[PHP-INTERNALS] Destructor best practice?

There appear to be two different ways that I can free an internal
structure when dealing with classes. The first is to declare a
'zend_objects_destroy_object' handler:

...
    retval.handle = zend_objects_store_put(intern,
(zend_objects_store_dtor_t) zend_objects_destroy_object,
my_free_function_callback, NULL TSRMLS_CC);

    retval.handlers = zend_get_std_object_handlers();
...

In which 'my_free_function_callback' is the callback that frees
underlying structure information. The alternative is to use __destruct:

PHP_METHOD(my_class, __destruct)
{
}

...

static const zend_function_entry my_class_methods[] = {
...
  PHP_ME(my_class, __destruct, NULL, ZEND_ACC_PUBLIC | ZEND_ACC_DTOR)
...
};


Which is considered best-practice? I'm leaning toward the latter, but
want to make sure there aren't any issues with relying on the __destruct
approach.