Error Identifier: classConstant.deprecatedTrait

← Back to classConstant.*

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
{
	public const VERSION = '1.0';
}

echo OldHelper::VERSION;

Why is it reported? #

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

A class constant is accessed directly on a trait that has been marked as @deprecated. Deprecated traits are planned for removal in a future version, and code should not rely on their constants.

How to fix it #

Access the constant from a non-deprecated source instead:

-echo OldHelper::VERSION;
+echo NewHelper::VERSION;

How to ignore this error #

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

// @phpstan-ignore classConstant.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: classConstant.deprecatedTrait

Rules that report this error #

• PHPStan\Rules\Deprecations\RestrictedDeprecatedClassConstantUsageExtension [1] [2] phpstan/phpstan-deprecation-rules
• PHPStan\Rules\Deprecations\RestrictedDeprecatedClassNameUsageExtension [1] phpstan/phpstan-deprecation-rules