Bug #52900 [Bgs]: Protected instance method called by static method of the same class
| From: | cataphract@php.net | Date: | Tue, 21 Sep 2010 19:58:09 +0000 |
| Subject: | Bug #52900 [Bgs]: Protected instance method called by static method of the same class | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-154542@lists.php.net to get a copy of this message | ||
Edit report at http://bugs.php.net/bug.php?id=52900&edit=1
ID: 52900
Updated by: cataphract@php.net
Reported by: e dot visciola at xaos dot it
Summary: Protected instance method called by static method of
the same class
Status: Bogus
Type: Bug
Package: Class/Object related
Operating System: WIN & OSX
PHP Version: Irrelevant
Block user comment: N
New Comment:
Java actually has more complicated semantics for protected: see
http://java.sun.com/docs/books/jls/third_edition/html/names.html#6.6.2
:
A protected member or constructor of an object may be accessed from
outside the package in which it is declared only by code that is
responsible for the implementation of that object. [Inside the same
package, access is permitted]
6.6.2.1 Access to a protected Member
Let C be the class in which a protected member m is declared. Access is
permitted only within the body of a subclass S of C. In addition, if Id
denotes an instance field or instance method, then:
* If the access is by a qualified name Q.Id, where Q is an
ExpressionName, then the access is permitted if and only if the type of
the expression Q is S or a subclass of S.
* If the access is by a field access expression E.Id, where E is a
Primary expression, or by a method invocation expression E.Id(. . .),
where E is a Primary expression, then the access is permitted if and
only if the type of E is S or a subclass of S.
Previous Comments:
------------------------------------------------------------------------
[2010-09-21 17:43:54] e dot visciola at xaos dot it
OK, thanks...
I try also in Java and the behaviour is the same.
I'm sorry to have submit it.
Good work
------------------------------------------------------------------------
[2010-09-21 17:09:13] cataphract@php.net
Not a bug.
Inside the static method, the calling scope is A. The scope of
instanceMethod is also A.
Protected methods are accessible whenever their scope and the calling
scope are in the same class hierarchy.
------------------------------------------------------------------------
[2010-09-21 16:02:01] e dot visciola at xaos dot it
Description:
------------
When I call a protected instance method of an object inside a class
method of "the same type" I'd like to have an error.
The example explain:
Test script:
---------------
class A {
protected function instanceMethod()
{
echo 'Instance method called, but it is not right because instance
method is protected<br />';
}
public static function staticMethod()
{
echo 'Static method called<br />';
$a = new A();
$a->instanceMethod();
}
}
A::staticMethod();
Expected result:
----------------
That was generated an error to access the protected method
Actual result:
--------------
Static method called
Instance method called, but it is not right because instance method is
protected
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=52900&edit=1