I have the following ocde that blocks any user from seeing post before the date they subscribe.

I would like to change it so that the user can see any future posts and any that have been made 30 days before.

I can not work this out/make it owrk. Any ideas?

public function should_protect_older_post($output, $id) {
        $auth = SwpmAuth::get_instance();
        $perms = SwpmPermission::get_instance($auth->get('membership_level'));
        $protect_older_posts = $perms->get('protect_older_posts');
        $post = get_post($id);
        return (!empty($protect_older_posts) && (strtotime($post->post_date) < strtotime($auth->get('subscription_starts'))));
````your text`