Commit 8e636d53 authored by Brent Shaffer's avatar Brent Shaffer Committed by Copybara-Service
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fix: php 8.2 dynamic property warning in MapFieldIter (#11485) 

addresses #11243

Defines `$key_type` in `MapFieldIter`, so as not to trigger PHP 8.2 warning. Note that this will change the visibility of `$key_type` from public in previous versions to private in this version. This is a breaking change, but anyone using `$key_type` in this way is misusing the library, so I think it's acceptable.

Closes #11485

COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/11485 from bshaffer:fix-php-82-dynamic-warning-in-MapFieldIter b45c34d2be58551d44f04e938e83fbb19d9a6cf2
PiperOrigin-RevId: 501040413
parent 5330a36c
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