<?php
/**
* Interface used to provider access to a particular configuration for the Configuration_Loader.
*
* @since 5.1.3
*
* @package TEC\Common\Configuration;
*/
namespace TEC\Common\Configuration;
/**
* Interface Configuration_Provider_Interface.
*
* @since 5.1.3
*
* @package TEC\Common\Configuration;
*/
interface Configuration_Provider_Interface {
/**
* Whether a particular variable is defined or not.
*
* @since 5.1.3
*
* @param $key string Variable name.
*
* @return bool Whether the variable is defined or not.
*/
public function has( string $key ): bool;
/**
* Retrieves the value for the given variable.
*
* @since 5.1.3
*
* @param $key string Variable name.
*
* @return null|mixed
*/
public function get( string $key );
/**
* Retrieve all variables defined in an associative array.
*
* @since 5.1.3
*
* @return array All vars.
*/
public function all(): array;
}