How to get the object associated with the current key while iterating through SplObjectStorage in PHP 5.4

Do it:

$storage = new SplObjectStorage;
$foo = (object)['foo' => 'bar'];
$storage->attach($foo, ['room' => 'bar']);

foreach ($storage as $value) {
    $obj = $storage->current(); // current object
    $assoc_key  = $storage->getInfo(); // return, if exists, associated with cur. obj. data; else NULL

    var_dump($obj);
    var_dump($assoc_key);
}

See more SplObjectStorage::current and SplObjectStorage::getInfo.