Online PHP editor | output for MhPOH

<?php class Container { private array $factories = []; public function addFactory(string $className, Factory $factory): void { $this->factories[$className] = $factory; } public function getInstance(string $className): object { return $this->factories[$className]->create(); } } abstract class Factory { private Container $container; private array $config = []; public function __construct(Container $container, array $config = []) { $this->container = $container; $instanceConfig = array_key_exists(static::getClass(), $config) ? $config[static::getClass()] : []; $this->config = $instanceConfig; } abstract public static function getClass(): string; public function create(): object { $class = static::getClass(); $parameters = []; foreach($this->config['parameters'] as $name => $value) { if (null === $value) { $value = $this->container->getInstance($name); } $parameters[] = $value; } return new $class(...$parameters); } } class FooFactory extends Factory { public static function getClass(): string { return Foo::class; } } class BarFactory extends Factory { public static function getClass(): string { return Bar::class; } } class Foo { private Bar $bar; private string $test; public function __construct(Bar $bar, string $test) { $this->bar = $bar; $this->test = $test; } } class Bar {} $config = [ Foo::class => [ 'parameters' => [ Bar::class => null, 'test', ] ], Bar::class => [ 'parameters' => [], ], ]; $container = new Container; $container->addFactory(FooFactory::getClass(), new FooFactory($container, $config)); $container->addFactory(BarFactory::getClass(), new BarFactory($container, $config)); $foo = $container->getInstance(Foo::class); var_dump($container); var_dump($foo);