---
title: "Extending the TCA array"
manual: "TYPO3 Explained"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3coreapi:extending-tca@main"
source: "ExtensionArchitecture/HowTo/ExtendingTca/Index.rst"
rendered: "2026-09-19T06:56:03+00:00"
---

# Extending the TCA array {#extending-tca}

Being a PHP array, the Table Configuration Array can be easily
extended. It can be accessed as the global variable `$GLOBALS['TCA']`.
TYPO3 also provides APIs for making this simpler.

-   [Storing modifications](https://docs.typo3.org/permalink/t3coreapi:storing-modifications@main)
-   [Customization examples](https://docs.typo3.org/permalink/t3coreapi:customization-examples@main)
-   [Verifying the TCA](https://docs.typo3.org/permalink/t3coreapi:verifying-the-tca@main)