enum.implementsDeprecatedInterface - Phpstan

Code example

php

<?php declare(strict_types = 1);

/** @deprecated Use NewInterface instead */
interface OldInterface
{
	public function doSomething(): void;
}

enum Status: string implements OldInterface
{
	case Active = 'active';
	case Inactive = 'inactive';

	public function doSomething(): void
	{
	}
}

Why is it reported?

This error is reported by the phpstan-deprecation-rules extension.

An enum implements an interface that has been marked as @deprecated. Implementing deprecated interfaces ties the enum to a contract that is planned for removal.

In the example above, enum Status implements OldInterface, which is deprecated.

How to fix it

Replace the deprecated interface with its recommended replacement:

diff-php

 <?php declare(strict_types = 1);

-enum Status: string implements OldInterface
+enum Status: string implements NewInterface
 {
 	case Active = 'active';
 	case Inactive = 'inactive';

 	public function doSomething(): void
 	{
 	}
 }