The BackedEnum interface
Introduction
(PHP 8 >= 8.1.0)
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}
Table of Contents
- BackedEnum::from — Maps a scalar to an enum instance
- BackedEnum::tryFrom — Maps a scalar to an enum instance or null
© 1997–2021 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/class.backedenum.php
