Laracasts Download Patched | Object-oriented Principles In Php

class Circle extends Shape public function area($radius) return pi() * pow($radius, 2);

// We "compose" the User by passing in a Role object public function __construct(Role $role) $this->role = $role;

public function getBalance() return $this->balance; object-oriented principles in php laracasts download

Encapsulation is the practice of hiding the internal state and behavior of an object, exposing only what is necessary through a public interface. This is achieved using access modifiers: public , protected , and private . Accessible from anywhere.

Clients should not be forced to depend on interfaces they do not use. It is better to have many small, specific interfaces than one large, general-purpose interface. Clients should not be forced to depend on

Abstraction hides complex implementation details and only shows the essential features of an object. In PHP, this is achieved using abstract classes and interfaces. Interfaces define what a class should do, while the class itself decides how to do it. 2. Advanced OOP Concepts Highlighted in Laravel

public function getBalance(): float

interface PaymentProcessor public function charge(float $amount): void; class StripeProcessor implements PaymentProcessor public function charge(float $amount): void // Stripe API logic class PayPalProcessor implements PaymentProcessor public function charge(float $amount): void // PayPal API logic // Both classes can be passed to this function interchangeably function checkout(PaymentProcessor $processor, float $total) $processor->charge($total); Use code with caution. Abstraction

A class is a template or a blueprint. It defines the structure and behavior that the objects created from it will have. Think of a class as the architectural drawing of a house. In PHP, this is achieved using abstract classes

: You can swap implementations without changing the UserService —perfect for testing or changing storage backends.

Abstraction is the practice of showing only the necessary information to the outside world while hiding the implementation details. In PHP, we can achieve abstraction using abstract classes and interfaces.