Error Identifier: typeAlias.invalidType

← Back to typeAlias.*

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-type MyType int<0>
 */
class Foo
{
}

Why is it reported? #

A type alias defined via @phpstan-type contains a type definition that resolves to an invalid type. While the type syntax may be parseable, it produces an error type that PHPStan cannot work with.

Common causes include:

• Using invalid generic type arguments (e.g. int<0> instead of int<0, max>)
• Type definitions that resolve to impossible or contradictory types

How to fix it #

Correct the type definition in the @phpstan-type tag:

 /**
- * @phpstan-type MyType int<0>
+ * @phpstan-type MyType int<0, max>
  */
 class Foo
 {
 }

How to ignore this error #

You can use the identifier typeAlias.invalidType to ignore this error using a comment:

// @phpstan-ignore typeAlias.invalidType
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: typeAlias.invalidType

Rules that report this error #

• PHPStan\Rules\Classes\LocalTypeAliasesRule [1]
• PHPStan\Rules\Classes\LocalTypeTraitAliasesRule [1]
• PHPStan\Rules\Classes\LocalTypeTraitUseAliasesRule [1]