requireExtends.onTrait

Code example

<?php declare(strict_types = 1);

/**
 * @phpstan-require-extends SomeClass
 */
class InvalidClass
{
}

Why is it reported?

The @phpstan-require-extends PHPDoc tag is placed on a class. This tag is only valid on traits and interfaces. On a trait, it ensures that any class using the trait extends a specific base class. On an interface, it ensures that implementing classes extend a specific base class. Using it on a regular class has no effect and indicates a mistake.

How to fix it

Remove the @phpstan-require-extends tag from the class:

-/**
- * @phpstan-require-extends SomeClass
- */
 class InvalidClass
 {
 }

If the constraint is intended, move it to a trait or interface where @phpstan-require-extends is valid:

 /**
  * @phpstan-require-extends SomeClass
  */
-class InvalidClass
+trait MyTrait
 {
 }