static void spl_filesystem_tree_it_move_forward(zend_object_iterator *iter)
{
	spl_filesystem_iterator *iterator = (spl_filesystem_iterator *)iter;
	spl_filesystem_object   *object   = spl_filesystem_iterator_to_object(iterator);

	object->u.dir.index++;
	do {
		spl_filesystem_dir_read(object);
	} while (spl_filesystem_is_dot(object->u.dir.entry.d_name));
	if (object->file_name) {
		efree(object->file_name);
		object->file_name = NULL;
	}
	if (!Z_ISUNDEF(iterator->current)) {
		zval_ptr_dtor(&iterator->current);
		ZVAL_UNDEF(&iterator->current);
	}
}
Unknown