<?php class Config {    public static $factory = 1;} interface Product {    public function getName();} abstract class AbstractFactory {     public static function getFactory() {        switch (Config::$factory) {            case 1:                return new FirstFactory();            case 2:                return new SecondFactory();        }        throw new Exception(‘Bad config‘);    }     abstract public function getProduct();} class FirstFactory extends AbstractFactory {    public function getProduct() {        return new FirstProduct();    }}class FirstProduct implements Product {    public function getName() {        return ‘The product from the first factory‘;    }} class SecondFactory extends AbstractFactory {    public function getProduct() {        return new SecondProduct();    }}class SecondProduct implements Product {    public function getName() {        return ‘The product from second factory‘;    }} $firstProduct = AbstractFactory::getFactory()->getProduct();Config::$factory = 2;$secondProduct = AbstractFactory::getFactory()->getProduct(); print_r($firstProduct->getName());// The first product from the first factoryprint_r($secondProduct->getName());// Second product from second factory