1.2. Simple Factory¶

1<?php
2
3interface Product {
4    public function getName(): string;
5    public function getPrice(): int;
6    public function getDescription(): string;
7}

 1<?php
 2
 3class Book implements Product {
 4    public function __construct(
 5        private readonly string $name,
 6        private readonly int    $price,
 7        private readonly string $description
 8    ) {
 9    }
10
11    public function getName(): string {
12        return $this->name;
13    }
14
15    public function getPrice(): int {
16        return $this->price;
17    }
18
19    public function getDescription(): string {
20        return $this->description;
21    }
22}
23
24class Clothing implements Product {
25    public function __construct(
26        private readonly string $name,
27        private readonly int    $price,
28        private readonly string $description
29    ) {
30    }
31
32    public function getName(): string {
33        return $this->name;
34    }
35
36    public function getPrice(): int {
37        return $this->price;
38    }
39
40    public function getDescription(): string {
41        return $this->description;
42    }
43}
44
45class Electronics implements Product {
46    public function __construct(
47        private readonly string $name,
48        private readonly int    $price,
49        private readonly string $description
50    ) {
51    }
52
53    public function getName(): string {
54        return $this->name;
55    }
56
57    public function getPrice(): int {
58        return $this->price;
59    }
60
61    public function getDescription(): string {
62        return $this->description;
63    }
64}

 1<?php
 2
 3class ProductFactory
 4{
 5    /**
 6     * @throws Exception
 7     */
 8    public function createProduct(string $type, string $name, int $price, string $description): Product
 9    {
10        if ($type == "book") {
11            return new Book($name, $price, $description);
12        } else if ($type == "clothing") {
13            return new Clothing($name, $price, $description);
14        } else if ($type == "electronics") {
15            return new Electronics($name, $price, $description);
16        } else {
17            throw new Exception("Invalid product type.");
18        }
19    }
20}

1$productFactory = new ProductFactory();
2$product = $productFactory->createProduct("book", "The Lord of the Rings", 20.99, "A classic fantasy novel.");
3echo $product->getName() . "<br>";
4echo $product->getPrice() . "<br>";
5echo $product->getDescription() . "<br>";