TYPO3 can be completely customized using extensions, but creating an extension can be a challenging task. This book describes the creation of the TYPO3 extension as it should be done. Starting from an overview of the API TYPO3 and gives recommendations on when and how to use this API at large. Since front-end plugin is the most popular type of TYPO3 extensions, the book has a chapter dedicated to the process of programming plugin front-end. What you will learn from this book? Master TYPO3 API function to know the class and Learn all about the expansion category and file structure for extensions Understand the planning problem to take care of before the Select database TYPO3 and effective form of development types and adjust the resulting columns for your needs Create a plugin front-end - configure, templates, localization, and caching program and produce a front-end plugin uses AJAX response action scripts and Eid Program back-end module - planning, database management, linking with the front end, and applying Upload your extension to the extension repository TYPO3's (TER) Write documentation follows the template set and beautify your code with extdeveval Approach The book is structured so that the following chapters in order to build a TYPO3 extension from bottom to top. Readers are encouraged to not only read books, but also to look into the class and really discussed the extension code when reading books. Who is this book written for? This book is for PHP developers who want to develop a TYPO3 extension. No previous knowledge of programming or API TYPO3 TYPO3 extensions are considered.