← Back to new.*

Error Identifier: new.enum

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 Clubs;
	case Spades;
}

$suit = new Suit(); // error: Cannot instantiate enum Suit.

Why is it reported? #

Enums in PHP cannot be instantiated using the new keyword. Enum cases are predefined singleton instances and must be accessed directly via their case names (e.g., Suit::Hearts). Attempting to use new on an enum will result in a fatal error at runtime.

How to fix it #

Use the enum case directly instead of trying to instantiate it.

-$suit = new Suit();
+$suit = Suit::Hearts;

How to ignore this error #

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

// @phpstan-ignore new.enum
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: new.enum

Rules that report this error #

• PHPStan\Rules\Classes\InstantiationRule [1]

Edit this page on GitHub