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Error Identifier: staticMethod.deprecatedTrait

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 static function compute(): int
	{
		return 42;
	}
}

class MyClass
{
	use OldHelper;
}

function doFoo(): void
{
	OldHelper::compute();
}

Why is it reported? #

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

A static method is being called on a trait that is marked as @deprecated. Deprecated traits are scheduled for removal or replacement. Calling static methods on them ties the code to an API that will eventually be removed.

How to fix it #

Use the recommended replacement trait or class instead:

 <?php declare(strict_types = 1);
 
 function doFoo(): void
 {
-	OldHelper::compute();
+	NewHelper::compute();
 }

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

 <?php declare(strict_types = 1);
 
+/** @deprecated */
 function doFoo(): void
 {
 	OldHelper::compute();
 }

How to ignore this error #

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

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

Rules that report this error #

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

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