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Error Identifier: new.deprecatedClass

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 NewLogger instead */
class OldLogger
{
}

new OldLogger();

Why is it reported? #

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

A deprecated class is being instantiated with new. The class has been marked with @deprecated, indicating it should no longer be used and may be removed in a future version.

How to fix it #

Replace the deprecated class with the recommended replacement:

-new OldLogger();
+new NewLogger();

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

+/** @deprecated */
 function createLogger(): object
 {
 	return new OldLogger();
 }

How to ignore this error #

You can use the identifier new.deprecatedClass to ignore this error using a comment:

// @phpstan-ignore new.deprecatedClass
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: new.deprecatedClass

Rules that report this error #

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

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