class.implementsDeprecatedEnum

Code example

<?php declare(strict_types = 1);

/** @deprecated Use NewInterface instead */
enum OldEnum
{
	case Foo;
}

class Bar implements OldEnum
{
}

Why is it reported?

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

A class has a deprecated enum in its implements clause. The enum is marked as @deprecated and is planned for removal.

In the example above, class Bar references OldEnum in its implements clause, and OldEnum is deprecated. Note that using an enum in implements is also invalid PHP -- only interfaces can be implemented.

How to fix it

Replace the deprecated enum with a proper interface:

 <?php declare(strict_types = 1);

-class Bar implements OldEnum
+class Bar implements NewInterface
 {
 }