TYPO3 v7 has reached its end-of-life November 30th, 2018 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.
There is no further ELTS support. It is recommended that you upgrade your project and use a supported version of TYPO3.
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.