PHPStan 2.3 breaks test suite #28

Summary

composer test passes on PHPStan 2.2.x (62/62) but fails on 2.3.1 (10 failures). Not caused by recent extension commits — same code, different PHPStan version.

composer.lock is gitignored, so composer install can pull PHPStan 2.3.1 via phpstan-strict-rules 2.1.0 (^2.3).

Failures

1. pll_the_languages() — void → null (8 tests)

tests/data/pll_the_languages.php expects void; PHPStan 2.3 infers null for default calls.

2. Options foreach — lost narrowing (2 tests)

tests/data/options_edge_cases.php:19–20 — foreach ($options['domains'] as $lang => $domain) infers mixed for loop variables on 2.3. Direct access ($options['domains']) still works. Passes on 2.2.

Workaround: assign first ($domains = $options['domains']; foreach ($domains as …)).

Repro

composer require phpstan/phpstan:^2.3 phpstan/phpstan-strict-rules:^2.1 --dev -W && composer test  # 10 failures
composer require phpstan/phpstan:2.2.14 phpstan/phpstan-strict-rules:2.0.4 --dev -W && composer test  # 62/62

Tasks

• Update pll_the_languages test fixtures (void → null) and README
• Document foreach assign-first workaround in README
• Pin PHPStan version or add CI matrix (2.2 + 2.3)
• Consider committing composer.lock