class.extendsDeprecatedTrait

Code example

<?php declare(strict_types = 1);

/** @deprecated Use NewHelper instead */
trait OldTrait
{
}

class Foo extends OldTrait
{
}

Why is it reported?

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

A class extends a trait that has been marked as @deprecated. Deprecated traits are planned for removal in a future version.

Note: triggering this identifier requires a class to extend a trait, which PHP itself forbids. PHPStan therefore always also reports a non-ignorable class.extendsTrait error alongside this one.

How to fix it

Use use to include the trait, or extend a proper class instead:

-class Foo extends OldTrait
+class Foo
 {
+	use NewHelper;
 }