TYPO3 v8 has reached its end-of-life March 31st, 2020 and is not maintained by the community anymore.

You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.

PHP architecture

Best practices and rules of thumb when developing for TYPO3.

This chapter aims to give developers some ideas and practices at hand when PHP architectural decisions have to be taken. Result should be a understanding of some thoughts behind and a harmonization of solutions found in the TYPO3 CMS core and maybe in third party extensions. It should help reviewers to evaluate solutions and how they stick to the main code separation principles the core tries to follow. The document should help developers to train their architectural skills and to rate easier which pattern matches a given problem to improve code quality and exchangeability.