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UPGRADING: update information re: return type for internal methods #7182

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Jun 22, 2021
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UPGRADING: update information re: return type for internal methods #7182

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3 changes: 3 additions & 0 deletions UPGRADING
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Expand Up @@ -60,6 +60,9 @@ PHP 8.1 UPGRADE NOTES
. Most non-final internal methods now require overriding methods to declare a
compatible return type, otherwise a deprecated notice is emitted during
inheritance validation.
In case the return type cannot be declared for an overriding method due to
PHP cross-version compatibility concerns, a `#[ReturnTypeWillChange]`
attribute can be added to silence the deprecation notice.
RFC: https://wiki.php.net/rfc/internal_method_return_types

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