.. _extensions:

=============================
Developing & Using Extensions
=============================

Extension Development
=====================

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            .. rubric:: Getting started with extension development

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            *  :ref:`Introduction to extensions in TYPO3
               <t3coreapi:extension-architecture-introduction>`

            *  Extension :ref:`t3coreapi:extension-files-locations`

            *  :ref:`t3coreapi:extension-naming` and :ref:`t3coreapi:cgl`


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            .. rubric:: TYPO3 Explained - API Quicklinks

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            *  :ref:`QueryBuilder <t3coreapi:database-query-builder>` based on Doctrine
            *  :ref:`t3coreapi:DependencyInjection`
            *  :ref:`t3coreapi:request-handling`

Extension Manuals
=================

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            .. rubric:: System Extensions

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            Here you can find documentation of system extensions and third-party extensions,
            if available.

            System extensions are shipped with the TYPO3 core. A list of all available
            system extension documentation is found in the
            :ref:`system extensions section <System-Extensions>`.


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            .. rubric:: Third-party extensions

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            Third-party extensions are available through the
            TYPO3 Extension Repository (TER) or via composer.

            Go to the `TYPO3 Extension Repository (TER) <https://extensions.typo3.org/>`__ to search
            for documentation of third-party extensions.

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            .. rubric:: Document an extension

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            Documentation is an essential part of an extension.
            Learn :ref:`how to document <h2document:how-to-start-docs-extension>` an extension
            and :ref:`publish the documentation <h2document:register-for-rendering>` on docs.typo3.org.



.. toctree::
   :hidden:

   Extension Development Basics <https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ExtensionArchitecture/Index.html>
   SystemExtensions
   Third-party extensions <https://extensions.typo3.org/>
   Document an extension <https://docs.typo3.org/m/typo3/docs-how-to-document/main/en-us/WritingDocForExtension/Index.html>