The BackedEnum interface

    (PHP 8 >= 8.1.0)

    Introduction

    The BackedEnum interface is automatically applied to backed enumerations by the engine. It may not be implemented by user-defined classes. Enumerations may not override its methods, as default implementations are provided by the engine. It is available only for type checks.

    Interface synopsis

    interfaceBackedEnumextendsUnitEnum {
    publicstaticfrom(int|string$value): static
    publicstatictryFrom(int|string$value): ?static
    publicstaticUnitEnum::cases(): array
    }

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