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Error Identifier: requireExtends.onEnum

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);

/**
 * @phpstan-require-extends SomeClass
 */
enum Status
{
	case Active;
	case Inactive;
}

Why is it reported? #

The @phpstan-require-extends PHPDoc tag is placed on an enum. This tag is only valid on traits and interfaces. Enums in PHP cannot extend classes, so a @phpstan-require-extends constraint on an enum has no meaning and cannot be fulfilled.

How to fix it #

Remove the @phpstan-require-extends tag from the enum:

-/**
- * @phpstan-require-extends SomeClass
- */
 enum Status
 {
 	case Active;
 	case Inactive;
 }

If the constraint is needed, move it to a trait or interface that the enum can implement:

 /**
  * @phpstan-require-extends SomeClass
  */
-enum Status
+interface StatusInterface
 {
-	case Active;
-	case Inactive;
 }

How to ignore this error #

You can use the identifier requireExtends.onEnum to ignore this error using a comment:

// @phpstan-ignore requireExtends.onEnum
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: requireExtends.onEnum

Rules that report this error #

• PHPStan\Rules\PhpDoc\RequireExtendsDefinitionClassRule [1]

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