---
title: optionEmpty
description: Unknown option or option having default value
---
## Constructor: optionEmpty  
[Back to constructors index](index.md)



Unknown option or option having default value

### Attributes:

| Name     |    Type       | Required | Description |
|----------|---------------|----------|-------------|



### Type: [OptionValue](../types/OptionValue.md)


### Example:

```
$optionEmpty = ['_' => 'optionEmpty'];
```  

[PWRTelegram](https://pwrtelegram.xyz) json-encoded version:

```
{"_": "optionEmpty"}
```


Or, if you're into Lua:  


```
optionEmpty={_='optionEmpty'}

```