PHP Conference Nagoya 2025

ReflectionEnum::isBacked

(PHP 8 >= 8.1.0)

ReflectionEnum::isBackedDetermines if an Enum is a Backed Enum

Beschreibung

public ReflectionEnum::isBacked(): bool

A Backed Enum is one that has a native backing scalar equivalent, either a string or an int. Not all Enums are backed.

Parameter-Liste

Diese Funktion besitzt keine Parameter.

Rückgabewerte

true if the Enum has a backing scalar, false if not.

Beispiele

Beispiel #1 ReflectionEnum::isBacked() example

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

enum
BackedSuit: string
{
case
Hearts = 'H';
case
Diamonds = 'D';
case
Clubs = 'C';
case
Spades = 'S';
}

var_dump((new ReflectionEnum(Suit::class))->isBacked());
var_dump((new ReflectionEnum(BackedSuit::class))->isBacked());
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

bool(false)
bool(true)

Siehe auch

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