PHPStan

PHPStan runs static analysis for your code without running it. To check the code running following:

sail composer phpstan

Command will output all errors for you

Usage in PHPStorm

PHPStorm has support for PHPStan as quality tool.

Important: To configure it first make sure that you set up PHPStorm's PHP interpreter correctly.

Open Preferences... > PHP > Quality tools > PHPStan, click ... on the right side of Configuration:.

If you only see Local configuration then click + choose Docker based PHP Interpreter.

If PHPStorm does not automatically detect PHPStan path then add it manually: /var/www/html/vendor/bin/phpstan

Click Validate, if everything is correct you should be able to see "OK" message down below.

Next, click PHPStan inspection link, it will open up PHPStorm's inspections configuration.

Tick PHPStan validation, on the left side enter Level as 8 and choose phpstan.neon file from project's root directory as Configuration file

Click OK on all windows and close

Lastly, make sure you on Preferences... > PHP > Quality tools > PHPStan > Configuration: correct PHP Interpreter is selected

Now everytime PHPStorm notices PHPStan rule violation it will show a "warning" message.