# The BackedEnum interface

(PHP 8 >= 8.1.0)

## Introducción

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.

## Sinopsis de la Interfaz

interface BackedEnum extends UnitEnum {
/* Métodos */
public static from(int|string `$value`): static
public static tryFrom(int|string `$value`): ?static
/* Métodos heredados */
public static UnitEnum::cases(): array
}

## Tabla de contenidos

- BackedEnum::from — Maps a scalar to an enum instance
- BackedEnum::tryFrom — Maps a scalar to an enum instance or null