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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\di\dependencies;
use Psr\Container\ContainerInterface;
use yii\di\Container;
use yii\di\contracts\DependencyInterface;
* Reference points to a service name in the container
class NamedDependency implements DependencyInterface
{
private $id;
private $optional;
* Constructor.
* @param string $id the component ID
public function __construct(string $id, bool $optional)
$this->id = $id;
$this->optional = $optional;
}
public static function to(string $id)
return new self($id, false);
public function resolve(ContainerInterface $container)
try {
$result = $container->get($this->id);
} catch (\Throwable $t) {
if ($this->optional) {
return null;
throw $t;
return $result;
yiisoft /
di
