Simplify by replacing chained $var === const with in_array()

[zonuexe]

This is the same change as the previous one at #2618, but it will be automatically refactored by rules 🤖.

Currently, return $var === 'foo' || $var === 'bar'; and $isFooOrBar = $var === 'foo' || $var === 'bar'; are not covered. It also does not support formulas replaced by De Morgan's laws.

[ondrejmirtes]

Great idea! I'll merge it after this fix.

[ondrejmirtes]

Do not make this a DI service. Ask for ExprPrinter instead which is already a DI service.

[zonuexe]

Thanks, I replaced it with ExprPrinter.

[zonuexe]

I see, the error that occurred after rebasing seems to be independent of the changes in this PR.

Error: Catching internal class PHPUnit\Framework\ExpectationFailedException.
Error: Catching internal class PHPUnit\Framework\ExpectationFailedException.
Error: Call to method getComparisonFailure() of internal class PHPUnit\Framework\ExpectationFailedException from outside its root namespace PHPUnit.
Error: Call to method getComparisonFailure() of internal class PHPUnit\Framework\ExpectationFailedException from outside its root namespace PHPUnit.

[phpstan-bot]

This pull request has been marked as ready for review.

[ondrejmirtes]

Thank you!

An idea: Generalize this rule to also account for if ($a !== 'Foo' && $a !== 'Bar') into !in_array(.....