[DowngradePhp81] Add AddReturnTypeWillChangeAttributeRector#372
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TomasVotruba merged 1 commit intoMay 30, 2026
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- PHP 8.1 added provisional return types to built-in interfaces (ArrayAccess, Countable, Iterator, IteratorAggregate, Stringable), triggering deprecation notices on implementations without matching return types. - This rule automatically adds #[\ReturnTypeWillChange] to affected methods, suppressing those notices for codebases that need to remain compatible with older PHP versions and cannot yet add the required return types. Fixes: rectorphp/rector#9515
Member
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Hi @jquiaios , thanks for the fix 👍 Let's ship it and see how it performs on Rector codebase downgrade |
samsonasik
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May 30, 2026
Contributor
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Hi @jquiaios @samsonasik ! Thanks for working on this! Would it be possible to also extend this to Should I open a new issue for that? Best wishes, |
Member
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Hey, sure. Can you send PR with the change instead? It would be faster for us to ship |
Contributor
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Hi @TomasVotruba! Sure! I created #380 with Best wishes, |
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Hello there 👋
Here's a proposition to fix this old issue rectorphp/rector#9515
Here's a global explanation of the issue and proposed fix (if necessary):
PHP 8.1 added provisional return types to built-in interfaces (
ArrayAccess,Countable,Iterator,IteratorAggregateandStringable), triggering deprecation notices on implementations without matching return types.I created a new
AddReturnTypeWillChangeAttributeRectorrule that automatically detects affected methods, and adds#[\ReturnTypeWillChange]to suppress those notices.The rule is registered in the downgrade-php81 set so it runs automatically for anyone using ->withDowngradeSets(php81: true).
The rule is covered by unit tests, including fixtures for the positive cases (
ArrayAccess,Countable,Iterator,IteratorAggregateandStringable), and skip cases (method already has a return type, attribute already present).