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<?php
declare(strict_types=1);
namespace Yiisoft\Factory\Definition;
use Yiisoft\Factory\Exception\InvalidConfigException;
use Yiisoft\Factory\DependencyResolverInterface;
use function is_string;
/**
* The `Reference` defines a dependency to a service in the container or factory in another service definition.
* For example:
*
* ```php
* [
* InterfaceA::class => ConcreteA::class,
* 'alternativeForA' => ConcreteB::class,
* MyService::class => [
* '__construct()' => [
* Reference::to('alternativeForA'),
* ],
* ]
* ```
*/
final class Reference implements ReferenceInterface
{
private string $id;
private function __construct(string $id)
$this->id = $id;
}
* @throws InvalidConfigException If ID is not string.
public static function to($id): self
if (!is_string($id)) {
throw new InvalidConfigException('Reference ID must be string.');
return new self($id);
public function resolve(DependencyResolverInterface $container)
return $container->resolveReference($this->id);
yiisoft /
factory
