PHP code example of ryunosuke / polyfill-enum

1. Go to this page and download the library: Download ryunosuke/polyfill-enum library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

ryunosuke / polyfill-enum example snippets


enum Suit1
{
    use Magicable; // explain later

    const SIMPLE_CONST = null;

    private const OTHER_CONST = null;

    case Hearts;
    case Diamonds;
    case Clubs;
    case Spades;
}
var_dump(count(Suit1::cases())); // int(4)

enum Suit2: int
{
    use Magicable; // explain later

    const SIMPLE_CONST = 0;

    const OTHER_CONST = '';

    case Hearts   = 1;
    case Diamonds = 2;
    case Clubs    = 3;
    case Spades   = 4;
}
var_dump(count(Suit2::cases())); // int(4)

enum Suit3: string
{
    use Magicable; // explain later

    const SIMPLE_CONST = '';

    const OTHER_CONST = 0;

    case Hearts   = 'H';
    case Diamonds = 'D';
    case Clubs    = 'C';
    case Spades   = 'S';
}
var_dump(count(Suit3::cases())); // int(4)


class Suit1 extends PureEnum
{
    #[EnumCase(false)]
    const SIMPLE_CONST = null; // This is not a case (because EnumCase attribute).

    private const OTHER_CONST = null; // This is not a case (because it is not public).

    const Hearts   = null;
    const Diamonds = null;
    const Clubs    = null;
    const Spades   = null;
}
var_dump(count(Suit1::cases())); // int(4)

class Suit2 extends IntBackedEnum
{
    #[EnumCase(false)]
    const SIMPLE_CONST = 0; // This is not a case (because EnumCase attribute).

    const OTHER_CONST = ''; // This is not a case (because it is not int).

    const Hearts   = 1;
    const Diamonds = 2;
    const Clubs    = 3;
    const Spades   = 4;
}
var_dump(count(Suit2::cases())); // int(4)

class Suit3 extends StringBackedEnum
{
    #[EnumCase(false)]
    const SIMPLE_CONST = ''; // This is not a case (because EnumCase attribute).

    const OTHER_CONST = 0; // This is not a case (because it is not string).

    const Hearts   = 'H';
    const Diamonds = 'D';
    const Clubs    = 'C';
    const Spades   = 'S';
}
var_dump(count(Suit3::cases())); // int(4)

sh
# Below are the same results
php80 demo/php80-polyfill.php
php81 demo/php81-builtin.php