---
title: "CallbackRenderer – API-Referenz · Quittio"
description: "Own rendering function (e.g. Browsershot, Gotenberg) that returns PDF binary data. PDF/A and the embedded XML are added by the post processor."
canonical_url: "https://quittio.dev/docs/api/Quittio/Core/Pdf/Renderers/CallbackRenderer"
locale: de
meta:
  "og:description": "Own rendering function (e.g. Browsershot, Gotenberg) that returns PDF binary data. PDF/A and the embedded XML are added by the post processor."
  "og:image": "https://quittio.dev/og/quittio-de.jpg"
  "og:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
  "og:image:height": "630"
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  "og:title": "CallbackRenderer – API-Referenz · Quittio"
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  "twitter:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
---

> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Core](https://quittio.dev/docs/api/Quittio/Core) \\ [Pdf](https://quittio.dev/docs/api/Quittio/Core/Pdf) \\ [Renderers](https://quittio.dev/docs/api/Quittio/Core/Pdf/Renderers)

# CallbackRenderer

final class in quittio/core · implements [`PdfRenderer`](https://quittio.dev/docs/api/Quittio/Core/Pdf/PdfRenderer)

`Quittio\Core\Pdf\Renderers\CallbackRenderer` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Pdf/Renderers/CallbackRenderer.php#L18)

Own rendering function (e.g. Browsershot, Gotenberg) that returns PDF binary data. PDF/A and the embedded XML are added by the post processor.

## Methods \#

| Method | Description |
| --- | --- |
| `->__construct()` | |
| `->render()` | |
| `->supportsEmbedding()` | PDF/A and the embedded XML are added by the post processor of this renderer. |

### `__construct()`#

```
public function __construct(
    Closure $callback,
    PdfPostProcessor $postProcessor = new \Quittio\Core\Pdf\PostProcessing\MpdfPostProcessor(),
)
```

| Parameter | Type | Description |
| --- | --- | --- |
| `$callback` | `Closure` | |
| `$postProcessor` | `[PdfPostProcessor](https://quittio.dev/docs/api/Quittio/Core/Pdf/PostProcessing/PdfPostProcessor)` = `new \Quittio\Core\Pdf\PostProcessing\MpdfPostProcessor()` | |

### `render()`#

```
public function render(RenderRequest $request): string
```

| Parameter | Type | Description |
| --- | --- | --- |
| `$request` | `[RenderRequest](https://quittio.dev/docs/api/Quittio/Core/Pdf/RenderRequest)` | |

<dl><dt>Returns</dt>
<dd><code>string</code></dd>
</dl>

### `supportsEmbedding()`#

```
public function supportsEmbedding(): bool
```

PDF/A and the embedded XML are added by the post processor of this renderer.

<dl><dt>Returns</dt>
<dd><code>bool</code></dd>
</dl>

```json
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```