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Error Identifier: generics.deprecatedInterfaceDefault

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.

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

Code example #

<?php declare(strict_types = 1);

/** @deprecated Use NewInterface instead */
interface OldInterface
{
}

/**
 * @template T = OldInterface
 */
class Container
{
}

Why is it reported? #

A @template tag uses a deprecated interface as its default type. The interface referenced in the default value of the template parameter has been marked with the @deprecated PHPDoc tag, indicating it is scheduled for removal or replacement. When the deprecated interface is removed, the template default will become invalid.

How to fix it #

Replace the deprecated interface with its recommended replacement in the template default:

 <?php declare(strict_types = 1);
 
 /**
- * @template T = OldInterface
+ * @template T = NewInterface
  */
 class Container
 {
 }

How to ignore this error #

You can use the identifier generics.deprecatedInterfaceDefault to ignore this error using a comment:

// @phpstan-ignore generics.deprecatedInterfaceDefault
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: generics.deprecatedInterfaceDefault

Rules that report this error #

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

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