> For the complete documentation index, see [llms.txt](https://ampersandtarski.gitbook.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ampersandtarski.gitbook.io/documentation/configuring-your-application.md).

# Configuring your application

## Local Settings for the client-side application

The file localSettings.php contains code and switches to be used in the client-side application:

1. a switch `debug-mode` to switch debugging information on and off
2. code to switch different forms of logging on and off
3. the time zone used at run-time
4. a switch `display_errors` 
5. a time limit for running PHP.
6. a switch `productionEnv` to switch between development and production mode
7. database credentials for the application to log into the database
8. a switch loginEnabled to allow logging into the system
9. a variable `allowedRolesForImporter` to specify roles with access to the [Excel importer](/documentation/the-excel-importer.md).
10. run-time parameters for the [Exec engine](/documentation/architecture-of-an-ampersand-application/extensions/the-execengine.md).
11. run-time parameters for extensions such as OAuth.


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