ReflectionEnum
PHP Manual

ReflectionEnum::getBackingType

Gets the backing type of an Enum, if any

Description

public ReflectionNamedTypenull ReflectionEnum::getBackingType()

If the enumeration is a Backed Enum, this method will return an instance of ReflectionType for the backing type of the Enum. If it is not a Backed Enum, it will return null.

Parameters

This function has no parameters.

Return Values

An instance of ReflectionNamedType, or null if the Enum has no backing type.

Changelog

Version Description
8.2.0 The return type is now declared as ?ReflectionNamedType. Previously, ?ReflectionType was declared.

Examples

Example #1 ReflectionEnum::getBackingType example

<?php
enum Suit: string
{
    case Hearts = 'H';
    case Diamonds = 'D';
    case Clubs = 'C';
    case Spades = 'S';
}

$rEnum = new ReflectionEnum(Suit::class);

$rBackingType = $rEnum->getBackingType();

var_dump((string) $rBackingType);
?>

The above example will output:

string(6) "string"

See Also