BackedEnum::tryFrom

(PHP 8 >= 8.1.0)

BackedEnum::tryFromMaps a scalar to an enum instance or null

Descripción

public static BackedEnum::tryFrom(int|string $value): ?static

The tryFrom() method translates a string or int into the corresponding Enum case, if any. If there is no matching case defined, it will return null.

Parámetros

value

The scalar value to map to an enum case.

Valores devueltos

A case instance of this enumeration, or null if not found.

Ejemplos

Ejemplo #1 Basic usage

The following example illustrates how enum cases are returned.

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

$h = Suit::tryFrom('H');

var_dump($h);

$b = Suit::tryFrom('B') ?? Suit::Spades;

var_dump($b);
?>

El resultado del ejemplo sería:

enum(Suit::Hearts)
enum(Suit::Spades)

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