new.deprecatedTrait

Code example

<?php declare(strict_types = 1);

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

$x = new OldTrait();

Why is it reported?

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

A deprecated trait is used in a new expression. The trait has been marked with @deprecated, indicating it is scheduled for removal or replacement.

Note: triggering this identifier requires instantiating a trait, which PHP does not allow. PHPStan therefore always also reports a new.trait error, and in practice the deprecation identifier is not reported alongside it.

How to fix it

Use the replacement type suggested in the deprecation message:

-$x = new OldTrait();
+$x = new NewHelper();