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@ 2016-01-23T03:52:40Z

<?php
declare(strict_types = 1);

namespace App
{
    class Status
    {
        const ACTIVE   = 1;
        const INACTIVE = 2;
        const SOLD     = 3;

        private $value;

        private $labels = [
            self::ACTIVE   => 'Active',
            self::INACTIVE => 'Inactive',
            self::SOLD     => 'Sold',
        ];

        /**
         * Status constructor.
         * @param $value
         */
        public function __construct(int $value)
        {
            if (!in_array($value, array_keys($this->labels))) {
                throw new \InvalidArgumentException('Invalid status');
            }

            $this->value = $value;
        }

        public function __toString()
        {
            return $this->labels[$this->value];
        }
    }

    class Product
    {
        private $id;
        private $name;
        private $status;

        /**
         * Product constructor.
         * @param $id
         * @param $name
         * @param $status
         */
        public function __construct(int $id, string $name, Status $status)
        {
            $this->id = $id;
            $this->name = $name;
            $this->status = $status;
        }
    }

    $status = new Status(Status::SOLD);
    var_dump(new Product(1, 'Chess board', $status));
    echo "\n\n\n\n{$status}";
}

Output for git.master, git.master_jit, rfc.property-hooks: object(App\Product)#2 (3) { ["id":"App\Product":private]=> int(1) ["name":"App\Product":private]=> string(11) "Chess board" ["status":"App\Product":private]=> object(App\Status)#1 (2) { ["value":"App\Status":private]=> int(3) ["labels":"App\Status":private]=> array(3) { [1]=> string(6) "Active" [2]=> string(8) "Inactive" [3]=> string(4) "Sold" } } } Sold

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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