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

    interface BackedEnum extends UnitEnum {
    /* Methods */
    public static from(int|string $value): static
    public static tryFrom(int|string $value): ?static
    /* Inherited methods */
    public static UnitEnum::cases(): array
    }

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