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BackedEnum::tryFrom

(PHP 8 >= 8.1.0)

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

Description

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.

Liste de paramètres

value

The scalar value to map to an enum case.

Valeurs de retour

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

Exemples

Exemple #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);
?>

L'exemple ci-dessus va afficher :

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

Voir aussi

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