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Rule set ``@PHP8x4Migration``
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Rules to improve code for PHP 8.4 compatibility.

Rules
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- `@PHP8x3Migration <./PHP8x3Migration.rst>`_
- `new_expression_parentheses <./../rules/operator/new_expression_parentheses.rst>`_
- `nullable_type_declaration_for_default_null_value <./../rules/function_notation/nullable_type_declaration_for_default_null_value.rst>`_