Edit report at https://bugs.php.net/bug.php?id=43200&edit=1
ID: 43200
Updated by: lsm...@php.net
Reported by: smith at pooteeweet dot org
Summary: Interface implementation / inheritence not possible
in abstract classes
Status: Open
Type: Bug
Package: Scripting Engine problem
Operating System: Linux
PHP Version: 5.3CVS-2007-11-05 (CVS)
Block user comment: N
Private report: N
New Comment:
I should also clarify that the issue also exist when simply dealing with
interfaces only aka when an interface extends another interface. I am aware
that
we do not support polymorphism, but again when dealing with legacy interfaces
there will be overlaps with signatures that are identical.
Previous Comments:
------------------------------------------------------------------------
[2011-10-02 21:16:11] ahar...@php.net
Revert the various field changes that crept in. I'll let one of the engine
developers figure out if this should be left open or re-bogused.
------------------------------------------------------------------------
[2011-10-01 07:55:33] lsm...@php.net
This is not bogus and it should be fixed. In many cases I in the end managed to
work around this, but its not always possible, like when dealing with legacy
interfaces that one cannot change etc, but that are being superseded by newer
ones (f.e. https://github.com/symfony/symfony/pull/2244).
------------------------------------------------------------------------
[2010-12-16 00:38:40] kucho86 at gmail dot com
Are you planning to cover this bug??
It's pretty simple to fix and since interfaces define behaviours and classes
implements them, this should be possible.
It goes against Object Oriented Programming concepts.
------------------------------------------------------------------------
[2007-11-05 16:34:21] cel...@php.net
<?php
interface A {
function foo();
}
abstract class B implements A {
}
class C extends B {
public function foo() {
echo 'works';
}
}
$o = new C();
$o->foo();
?>
If you don't want to implement a method from an interface, don't
redeclare it, and the code will work as intended.
------------------------------------------------------------------------
[2007-11-05 15:50:30] smith at pooteeweet dot org
Description:
------------
PHP 5.3.0-dev (cli) (built: Nov 5 2007 16:42:56) from todays CVS HEAD.
The implementation of interfaces in concrete abstract classes and their
inheritence is not possible:
Reproduce code:
---------------
<?php
interface A {
function foo();
}
abstract class B implements A {
abstract public function foo();
}
class C extends B {
public function foo() {
echo 'works';
}
}
$o = new C();
$o->foo();
?>
Expected result:
----------------
Echoing "works"
Actual result:
--------------
Fatal error: Can't inherit abstract function A::foo() (previously declared
abstract in B) in ...
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=43200&edit=1
