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TYPO3 is an open source PHP based web content management system releasedunder the GNU GPL. TYPO3 is copyright © 1999-2025 by Kasper Skårhøj.

This document provides a basic introduction to TYPO3.

TYPO3 requires a web server with PHP and a database.The backend is accessed via a supported browser.

Please see theInstallation Guidein order to set up a basic TYPO3 installation on your web server.

TYPO3 is a free and open source Content Management Framework. It isreleased under the GNU General Public License. It can run on several webservers, such as Apache, nginx or IIS, on top of many operating systems,among them Linux, Microsoft Windows, FreeBSD or macOS.

TYPO3 was initially authored by Kasper Skårhøj and is now furtherdeveloped by a community of contributors and theTYPO3 Core DevelopmentTeam.

To get more info about the GPL license, visithttps://opensource.org/licenses/gpl-license

A Content Management Framework is more than just a content managementsystem, due to the separation of the streamlined core and optionalplugins (extensions). TYPO3 has an open API that allows you to extendthe frontend (website) and/or backend (administration) functionality.

The concept of extensions makes TYPO3 capable of being developed andused in almost any way you can imagine, either by using any of the manyextensions which are available for download, or by writing your own.

TYPO3 is based upon PHP and uses a database management system likeMySQL.

For more specific information regarding requirements see the fileINSTALL.md in this folder.

Here is an overview of the most important TYPO3 resources to help youget started:

• https://typo3.org/ is the main project website. It provides up-to-dateofficial news, information about events and the TYPO3 community.

• https://docs.typo3.org/: TYPO3 is one of the most thoroughlydocumented OpenSource products around, with manuals covering basictutorials, TypoScript, administration, development, core structure,etc. You should make the time to locate the various documents, andread those that apply to the work you want to do.

• https://get.typo3.org/ is the platform where you can download TYPO3and find all release notes and change logs of TYPO3 releases.

• https://extensions.typo3.org/ is the platform where you can search forand download TYPO3 extensions.

The TYPO3 community is using a tool called Slack to openly communicatewith each other and with the public. Several TYPO3 teams use Slack as away to communicate internally and most channels are a welcome place foryou to join and get yourself involved.

• Register:https://my.typo3.org/about-mytypo3org/slack
• Slack:https://typo3.slack.com/

Slack is nice for short discussions, but when asking questions, mostanswers are lost in the noise after a few minutes.

To let everyone profit from an answer, we recommend to ask questionson StackOverflow. If you like, you can then post a link into thecorresponding Slack channel to raise attention. And please, do notforget to tag your questions correctly withtypo3 (and possibly othertags liketypo3-9.5.x,Fluid orExtbase).

• StackOverflow questions tagged "TYPO3"

Visithttps://typo3.org/community/meet/

If you want to contribute to the TYPO3 source code, take a look at ourContributors Walkthrough and Review System:

• https://docs.typo3.org/core-contribution
• https://review.typo3.org/

Please use theTYPO3 Slack chat, if you need help insetting up your contribution environment. The community is veryhelpful and get you up and running! (Please post your questions inSlack Channel#typo3-cms-coredev regarding contribution support)

Therepository at GitHub is asynchronized mirror of the primary TYPO3 core git repository:

• https://git.typo3.org/typo3/typo3

If you want to file a bug report, take a look at:

• https://forge.typo3.org

If you learn about a potential security issue in the TYPO3 core or inan extension, please always contact the TYPO3 Security Team viasecurity@typo3.org.Please always include the version number where you've discovered the issue.If we can confirm a problem in a third-party extension, we will inform theauthor immediately.

If you discover a security problem in your own extension, please informthe TYPO3 Security Team as well. They can help you to fix it, and theymay want to issue an advisory once it is fixed.

For more details seeTYPO3 Security Team.

TYPO3 is said to be one of the most sophisticated PHP / Internet relatedapplications available, and the more you play with it, the more you willagree.

Due to the advanced level of the code and functionality, a degree ofstudy, time and perseverance is required to fully understand it, and getthe best from it. You should keep trying, as we say it's definitelyworth it. TYPO3 is the Enterprise Content Management System "for all".

The GPL license allows for developments that are based upon TYPO3 toalso be freely available under the GPL. Please remember this, becauseTYPO3 is about "Inspiring People To Share". If you are making money withTYPO3 you can donate or become a member of theTYPO3 Association.

By becoming a supporting member, individuals and organisations mainlyfund core development of TYPO3. The decision about what the funds areused for, is made by all members of the Association and the TYPO3Association Board. The decisions will be made transparent to the communityand especially the supporting members. Your funds will also serve forother purposes as laid out in the bylaws.

• Donate to TYPO3
• Become a member of the TYPO3 Association

This document is a part of the TYPO3 project.