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# QRFpdf
[Class `QRFpdf`](https://github.com/chillerlan/php-qrcode/blob/main/src/Output/QRFpdf.php):
[Portable Document Format](https://en.wikipedia.org/wiki/PDF) (PDF) output via [FPDF](https://github.com/setasign/fpdf).
## Example
See: [FPDF example](https://github.com/chillerlan/php-qrcode/blob/main/examples/fpdf.php)
Set the options:
```php
$options = new QROptions;
$options->outputInterface = QRFpdf::class;
$options->scale = 5;
$options->fpdfMeasureUnit = 'mm'; // pt, mm, cm, in
$options->bgColor = [222, 222, 222]; // [R, G, B]
$options->drawLightModules = false;
$options->moduleValues = [
QRMatrix::M_FINDER_DARK => [0, 63, 255], // dark (true)
QRMatrix::M_FINDER_DOT => [0, 63, 255], // finder dot, dark (true)
QRMatrix::M_FINDER => [255, 255, 255], // light (false)
QRMatrix::M_ALIGNMENT_DARK => [255, 0, 255],
QRMatrix::M_ALIGNMENT => [255, 255, 255],
QRMatrix::M_DATA_DARK => [0, 0, 0],
QRMatrix::M_DATA => [255, 255, 255],
];
```
Render the output:
```php
$data = 'https://www.youtube.com/watch?v=dQw4w9WgXcQ';
$out = new QRCode($options)->render($data); // -> data:application/pdf;base64,...
echo $out;
```
Return the `FPDF` instance (will ignore other output options):
```php
$options->returnResource = true;
/** @var \FPDF $fpdf */
$fpdf = new QRCode($options)->render($data);
// do stuff with the FPDF instance...
// ...dump output
header('application/pdf');
echo $fpdf->Output('S');
```
## Additional methods
| method | return | description |
|---------------------------------------------------|--------|------------------------------|
| (protected) `initFPDF()` | `FPDF` | Initializes an FPDF instance |
| (protected) `module(int $x, int $y, int $M_TYPE)` | `void` | Renders a single module |
## Options that affect this class
| property | type |
|---------------------|----------|
| `$bgColor` | `array` |
| `$drawLightModules` | `bool` |
| `$fpdfMeasureUnit` | `string` |
| `$outputBase64` | `bool` |
| `$returnResource` | `bool` |
| `$scale` | `ìnt` |