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Error Identifier: enum.implementsDeprecatedClass

Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.

Code example #

<?php declare(strict_types = 1); // lint >= 8.1

/** @deprecated */
interface OldContract
{
	public function execute(): void;
}

enum Status implements OldContract
{
	case Active;
	case Inactive;

	public function execute(): void
	{
	}
}

Why is it reported? #

The enum implements an interface that is marked as @deprecated. Using deprecated interfaces couples new code to APIs that are scheduled for removal, making future upgrades harder. This rule is provided by phpstan-deprecation-rules.

How to fix it #

Switch to the non-deprecated replacement interface, if one exists:

-enum Status implements OldContract
+enum Status implements NewContract
 {
 	case Active;
 	case Inactive;
 }

If no replacement exists yet, check the deprecation message for migration guidance.

How to ignore this error #

You can use the identifier enum.implementsDeprecatedClass to ignore this error using a comment:

// @phpstan-ignore enum.implementsDeprecatedClass
codeThatProducesTheError();

You can also use only the identifier key to ignore all errors of the same type in your configuration file in the ignoreErrors parameter:

parameters:
	ignoreErrors:
		-
			identifier: enum.implementsDeprecatedClass

Rules that report this error #

• PHPStan\Rules\Deprecations\RestrictedDeprecatedClassNameUsageExtension [1] phpstan/phpstan-deprecation-rules

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