'localhost', 'db_name' => 'my_database', 'db_user' => 'my_username', 'db_pass' => 'my_password' ]; $all_settings = getAll($config); print_r($all_settings); ?>In this example, we create a configuration array with several settings, including the database connection details. We then pass this array to the `getAll()` method, which returns all the key-value pairs from the configuration. The `getAll()` method is commonly used in PHP frameworks and libraries, such as Laravel, Symfony, and CakePHP. It is also available in many PHP extensions and libraries, including the `Config` package.