[PHP-NOTES] note 130451 added to language.enumerations.static-methods

A simple order status example

<?php
define('select_option', '请选择');
define('order_success', '成功');
define('order_failed', '失败');
define('order_pending', '待支付');

function lang($key, $default='')
{
	return defined($key) ? constant($key) : $default;
}

// 订单状态示例
enum OrderStatus: string
{
    case pending = '200';
    case success = '201';
    case failed = '202';
    
    /**
     * 这里可本地化
     */
    public function label(): string
    {
        return match($this) {
            self::success => lang('order_success'),
            self::failed => lang('order_failed'),
            self::pending => lang('order_pending'),
        };
    }
    
    public static function forSelect(array $option = [], string $default = ''): array
    {
        $options = array_map(fn($status) => [
            'label' => $status->label(),
            'value' => $status->value,
            'default' => ($status->value === $default)
        ], self::cases());
        return array_merge([$option], $options);
    }

    public function isSuccess(): bool
    {
        return $this === self::success;
    }
}

var_export(OrderStatus::forSelect(['label'=>lang('select_option'), 'value'=>''], '201')); // array
var_export(OrderStatus::success->name); // 'success'
var_export(OrderStatus::success->value); // '201'
var_export(OrderStatus::success->label()); // '成功'
var_export(OrderStatus::from('201')->label()); // '成功'

$orderStatus = OrderStatus::from('201');
var_export($orderStatus->isSuccess()); // bool(true)
?>
----
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----
Manual Page -- https://php.net/manual/en/language.enumerations.static-methods.php
Edit        -- https://main.php.net/note/edit/130451
Del: integrated  -- https://main.php.net/note/delete/130451/integrated
Del: useless     -- https://main.php.net/note/delete/130451/useless
Del: bad code    -- https://main.php.net/note/delete/130451/bad+code
Del: spam        -- https://main.php.net/note/delete/130451/spam
Del: non-english -- https://main.php.net/note/delete/130451/non-english
Del: in docs     -- https://main.php.net/note/delete/130451/in+docs
Del: other reasons-- https://main.php.net/note/delete/130451
Reject      -- https://main.php.net/note/reject/130451
Search      -- https://main.php.net/manage/user-notes.php