PHP Decorator Pattern

index.php

<?php

$macbook = new Macbook();
echo 'Una Macbook con pantalla de 13 pulgadas cuesta ' . $macbook->getPrice() . ' euros' . PHP_EOL;

$macbook15Pulg = new WithDisplaySize15(new Macbook());
echo 'Una Macbook con pantalla de 15 pulgadas cuesta ' . $macbook15Pulg->getPrice() . ' euros' . PHP_EOL;

$macbook17Pulg = new WithDisplaySize17(new Macbook());
echo 'Una Macbook con pantalla de 17 pulgadas cuesta ' . $macbook17Pulg->getPrice() . ' euros' . PHP_EOL;

$macbookPro = new MacbookPro(new Macbook());
echo 'Una Macbook Pro con pantalla de 13 pulgadas cuesta ' . $macbookPro->getPrice() . ' euros' . PHP_EOL;

$macbookPro15Pulg = new WithDisplaySize15(new MacbookPro(new Macbook()));
echo 'Una Macbook Pro con pantalla de 15 pulgadas cuesta' . $macbookPro15Pulg->getPrice() . ' euros' . PHP_EOL;

$macbookPro17Pulg = new WithDisplaySize17(new MacbookPro(new Macbook()));
echo 'Una Macbook Pro con patanlla de 17 pulgadas cuesta ' . $macbookPro17Pulg->getPrice() . ' euros' . PHP_EOL;

Macbook.php

<?php
class Macbook
{
    protected $basePrice = 1500;
    
    public function getPrice()
    {
        return $this->basePrice;
    }
}

MacbookDecorator.php

<?php
abstract class MacbookDecorator
{
    protected $price;
    protected $macbook;

    public function __construct($macbook)
    {
        $this->macbook = $macbook;
    }
    public function getPrice()
    {
        return $this->macbook->getPrice() + $this->price;
    }
}

MacbookPro.php

<?php
class MacbookPro extends MacbookDecorator 
{ 
  protected $price = 950; 
}

WithDisplaySize15.php

<?php
class WithDisplaySize15 extends MacbookDecorator 
{ 
  protected $price = 350; 
}

WithDisplaySize17.php

<?php
class WithDisplaySize17 extends MacbookDecorator 
{ 
  protected $price = 700; 
}