {
$c -> v = 'asdf' ;
$c :: $w = 'fdsa' ;
}
}
$a = new a() ;
$b = new b() ;
$a-> f($a) ;
$a-> f($b) ;
$b -> f($b) ;
$b -> g($b) ;
Expected result:
----------------
no errors
Actual result:
--------------
A - protected static $w ;
all is ok
B - private static $w ;
1 : $a-> f($a) ; -> ok
2 : $a-> f($b) ; -> Cannot access property b::$w
3 : $b -> f($b) ; -> Cannot access property b::$w
4 : $b -> g($b) ; -> Cannot access property b::$w
2,3,4 : b:$w is accessible from nowhere.
The errors are not :
- Access to undeclared static property
- Cannot access private property
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=44590&edit=1