use CuyZ\MagicConstant\MagicConstant;

class ContractStatus extends MagicConstant
{
    protected const ACTIVE = [
        self::FORMAT_SERVICE_A => 'active',
        self::FORMAT_SERVICE_B => 10,
    ];

    // Others status...

    public const FORMAT_SERVICE_A = 'a';
    public const FORMAT_SERVICE_B = 'b';
}

// Instead of doing this:
if ($status === 'active' || $status === 10) {
    //
}

// You can do this:
if ($status->equals(ContractStatus::ACTIVE())) {
    //
}

use CuyZ\MagicConstant\MagicConstant;

/**
 * You can declare static methods to help with autocompletion:
 *
 * @method static Example FOO()
 * @method static Example BAR()
 * @method static Example FIZ()
 */
class Example extends MagicConstant
{
    // Only protected constants are used as keys
    protected const FOO = 'foo';

    // A key can have multiple possible formats for it's value
    protected const BAR = ['bar', 'BAR', 'b'];

    // You can use an associative array to declare formats
    protected const FIZ = [
        self::FORMAT_LOWER => 'fiz',
        self::FORMAT_UPPER => 'FIZ',
    ];

    // Using constants for formats is not mandatory
    public const FORMAT_LOWER = 'lower';
    public const FORMAT_UPPER = 'upper';
}

// As a parameter typehint and/or a return typehint
function hello(Example $example): Example {
    //
}

hello(new Example('foo'));

// You can also use constants keys as a static method
hello(Example::BAR());

echo (new Example('foo'))->getValue(); // 'foo'

// You can specify the desired output format
echo (new Example('FIZ'))->getValue(Example::FORMAT_LOWER); // 'fiz'

$constant = new Example('b');

echo $constant->getKey(); // 'BAR'

$constant = new Example('fiz');

echo $constant->getAllFormats(); // [new Example('fiz'), new Example('FIZ')]

$constant = new Example('BAR');

echo $constant->getAllValues(); // ['bar', 'BAR', 'b']

$constant = new Example('BAR');

echo $constant->normalize(); // new Example('bar')

(new Example('foo'))->equals(new Exemple('bar')); // false
(new Example('foo'))->equals(null); // false

(new Example('fiz'))->equals(new Exemple('FIZ')); // true
(new Example('b'))->equals(new Exemple('b')); // true

$constant = new Example('foo');

$constant->in([new Exemple('bar'), null, 'foo']); // false
$constant->in([new Exemple('foo'), null, 'foo']); // true

Example::keys(); // ['FOO', 'BAR', 'FIZ']

Example::values();

[
    'FOO' => new Example('foo'),
    'BAR' => new Example('bar'),
    'FIZ' => new Example('fiz'),
];

// You can specify a regex pattern to match certain keys
Example::values('/^F(.+)/');

[
    'FOO' => new Example('foo'),
    'FIZ' => new Example('fiz'),
];

Example::toArray();

[
    'FOO' => ['foo'],
    'BAR' => ['bar', 'BAR', 'b'],
    'FIZ' => ['fiz', 'FIZ'],
];

Example::isValidValue('foo'); // true
Example::isValidValue('hello'); // false

Example::isValidKey('BAR'); // true
Example::isValidKey('HELLO'); // false

Example::search('foo'); // 'FOO'
Example::search('b'); // 'BAR'
Example::search('hello'); // false