Error Identifier: interface.duplicateEnumCase
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);
// This identifier is produced by the DuplicateDeclarationRule which uses the
// class type description as prefix. In practice, interfaces cannot have enum
// cases, so this identifier is unlikely to be encountered in valid PHP code.
// The rule applies uniformly to all class-like declarations.
enum Status
{
case Active;
case Active;
}
Why is it reported? #
The declaration contains the same enum case name more than once. PHP does not allow redeclaring an enum case within the same body. This will cause a fatal error at runtime.
While the interface. prefix suggests this applies to interfaces, this identifier is generated by a generic rule that prefixes the error with the class-like type description. Interfaces cannot have enum cases in valid PHP, so this error is primarily relevant to enums themselves (where the identifier would be enum.duplicateEnumCase).
How to fix it #
Remove the duplicate enum case or rename it:
<?php declare(strict_types = 1);
enum Status
{
case Active;
- case Active;
+ case Inactive;
}
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]