# orderNumber

> Builds the number each order page is titled with.

- Read more: <https://merx2.wagnerwagner.de/guide/configuration/order-number.md>
- Source: `config/config.php#L27` <https://github.com/wagnerwagner/merx/blob/2.0.0-alpha.11/config/config.php#L27>

```php
'wagnerwagner.merx.orderNumber' => function (OrderPage $virtualOrderPage): int {},
```

## Parameters

| Name | Type | Default |
| --- | --- | --- |
| `$virtualOrderPage` | `Wagnerwagner\Merx\OrderPage` | `–` |

## Default value

```php
function (OrderPage $virtualOrderPage): int {
	$lastOrder = $virtualOrderPage->siblings()->listed()->last();
	return ($lastOrder?->orderNumber()->toInt() ?? 0) + 1;
}
```

## Type

`function`