https://phpstan.org/
PHPStan seems more polished (perhaps because it's commercial and has a 'pro' version that adds a GUI) whereas [[phan ]] is the original PHP static analysis tool Rasmus Ledorf uses.
PHPStan has some very notable projects that integrate it: Symphony, Doctrine, Monolog, and many more. Once again, (A common refrain: there are PHPStan integrations for Drupal and Wordpress, but not MediaWiki.)
Adding a configuration file for your MediaWiki extension is straightforward and would look like this:<syntaxhighlight lang="yaml">
The '''scanDirectories''' are additional paths used to discover symbols, but not analyze for errors.
== Analyzing a forest ==
See [[PHPStan/configuration]] for a sample configuration file used for auditing a large installed base of MediaWiki extensions.
== Analyzing in depth ==
For an example of best-practices, single extension usage, see [https://github.com/ProfessionalWiki/Maps/blob/ee88211fadb3573b646cce005383450e96c3054e/phpstan.neon the example of Professional Wiki's Maps extension] which illustrates configuration file includes of a 'baseline'; error message suppression; and directory exclusions of problem code.