MadelineProto/old_docs/API_docs_v57/constructors/keyboardButtonCallback.md

---
title: keyboardButtonCallback
description: keyboardButtonCallback attributes, type and example
---
## Constructor: keyboardButtonCallback  
[Back to constructors index](index.md)



### Attributes:

| Name     |    Type       | Required |
|----------|:-------------:|---------:|
|text|[string](../types/string.md) | Yes|
|data|[bytes](../types/bytes.md) | Yes|



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


### Example:

```
$keyboardButtonCallback = ['_' => 'keyboardButtonCallback', 'text' => string, 'data' => bytes, ];
```  

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

```
{"_":"keyboardButtonCallback","text":"string","data":"bytes"}
```


Or, if you're into Lua:  


```
keyboardButtonCallback={_='keyboardButtonCallback', text=string, data=bytes, }

```