more simple an concise example of AbstractFactory

Creational/AbstractFactory/ProductFactory.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace DesignPatterns\Creational\AbstractFactory;
+
+class ProductFactory
+{
+    const SHIPPING_COSTS = 50;
+
+    public function createShippableProduct(int $price): Product
+    {
+        return new ShippableProduct($price, self::SHIPPING_COSTS);
+    }
+
+    public function createDigitalProduct(int $price): Product
+    {
+        return new DigitalProduct($price);
+    }
+}