# Advanced

- [Middleware](/v1.5/advanced/middleware.md)
- [Validation](/v1.5/advanced/validation.md)
- [Creating Packages](/v1.5/advanced/creating-packages.md)
- [Extending Classes](/v1.5/advanced/extending-classes.md)
- [Creating a Mail Driver](/v1.5/advanced/creating-a-mail-driver.md)
- [Sessions](/v1.5/advanced/sessions.md)