Error Identifier: requireExtends.internalClass

← Back to requireExtends.*

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);

namespace Vendor {
	/** @internal */
	class InternalBase {}
}

namespace App {
	/**
	 * @phpstan-require-extends \Vendor\InternalBase
	 */
	interface MyInterface {}
}

Why is it reported? #

The @phpstan-require-extends PHPDoc tag references a class that is marked as @internal. Internal classes are not part of the public API of their package and may change or be removed without notice. Referencing an internal class in a require-extends constraint creates a dependency on an implementation detail that may break at any time.

How to fix it #

Use a public (non-internal) class from the package instead:

 /**
- * @phpstan-require-extends \Vendor\InternalBase
+ * @phpstan-require-extends \Vendor\PublicBase
  */
 interface MyInterface {}

If no public alternative exists, consider whether the constraint is necessary, or contact the package maintainer to request a public API.

How to ignore this error #

You can use the identifier requireExtends.internalClass to ignore this error using a comment:

// @phpstan-ignore requireExtends.internalClass
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: requireExtends.internalClass

Rules that report this error #

• PHPStan\Rules\InternalTag\RestrictedInternalClassNameUsageExtension [1]