Error Identifier: parameter.deprecatedTrait

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Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.

Code example #

<?php declare(strict_types = 1);

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

class Foo
{
	/** @param OldHelper $x */
	public function doFoo($x): void
	{
	}
}

Why is it reported? #

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

A function or method parameter has a PHPDoc type that references a trait marked as @deprecated. Deprecated traits are planned for removal in a future version, and parameter types should not rely on them.

How to fix it #

Replace the deprecated trait with a non-deprecated type in the PHPDoc tag:

 class Foo
 {
-	/** @param OldHelper $x */
+	/** @param NewHelper $x */
 	public function doFoo($x): void
 	{
 	}
 }

How to ignore this error #

You can use the identifier parameter.deprecatedTrait to ignore this error using a comment:

// @phpstan-ignore parameter.deprecatedTrait
codeThatProducesTheError();

You can also use only the identifier key to ignore all errors of the same type in your configuration file in the ignoreErrors parameter:

parameters:
	ignoreErrors:
		-
			identifier: parameter.deprecatedTrait

Rules that report this error #

• PHPStan\Rules\Deprecations\RestrictedDeprecatedClassNameUsageExtension [1] phpstan/phpstan-deprecation-rules