How laravel `Auth:user()` or `Auth:id()` works

Here's my attempt at figuring out what actually happens on an Auth::user() call:

Auth::user()Illuminate\Support\Facades\Authextends Illuminate\Support\Facades\FacadeFacade::__callStatic('user')static::getFacadeRoot()resolveFacadeInstance(static::getFacadeAccessor == 'auth' (from Auth class))return static::$app[$name];static::$app is instance of Illuminate\Foundation\Applicationextends Illuminate\Container\Container

which implements ArrayAccess (which is why $obj[] syntax works)

Container::offsetGet(auth)Application::make(auth) Container::getAlias(auth) return 'auth'Container::make(auth)Container::resolve(auth)

yadda, yadda, yaddaSee in Application::registerCoreContainerAliases

'auth' = Illuminate\Auth\AuthManagerAuthManager::user() = AuthManager::__call = $this->guard()->user()AuthManager::guard(web)AuthManager::resolve(web) (see config/auth.php)AuthManager::createSessionDriver() returns new Illuminate\Auth\SessionGuardSessionGuard::user() // <---- this is what actually get's called, based on default config

Did you read this? Its a good guide to start with

https://laravel.com/docs/5.4/authentication

laravel uses session for authentication.if you are beginer in laravel then must read following link:

https://laravel.com/docs/5.4/authentication

i think its help you