typo3-extension-workshop/Documentation/source/StartNewExtension.rst

Start new extension

Necessary files

The only necessary file is ext_emconf.php. This configures the Extension Manager. Without this file, the Extension Manager would not recognize the extension and would prevent installation.

../../CodeExamples/localPackages/example_extension/ext_emconf.php

See t3coreapi:extension-declaration in TYPO3 Core API Reference.

Task

So let's create a new folder and add the file.

Install extension

Once we have created the first extension, we need to install the extension. There are two ways for a local extension. Either placing the extension inside the installation, or via composer.

Task

Install the new extension.

Oldschool

Copy the extension to typo3conf/ext/, and head over to Extension Manager to activate the extension.

Via Composer

The following project setup is suggested:

.
├── composer.json
└── localPackages
    └── example_extension

composer.json:

../../CodeExamples/composer.json

In this case, we also need a composer.json inside our extension, to make the extension an composer package and allow the installation:

composer.json:

../../CodeExamples/localPackages/example_extension/composer.json

Thanks due typo3-console/composer-auto-commands our extension is activated already.