class.extendsDeprecatedInterface

Code example

<?php declare(strict_types = 1);

/** @deprecated Use NewInterface instead */
interface OldInterface
{
}

class Foo extends OldInterface
{
}

Why is it reported?

This error is reported by the phpstan-deprecation-rules extension.

A class extends a type that has been marked as @deprecated. Extending deprecated types ties your class to implementations that are planned for removal.

In the example above, class Foo extends OldInterface, which is deprecated.

How to fix it

Replace the deprecated type with its recommended replacement:

 <?php declare(strict_types = 1);

-class Foo extends OldInterface
+class Foo extends NewInterface
 {
 }