Чек-лист по безопасности для веб-разработчика
https://github.com/minotaura/ru-web-developer-security-checklist
https://oncebot.github.io/popbox.js/
$bob = User::where('username', 'john')->first();
$alice = User::where('username', 'alice')->first();
User::filterFollowingsOf($bob)->get(); // You will get no results.
User::filterUnfollowingsOf($bob)->get(); // You will get Alice.
$bob->follow($alice);
User::filterFollowingsOf($bob)->get(); // You will get Alice as result.