MadelineProto/old_docs/API_docs_v57/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 |
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|----------|---------------|----------|
|text|[string](../types/string.md) | Yes|
|data|[bytes](../types/bytes.md) | Yes|
### Type: [KeyboardButton](../types/KeyboardButton.md)
### Example:
```
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$keyboardButtonCallback = ['_' => 'keyboardButtonCallback', 'text' => 'string', 'data' => 'bytes'];
```
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[PWRTelegram](https://pwrtelegram.xyz) json-encoded version:
```
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{"_": "keyboardButtonCallback", "text": "string", "data": "bytes"}
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```
Or, if you're into Lua:
```
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keyboardButtonCallback={_='keyboardButtonCallback', text='string', data='bytes'}
```