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Request #52648 interface/class
Submitted: 2010-08-19 23:48 UTC Modified: 2010-08-20 17:53 UTC
From: augusteiner at hotmail dot com Assigned:
Status: Not a bug Package: Class/Object related
PHP Version: Irrelevant OS: Windows
Private report: No CVE-ID: None
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From: augusteiner at hotmail dot com
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 [2010-08-19 23:48 UTC] augusteiner at hotmail dot com
A class that implements an interface should implement interface's methods, but a method inside that class with type hint of class that implements the interface would be accepted. Or not!?

After all, both are hierarchically identical.

Test script:
interface IEntity
    public function equals(IEntity $other);

class Entity implements IEntity
    public function equals(Entity $other)
        return $this === $other;

Actual result:
Fatal error: Declaration of Entity::equals() must be compatible with that of IEntity::equals() in C:\wamp\www\horusweb\models\Coded.class.php


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 [2010-08-20 07:11 UTC]
-Status: Open +Status: Bogus
 [2010-08-20 07:11 UTC]
This is by design. In your example, Entity::equals() is more restrictive than IEntity::equals(): it wouldn't accept another class that implemented IEntity independently of Entity, even though the interface explicitly allows that.
 [2010-08-20 17:53 UTC] augusteiner at hotmail dot com
But if instead of an interface it was an abstract class with Equals marked as 

This situation could not be compatible with my first description!?
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