Fetching same object instance

[heruan]

Two instances of the same object (i.e. $obj1 === $obj2) if stored and then fetched from cache should be the same instance again.

class A {}
$obj1 = new A();
$obj2 = $obj1;
var_dump($obj1 === $obj2); // true
apcu_store('obj1', $obj1);
apcu_store('obj2', $obj2);
var_dump(apcu_fetch('obj1') === apcu_fetch('obj2')); // false, but should be true

Semi-real use case:

class User {}
class Post {
    public $createdBy;
    public $editedBy;
}
$user = new User();
$post = new Post();
$post->createdBy = $user;
$post->editedBy = $user;
// persist $post to DB
// ...
// hydrate $post from DB and cache it
apcu_store('post', $post);
// ...
// fetch $post from cache
$post = apcu_fetch('post');
// now $post->createdBy and $post->editedBy are two different instances of class User, but they should be the same instance as the original

[krakjoe]

You do not store the same physical object in the cache, that doesn't make any sense ...