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# Callback

This block type calls a custom function and renders its output.

### Parameters

* **callback** - callable function name;
* **params** - an array of function arguments;
* **return** - set to `true` if the function returns the result instead of echoing it.

### Example

The code below renders the WordPress site title. It calls the WordPress [get\_bloginfo](https://developer.wordpress.org/reference/functions/get_bloginfo/) function with the `show` parameter set to "name". The `return` block parameter is set to `true` because this function returns the result instead of echoing it.

```php
echo ( new HivePress\Blocks\Callback(
	[
		'callback' => 'get_bloginfo',
		'params'   => [ 'name' ],
		'return'   => true,
	]
) )->render();
```