MadelineProtoDocs/old_docs/API_docs_v66/constructors/keyboardButtonCallback.md

---
title: keyboardButtonCallback
description: keyboardButtonCallback attributes, type and example
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
---
# 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", "bytes":"base64 encoded bytes"}}
```


Or, if you're into Lua:  


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

```