silverstripe-framework/docs/en/02_Developer_Guides/04_Configuration/03_Environment_Variables.md

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title: Environment Variables
summary: Site configuration variables such as database connection details, environment type and remote login information.
# Environment Variables
Environment specific variables like database connection details, API keys and other server configuration should be kept
outside the application code in a separate `.env` file. This file is stored in the web root and
kept out of version control for security reasons.
For more information see our docs on [Environment Management](../../getting_started/environment_management/).
Data which isn't sensitive that can be in version control but is mostly static such as constants is best suited to be
included through the [Configuration API](configuration) based on the standard environment types (dev / test / live).
## Related Lessons
* [Up and running](https://www.silverstripe.org/learn/lessons/v4/up-and-running-setting-up-a-local-silverstripe-dev-environment-1)
* [Advanced environment configuration](https://www.silverstripe.org/learn/lessons/v4/advanced-environment-configuration-1)