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Error Identifier: enum.duplicateEnumCase

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);

enum Suit
{
	case Hearts;
	case Diamonds;
	case Hearts;
}

Why is it reported? #

An enum declares two cases with the same name. Each enum case must have a unique name within the enum. PHP does not allow redeclaring an enum case, just as it does not allow redeclaring a class constant.

How to fix it #

Remove the duplicate case or rename it:

 enum Suit
 {
 	case Hearts;
 	case Diamonds;
-	case Hearts;
+	case Clubs;
 }

Non-ignorable error #

This error cannot be ignored using @phpstan-ignore or the ignoreErrors configuration. Non-ignorable errors indicate code that would cause a crash or a fatal error at runtime, or a fundamental problem in the analysed code that must be addressed.

Rules that report this error #

• PHPStan\Rules\Classes\DuplicateDeclarationRule [1]

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