> For the complete documentation index, see [llms.txt](https://drupal.bermaki.com/drupal-documentation-and-guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend.md).

# Backend

- [Helpful Drupal Classes and Methods](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/helpful-drupal-classes-and-methods.md): These are some of the Drupal core classes and their methods that help me in my day to day work.
- [Entities](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/entities.md): Entities are the main building blocks of Drupal. They are the objects that are stored in the database. For example, a node is an entity, a user is an entity, a taxonomy term is an entity, etc.
- [Nodes](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/nodes.md): Nodes are the main content type in Drupal. It's the most common entity that we use in Drupal.
- [Taxonomies](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/taxonomies.md): Taxonomies are the main way to categorize content in Drupal.
- [Hooks](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/hooks.md): In Drupal, hooks are the main way to interact with the Drupal core.
- [Twig](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/twig.md): Twig is a template engine for PHP. It is used by Drupal to render HTML pages.
- [Libraries](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/libraries.md): Libraries are a way to group and manage JavaScript, CSS, and other assets.
- [Queries](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/queries.md)
- [Forms](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/forms.md)
- [Files & Images](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/files-and-images.md): Example of how we work with files and images in Drupal 8/9.
- [Helpful functions and solutions](https://drupal.bermaki.com/drupal-documentation-and-guides/spanish/backend/helpful-functions-and-solutions.md): These are some helpful functions and solutions to issues i've encountered while developing.