Fix #14205: Incorrect: Class referenced with incorrect case,

[phpstan-bot]

Summary

When a use alias happened to case-insensitively match a different class in the same namespace, PHPStan incorrectly reported a class.nameCase error. For example, with use App\Team\SamenstellingService as TeamSamenstellingService;, PHPStan would report that TeamsamenstellingService (a separate class) was referenced with incorrect case, even though the alias was never meant to refer to that class.

Changes

• Modified getOriginalClassNamePairsFromTypeNode() in src/Rules/FunctionDefinitionCheck.php to detect use aliases vs case variants
• Added a check comparing original name parts with the resolved name's suffix parts case-insensitively; if any part differs (not just in case), the original name is a use alias and no "original case" pair is created
• Added regression test in tests/PHPStan/Rules/Methods/data/bug-14205.php

Root cause

getOriginalClassNamePairsFromTypeNode() reconstructs the "original case" class name by combining the namespace prefix from the resolved name with the original name parts (from PHP-Parser's originalName attribute). When a use ... as alias is involved, the original name is the alias itself, not the target class. The reconstructed name (App\Team\TeamSamenstellingService) was then checked against the reflection provider, which case-insensitively matched it to the unrelated class TeamsamenstellingService, triggering a false positive.

The fix detects that the original parts don't case-insensitively match the corresponding resolved parts, identifying it as a use alias rather than a case variant, and skips creating the pair.

Test

Added tests/PHPStan/Rules/Methods/data/bug-14205.php with two classes (TeamsamenstellingService and SamenstellingService) and a use alias (SamenstellingService as TeamSamenstellingService). The test expects no errors, confirming the false positive is eliminated.

Fixes phpstan/phpstan#14205

[VincentLanglet]

I pushed on the branch, please take a new look @staabm

Also, I discovered that alias are currently not reported when mismatch casing
https://phpstan.org/r/14ef80f7-a916-4f4b-a1c3-675c2492f383 but that's another fix.