- partially move PHPStan to level6

[vv12131415]

Subject

During last update (to level 5) #6277 (comment) I thought that it will be last one, because level 6 gives 983 errors in 136 files. But now I've discovered that, you can enable rules partially and found config folder (https://github.com/phpstan/phpstan-src/tree/master/conf) of PHPStan, where it describes each level. I'll do smallest possible rule adding, since it can take long time to merge big PRs.

I am targeting this branch, because it's not BC break.

Changelog

Half way to phpstan level 6

Pedantic PR.

---

This is how config looks with error count

includes:
    - phpstan-baseline.neon

parameters:
    parallel:
        processTimeout: 300.0
    level: 5
    paths:
        - src
    excludes_analyse:
        # temporarily ignore template files
        - src/Resources/**.tpl.php
    scanFiles:
        # NEXT_MAJOR: Remove those files
        - .phpstan/stubs/MetadataInterface.file
        - .phpstan/stubs/Exporter.file
        - .phpstan/stubs/TextExtension.file
    checkGenericClassInNonGenericObjectType: true
    checkMissingIterableValueType: true
    checkMissingVarTagTypehint: true
    checkMissingTypehints: true
    # level 7
    #checkUnionTypes: true - 109 errors
    #reportMaybes: true - 7 errors
    # level 8
    #checkNullables: true - 14 erros

rules:
    - PHPStan\Rules\Functions\MissingFunctionParameterTypehintRule
    - PHPStan\Rules\Functions\MissingFunctionReturnTypehintRule
    # level 6
    #- PHPStan\Rules\Methods\MissingMethodParameterTypehintRule - 291 errors
    #- PHPStan\Rules\Methods\MissingMethodReturnTypehintRule - 383 errors
    #- PHPStan\Rules\Properties\MissingPropertyTypehintRule - 52 errors

[OskarStark]

Can you pleaee make it a draft PR until ready? Thanks

[vv12131415]

Can you pleaee make it a draft PR until ready? Thanks

Tbh, I thought it is ready

[greg0ire]

Thanks @vladyslavstartsev!