(PHP 8 >= 8.1.0)
BackedEnum::tryFrom — Maps a scalar to an enum instance or null
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.
valueA case instance of this enumeration, or null if not found.
Example #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);
?>Il precedente esempio visualizzerà:
enum(Suit::Hearts) enum(Suit::Spades)