ReflectionEnum
PHP Manual

ReflectionEnum::isBacked

Determines if an Enum is a Backed Enum

Description

public bool ReflectionEnum::isBacked()

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

Parameters

This function has no parameters.

Return Values

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

Examples

Example #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());
?>

The above example will output:

bool(false)
bool(true)

See Also