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function($object){ ... }

fn($post) => $post->id

function($object) use ($parameter) {...}

interfaces that define the core services provided by the framework

group associated request handling logic within a single class

design pattern that allows the removal of hard-coded dependencies and makes it possible to change them, whether at run-time or compile-time

design pattern that provides a simplified (but limited) interface to a complex system of classes, library or framework

$array['value'] ?? $default_value

is the object that lets all service providers register themselves and their dependencies

is a package with specific functionality that boots with your Laravel application

ensures that a class has only one instance, while providing a global access point to this instance.

$condition ? $if_true : $if_false