# `ui:radio` (string $name, mixed $value = null, array $attributes = [], array $options = [])

Built on top of `ui:input`.

The following attributes are assigned by this extension :

- `'class' => "ui-radio"` 
- `'type' => "radio"`

and will typically be rendered such as :
```html
<input class="ui-radio" type="radio" value="$value" name="$name">
```