phpvms/app/Models/Enums/AircraftStatus.php

<?php

namespace App\Models\Enums;

use App\Interfaces\Enum;

/**
 * Class AircraftState
 * @package App\Models\Enums
 */
class AircraftStatus extends Enum
{
    public const STORED      = 0;
    public const ACTIVE      = 1;
    public const RETIRED     = 2;
    public const SCRAPPED    = 3;
    public const WRITTEN_OFF = 4;

    public static $labels = [
        AircraftStatus::STORED      => 'Stored',
        AircraftStatus::ACTIVE      => 'Active',
        AircraftStatus::RETIRED     => 'Retired',
        AircraftStatus::SCRAPPED    => 'Scrapped',
        AircraftStatus::WRITTEN_OFF => 'Written Off',
    ];

    public static $codes = [
        'S' => AircraftStatus::STORED,
        'A' => AircraftStatus::ACTIVE,
        'R' => AircraftStatus::RETIRED,
        'C' => AircraftStatus::SCRAPPED,
        'W' => AircraftStatus::WRITTEN_OFF,
    ];
}