Error Identifier: generics.notCompatible
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);
/**
* @template T
*/
interface Collection
{
}
/**
* @implements int
*/
class NumberList implements Collection
{
}
Why is it reported? #
The @implements, @extends, or @use PHPDoc tag specifies a type that is not a valid generic type for the referenced class or interface. The type in the tag must be a generic type like Collection<int>, not a plain type like int. PHPStan expects the tag to match the generic signature of the parent class or interface.
How to fix it #
Use the correct generic type syntax in the PHPDoc tag:
/**
- * @implements int
+ * @implements Collection<int>
*/
class NumberList implements Collection
{
}
If the parent class or interface has multiple template parameters, specify all of them:
/**
- * @implements Map<string>
+ * @implements Map<string, int>
*/
class StringIntMap implements Map
{
}
How to ignore this error #
You can use the identifier generics.notCompatible to ignore this error using a comment:
// @phpstan-ignore generics.notCompatible
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.notCompatible