PHP: Enumeration constants

Enumeration constants

Enumerations may include constants, which may be public, private, or protected, although in practice private and protected are equivalent as inheritance is not allowed.

An enum constant may refer to an enum case:

<?php

enum Size
{
    case Small;
    case Medium;
    case Large;

    public const Huge = self::Large;
}
?>

Found A Problem?

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

＋add a note

User Contributed Notes 1 note

down

Hayley Watson ¶

1 year ago

Just to clarify, enum constants *can* contain cases, but they don't *have* to; other constant values are legitimate - including cases of other Enumerations.

<?php
enum Suit
{
    case Hearts;
    case Clubs;
    case Spades;
    case Diamonds;

    public const Card = Size::Large; // A case from a different enum
}

enum Size
{
    case Small;
    case Medium;
    case Large;

    public const Scale = 297/210; // A float
}

echo Suit::Diamonds::Card::Scale; // Getting the constant Scale from the constant Card in a Suit.
?>

＋add a note

Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.

Enumeration constants

Found A Problem?

User Contributed Notes 1 note

Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.