👋 Hi there

My name is Markus Staab, a open source enthusiast since 2008 ✨.

Markus Staab - open-source lover, creator of staabm/phpstan-dba, staabm/phpstan-todo-by, rexstan and rexfactor.

I am one of the top contributors💫 to PHPStan, Rector, Infection and PHPUnit. It’s likely you read my name in the changelog or release notes somewhere.

Below you can find a list of my personal contribution highlights:

A mixed type PHPStan journey
@param-out implementation in PHPStan
type inference for regular expressions in PHPStan, see also my blog post
@require-extends and @require-implements in PHPStan, see also my blog post
non-falsy-string type in PHPStan, see also my blog post
PHPStan sprintf()/sscanf() type inference, see also my blog post
Endless pull requests to improve performance and efficiency in PHPStan and Rector
Hundreds of bug fixes in PHPStan, Rector, PHPUnit, Composer…

Additionally I am the developer behind cs2pr, phpstan-dba, phpstan-todo-by, rexstan and a few more projects.

For fun and educating myself I contributed to various projects - REDAXO, filp/whoops, sabre/dav, stomp-php, propelorm - to name a few of them.

If one of those open source projects is critical for your business, please consider supporting my work with your sponsoring 💕. I am also available for paid support of PHPStan and related static analysis tooling.

Mastodon

Talks

phpstan-dba - check your sql queries like a boss
May 2023, at PHP Usergroup in Frankfurt Main (Germany).

Top projects

phpstan-dba: PHPStan based SQL static analysis and type inference for the database access layer
phpstan-todo-by: Todo comments with expiration
phpstan-baseline-analysis: Analyzes PHPStan baseline files and creates aggregated error trend-reports
annotate-pull-request-from-checkstyle: Annotate a GitHub Pull Request based on a Checkstyle XML-report within your GitHub Action

Posts

Aug 1, 2025
Mutation testing with Infection in PHP
Apr 15, 2025
PHPStan remembered types from constructor
Jan 24, 2025
Thank You
Dec 11, 2024
Contribution Summary 2024
Nov 28, 2024
My new PHPStan focus: multi-phpversion support
Nov 26, 2024
A mixed type PHPStan journey
Nov 17, 2024
PHPStan performance on different hardware
Nov 14, 2024
Dead code detection for PHP_* constants
Oct 19, 2024
PHPUnit codesprint Munich
Jul 5, 2024
Array Shapes For Preg Match Matches
Jun 28, 2024
Readable end-to-end tests for PHPStan with bashunit
Jan 15, 2024
Sponsored PHPStan feature: require-extends and require-implements phpDoc
Jan 10, 2024
Published: Open source contributions statistics generator
Jan 1, 2024
PHPStan tailored to your needs
Dec 17, 2023
Published: phpstan-todo-by
Dec 7, 2023
Contribution Summary 2023
Oct 30, 2023
PHPStan baseline filter
Oct 21, 2023
PHPStan result cache gotchas
Jul 23, 2023
Rector in legacy projects
May 18, 2023
DOCtor-RST speedup
May 10, 2023
How To Debug Slow Rector Projects
May 6, 2023
Racing Rector
May 1, 2023
Rector diff speeding
Apr 9, 2023
Rexfactor Introduction
Dec 29, 2022
Make PHPStan aware of your APIs’ implications️
Dec 23, 2022
PHPStan speedzember
Dec 20, 2022
2022 Wrap Up
Aug 16, 2022
Detect slow queries before they hit your production database
Aug 11, 2022
New PHPStan phpdoc type: non-falsy-string
Aug 5, 2022
Check your sql queries for errors
Jul 30, 2022
Placeholder validation in sql queries
Jul 23, 2022
Type inference for dynamic sql queries
Jul 12, 2022
rexstan meets phpstan-dba
Jul 4, 2022
Analyze your PHPStan baseline
Jun 30, 2022
Monthly report: June 2022
Jun 24, 2022
GitHub Maintainer Month
Jun 23, 2022
PHPStan sprintf/sscanf type inference
Jun 19, 2022
phpstan-dba type inference
Jun 18, 2022
rexstan - PHPStan REDAXO CMS AddOn
Jun 3, 2022
phpstan-dba is adopted by popular projects
May 30, 2022
Thanks to my new sponsors
May 30, 2022
Monthly report: May 2022
May 1, 2022
phpstan-dba static analysis
Apr 3, 2022
cs2pr - GitHub Pull Request annotation
Feb 14, 2022
Achievement unlocked: 75 PHPStan pull requests merged