traitUse.deprecatedClass

Code example

<?php declare(strict_types = 1);

/** @deprecated Use NewFeature instead */
class OldFeature
{
}

class Foo
{
	use OldFeature;
}

Why is it reported?

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

A use statement in a class body references a deprecated class. The class has been marked with @deprecated and is scheduled for removal or replacement. Any usage of it should be migrated to the recommended alternative.

How to fix it

Replace the deprecated class with the recommended replacement:

 class Foo
 {
-	use OldFeature;
+	use NewFeature;
 }

If the calling code is itself deprecated, the error will not be reported. Mark the class as deprecated if it is part of a deprecation migration:

+/** @deprecated */
 class Foo
 {
 	use OldFeature;
 }