name : ContainerInterface.php <?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; }