PHP 8.1: fix deprecation notice #57
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As of PHP 8.1, PHP will start throwing deprecation warnings along the lines of: ``` Deprecated: Return type of [CLASS]::[METHOD]() should either be compatible with [PHP NATIVE INTERFACE]::[METHOD](): [TYPE], or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice ``` These type of deprecation notices relate to the [Return types for internal methods RFC](https://wiki.php.net/rfc/internal_method_return_types) in PHP 8.1. Basically, as of PHP 8.1, these methods in classes which implement PHP native interfaces are expected to have a return type declared. The return type can be the same as used in PHP itself or a more specific type. This complies with the Liskov principle of covariance, which allows the return type of a child overloaded method to be more specific than that of the parent. The return type for `ArrayAccess::offsetGet()` is supposed to be `mixed`, but as that is a PHP 8.0 type, it cannot yet be added. Ref: https://www.php.net/manual/en/class.arrayaccess.php With that in mind, I've added the annotation instead. The other methods in this class were already declared with the appropriate return type. Note: While attributes are a PHP 8.0 feature only, due to the syntax choice for `#[]`, they will ignored in PHP < 8 and can be safely added.
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The CI failure is due to the Slevomat CS check not yet recognizing classes being used in annotations. This should be reported upstream. @rdohms Want me to add an exclude for this issue in the CS config ? |
This was referenced Oct 13, 2021
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As of PHP 8.1, PHP will start throwing deprecation warnings along the lines of:
These type of deprecation notices relate to the Return types for internal methods RFC in PHP 8.1.
Basically, as of PHP 8.1, these methods in classes which implement PHP native interfaces are expected to have a return type declared.
The return type can be the same as used in PHP itself or a more specific type. This complies with the Liskov principle of covariance, which allows the return type of a child overloaded method to be more specific than that of the parent.
The return type for
ArrayAccess::offsetGet()is supposed to bemixed, but as that is a PHP 8.0 type, it cannot yet be added.Ref: https://www.php.net/manual/en/class.arrayaccess.php
With that in mind, I've added the annotation instead.
The other methods in this class were already declared with the appropriate return type.
Note: While attributes are a PHP 8.0 feature only, due to the syntax choice for
#[], they will ignored in PHP < 8 and can be safely added.