#34157 [Opn->Bgs]: Abstract methods in interfaces break class-relations

ID: 34157 Updated by: tony2001@php.net Reported By: jami dot pekkanen at ateco dot fi -Status: Open +Status: Bogus Bug Type: Class/Object related Operating System: Linux PHP Version: 5.0.4 New Comment: Actually it has nothing to do with methods, abstract etc. You get the result you get because 'BrokenImplementor' doesn't have parent classes at all, so it can't be a "subclass" of another class/interface. But 'WorkingImplementor' is a subclass of class that implements the interface, so it works in this case. Anyway, you should use 'instanceof' operator instead - it'd work in both cases, as it operates differently. Previous Comments: ------------------------------------------------------------------------ [2005-08-16 21:07:58] jami dot pekkanen at ateco dot fi Description: ------------ If interface contains abstract method, direct implementor isn't reported as subclass of the interface. However, if one has abstract class in the inheritance hierarchy, implementing classes are reported as subclasses of the interface. Should abstract methods in interfaces even exist? Reproduce code: --------------- <?php interface SomeInterface { abstract public function Foo(); } class BrokenImplementor implements SomeInterface { public function Foo() {} } abstract class DummyParent implements SomeInterface {} class WorkingImplementor extends DummyParent { public function Foo() {} } var_dump(is_subclass_of('WorkingImplementor', 'SomeInterface')); var_dump(is_subclass_of('BrokenImplementor', 'SomeInterface')); ?> Expected result: ---------------- bool(true) bool(true) Actual result: -------------- bool(true) bool(false) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=34157&edit=1