attribute.deprecatedInterface

Code example

<?php declare(strict_types = 1);

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

#[OldInterface]
class Foo
{
}

Why is it reported?

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

An attribute references an interface that has been marked as @deprecated. Deprecated interfaces are planned for removal in a future version, and attributes should not rely on them.

Note: triggering this identifier requires using an interface as an attribute, which PHP does not support. PHPStan therefore always also reports an attribute.notAttribute error, and in practice the deprecation identifier is not reported alongside it.

How to fix it

Replace the deprecated interface with a proper attribute class:

-#[OldInterface]
+#[NewAttribute]
 class Foo
 {
 }