Error Identifier: requireImplements.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 NewTrait instead */
trait OldTrait
{
}

/**
 * @phpstan-require-implements OldTrait
 */
trait MyTrait
{
}

Why is it reported? #

The @phpstan-require-implements PHPDoc tag references a trait that has been marked with @deprecated. Using deprecated symbols leads to issues when they are eventually removed. PHPStan reports this so that the reference can be updated to the recommended replacement.

This error is reported by phpstan/phpstan-deprecation-rules.

How to fix it #

Replace the deprecated trait with its recommended replacement:

 <?php declare(strict_types = 1);
 
 /**
- * @phpstan-require-implements OldTrait
+ * @phpstan-require-implements NewInterface
  */
 trait MyTrait
 {
 }

How to ignore this error #

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

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

Rules that report this error #

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

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