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Error Identifier: attribute.notAttribute

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);

class MyClass
{
}

#[MyClass]
class Foo
{
}

Why is it reported? #

A class is used as a PHP attribute, but it is not declared as an attribute class. In PHP 8.0+, a class must be marked with the built-in #[\Attribute] attribute to be usable as an attribute. Without this declaration, PHP will throw an error at runtime.

In the example above, MyClass is used as #[MyClass] but is not annotated with #[\Attribute].

How to fix it #

Add the #[\Attribute] declaration to the class:

 <?php declare(strict_types = 1);
 
+#[\Attribute]
 class MyClass
 {
 }

 #[MyClass]
 class Foo
 {
 }

If the class was not intended to be used as an attribute, remove the attribute usage:

 <?php declare(strict_types = 1);
 
 class MyClass
 {
 }

-#[MyClass]
 class Foo
 {
 }

How to ignore this error #

You can use the identifier attribute.notAttribute to ignore this error using a comment:

// @phpstan-ignore attribute.notAttribute
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: attribute.notAttribute

Rules that report this error #

• PHPStan\Rules\Classes\ClassAttributesRule [1]
• PHPStan\Rules\Classes\ClassConstantAttributesRule [1]
• PHPStan\Rules\Constants\ConstantAttributesRule [1]
• PHPStan\Rules\EnumCases\EnumCaseAttributesRule [1]
• PHPStan\Rules\Functions\ArrowFunctionAttributesRule [1]
• PHPStan\Rules\Functions\ClosureAttributesRule [1]
• PHPStan\Rules\Functions\FunctionAttributesRule [1]
• PHPStan\Rules\Functions\ParamAttributesRule [1]
• PHPStan\Rules\Methods\MethodAttributesRule [1]
• PHPStan\Rules\Properties\PropertyAttributesRule [1]
• PHPStan\Rules\Properties\PropertyHookAttributesRule [1]
• PHPStan\Rules\Traits\TraitAttributesRule [1]

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