Fabian Grutschus created NETBEANS-6078:
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Summary: Remove `mixed` type from JsonSerializable
Key: NETBEANS-6078
URL: https://issues.apache.org/jira/browse/NETBEANS-6078
Project: NetBeans
Issue Type: Improvement
Components: php - Code Analysis
Reporter: Fabian Grutschus
Hello,
I get the following error when using JsonSerializable in a PHP project:
{quote}{className} is not abstract and does not override abstract method
jsonSerialize() in \JsonSerializable
{quote}
The PHP code is the following:
{code:java}
<?php
class ClassName implements JsonSerializable {
public function jsonSerialize(): array {
return [];
}
}
{code}
As of PHP 8 {{JsonSerializable::jsonSerialize()}} has the return type mixed
defined and Netbeans now defines that return type. But it is perfectly fine to
change the return type of an interface method with return type mixed.
>From the RFC:
{quote}"The mixed return type could be narrowed in a subclass as this is
covariant and is allowed in LSP." ([https://wiki.php.net/rfc/mixed_type_v2])
{quote}
The error is very misleading and wrong. So I propose removing `mixed` again
from the interface definition in Netbeans.
Thank you!
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