phpstan

Analyse PHP code with PHPStan via the playground API. Tests across all PHP versions (7.2–8.5) and reports errors grouped by version. Supports configuring level, strict rules, and bleeding edge.

Execute PHP code on 3v4l.org to test runtime behavior across multiple PHP versions. Use when you need to verify what PHP actually does with a piece of code.

Add a regression test for an already-fixed PHPStan bug given a GitHub issue number