PHPStan, a static analysis tool for PHP recently released its version 2.0. This release launches new features and improvements related to enhancing code analysis, performance, and user experience.

For the past four years, Facebook has quietly used a homegrown tool called Zoncolan to find bugs in its massive codebase.

Ultimately, writing a good static analysis tool is hard, and there are plenty of cases where it’s likely to trip up and give an invalid result.