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TYPO3's PSR-14 event listeners replace stringly-typed hooks with typed, ordered, injectable classes. Here's a worked migration example, plus where hooks are still unavoidable.
In TYPO3 v12, the transition from the deprecated Signal/Slot system to the PSR-14 EventDispatcher introduces a challenge regarding execution order. While Signal/Slot allowed for explicit integer priorities, the current PSR-14 implementation in TYPO3 sorts listeners by priority and then by service ID. This makes the execution sequence non-deterministic when m
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