Automatic Code Lints

TYPO3 Automatic Code Checks

TYPO3 helps you keep your code clean and error-free by performing automatic code checks. It checks your code for errors and style issues as you work, so you don't have to find them yourself. This ensures that your code runs smoothly and is easy to read. No more manual checks - TYPO3 takes care of it!

Automatic code checks find errors and style deviations before they reach production. Tools such as PHP-CS-Fixer, PHPStan or Rector examine the source code without running it and report problems such as wrong types, unused variables or outdated calls. Especially in TYPO3 projects with several developers this ensures consistent code.

Integration into a CI/CD pipeline is common: the check runs automatically on every commit, and faulty changes are not merged. Locally, developers can run the same checks via Git hooks or in the editor and get immediate feedback.

Rules for upgrades are particularly helpful: tools such as Rector recognise outdated TYPO3 functions and automatically suggest modern alternatives. This considerably reduces the manual effort for version changes.

Start with a few clear rules and extend them step by step. That keeps acceptance in the team high, and the quality of your extensions and site packages rises permanently.

Another advantage lies in collaboration: code reviews can concentrate on architecture and subject matter because formatting and simple errors have already been checked automatically. New team members learn the conventions from concrete hints instead of long documents. For agencies with many client projects it is worth maintaining a shared base configuration and adopting it in every project. That way the quality standard stays comparable across all projects, and maintenance becomes more predictable and cheaper.

Document the rules in your project’s README so that everyone involved knows which checks run.

In short: TYPO3 Automatic Code Linting: Clean & Error-Free Code.

Topic: Automatic Code Lints.