Error Identifier: enum.duplicateProperty
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);
enum Suit: string
{
case Hearts = 'hearts';
// Enums cannot have properties, but if they could,
// this rule also applies to classes and interfaces
}
This error is reported by the same rule that checks classes and interfaces for duplicate property declarations:
<?php declare(strict_types = 1);
class Foo
{
public int $prop;
public int $prop;
}
Why is it reported? #
A property with the same name is declared more than once in the same class or enum. PHP does not allow redeclaring properties within a single class definition. This also applies when a property is declared both as a regular property and as a constructor-promoted property.
How to fix it #
Remove the duplicate property declaration:
class Foo
{
public int $prop;
- public int $prop;
}
If using constructor promotion, remove the separate property declaration:
class Foo
{
- public int $prop;
-
public function __construct(
public int $prop,
) {}
}
Non-ignorable error #
This error cannot be ignored using @phpstan-ignore or the ignoreErrors configuration. Non-ignorable errors indicate code that would cause a crash or a fatal error at runtime, or a fundamental problem in the analysed code that must be addressed.