(PHP 8 >= 8.1.0)
UnitEnum::cases — Generates a list of cases on an enum
This method will return a packed array of all cases in an enumeration, in lexical order.
This function has no parameters.
An array of all defined cases of this enumeration, in lexical order.
Example #1 Basic usage
The following example illustrates how enum cases are returned.
<?php
enum Suit
{
    case Hearts;
    case Diamonds;
    case Clubs;
    case Spades;
}
var_dump(Suit::cases());
?>
The above example will output:
array(4) {
    [0]=>
    enum(Suit::Hearts)
    [1]=>
    enum(Suit::Diamonds)
    [2]=>
    enum(Suit::Clubs)
    [3]=>
    enum(Suit::Spades)
}