TYPO3 v9 has reached its end-of-life September 30th, 2021 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.
You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.
PHP File Formatting¶
This part is about structure of single PHP files. For an overview of file locations, PHP namespaces and general TYPO3 directories, please refer to TYPO3 directory structure, Extension files and locations and PHP file namespaces.
Rules for single PHP files: