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Error Identifier: enum.allowDynamicProperties

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);

#[\AllowDynamicProperties]
enum Suit
{
	case Hearts;
	case Diamonds;
	case Clubs;
	case Spades;
}

Why is it reported? #

The #[\AllowDynamicProperties] attribute cannot be used with enums. Enums in PHP do not support dynamic properties – they are value types with a fixed set of cases and cannot have instance properties assigned at runtime. This is a language-level restriction enforced by PHP itself.

How to fix it #

Remove the #[\AllowDynamicProperties] attribute from the enum:

-#[\AllowDynamicProperties]
 enum Suit
 {
 	case Hearts;
 	case Diamonds;
 	case Clubs;
 	case Spades;
 }

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\ClassAttributesRule [1]

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