The ReturnTypeWillChange attribute
(PHP 8 >= 8.1.0)
Introduction
Most non-final internal methods now require overriding methods to declare
a compatible return type, otherwise a deprecated notice is emitted during
inheritance validation. This introduces a tentative return type phase:
the engine emits a deprecation notice instead of a fatal error when return
types are incompatible, before they become enforced in a future version.
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.
The ReturnTypeWillChange attribute suppresses deprecation warnings during the tentative return type phase only. It has no effect when overriding methods defined in user-defined classes. Once internal methods adopt strict types, mismatches in overriding method signatures will cause a fatal error and this attribute will no longer have any effect.
Class synopsis
See Also
Table of Contents
- ReturnTypeWillChange::__construct — Construct a new ReturnTypeWillChange attribute instance
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