The configuration service provider provides a framework for managing application configuration within a Silex application. If you do not know what Silex is, it is a PHP micro-framework created by the makers of Symfony. You can find out more about Silex here. It can support an unlimited number of configuration sources and supports configuration cascading based on the order in which you define your configuration sources. It comes shipped with 3 parsers:

• A Yaml file parser (with support for import declarations)
• An environment variable parser
• An array flatten parser