Error Identifier: enum.duplicateMethod
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';
public function label(): string
{
return $this->value;
}
public function label(): string
{
return strtoupper($this->value);
}
}
Why is it reported? #
An enum declares the same method more than once. PHP does not allow two methods with the same name in a single enum. This is a fatal error.
In the example above, the method label() is declared twice in the enum Suit.
How to fix it #
Remove the duplicate method declaration, keeping only one:
<?php declare(strict_types = 1);
enum Suit: string
{
case Hearts = 'hearts';
public function label(): string
{
- return $this->value;
- }
-
- public function label(): string
- {
return strtoupper($this->value);
}
}
If the duplicate methods were intended to have different behaviour, rename one of them:
<?php declare(strict_types = 1);
enum Suit: string
{
case Hearts = 'hearts';
public function label(): string
{
return $this->value;
}
- public function label(): string
+ public function upperLabel(): string
{
return strtoupper($this->value);
}
}
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.
Rules that report this error #
- PHPStan\Rules\Classes\DuplicateDeclarationRule [1]