> For the complete documentation index, see [llms.txt](https://docs.phptravels.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.phptravels.com/support/for-developers.md).

# For Developers

- [Routing System](https://docs.phptravels.com/support/for-developers/routing-system.md)
- [Database Architecture](https://docs.phptravels.com/support/for-developers/database-architecture.md)
- [API Version 9](https://docs.phptravels.com/support/for-developers/api-version-9.md): PHPTARVELS API Docs
- [Adding Payment Gateway](https://docs.phptravels.com/support/for-developers/adding-payment-gateway.md)