<?php

declare(strict_types=1);

namespace Psr\Container;

/**

* Describes the interface of a container that exposes methods to read its entries.

*/

interface ContainerInterface

{

/**

* Finds an entry of the container by its identifier and returns it.

*

* @param string $id Identifier of the entry to look for.

*

* @throws NotFoundExceptionInterface No entry was found for **this** identifier.

* @throws ContainerExceptionInterface Error while retrieving the entry.

*

* @return mixed Entry.

*/

public function get(string $id);

/**

* Returns true if the container can return an entry for the given identifier.

* Returns false otherwise.

*

* `has($id)` returning true does not mean that `get($id)` will not throw an exception.

* It does however mean that `get($id)` will not throw a `NotFoundExceptionInterface`.

*

* @param string $id Identifier of the entry to look for.

*

* @return bool

*/

public function has(string $id): bool;

}