requireExtends.internalTrait

Code example

<?php declare(strict_types = 1);

namespace Vendor {
	/** @internal */
	trait InternalTrait {}
}

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

Why is it reported?

The @phpstan-require-extends PHPDoc tag references a trait that is marked as @internal. Internal traits are not part of a package's public API and may be changed or removed at any time.

Note: triggering this identifier requires using a trait in @phpstan-require-extends, which only accepts classes. PHPStan therefore always also reports a requireExtends.trait error alongside this one.

How to fix it

Use a public (non-internal) class in the @phpstan-require-extends tag instead:

 /**
- * @phpstan-require-extends \Vendor\InternalTrait
+ * @phpstan-require-extends \Vendor\PublicBaseClass
  */
 interface MyInterface {}

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