MadelineProto/old_docs/API_docs_v55/constructors/keyboardButtonCallback.md

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---
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, ];
```
Or, if you're into Lua:
```
keyboardButtonCallback={_='keyboardButtonCallback', text=string, data=bytes, }
```