name : EnvInterface.php <?php /* * This file is part of Psy Shell. * * (c) 2012-2023 Justin Hileman * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Psy; /** * Abstraction around environment variables. */ interface EnvInterface { /** * Get an environment variable by name. * * @return string|null */ public function get(string $key); }