QR Code

By endroid

This library based on QRcode Perl CGI & PHP scripts by Y. Swetake helps you generate images containing a QR code.

Installation

Use Composer to install the library.

$ composer require endroid/qrcode

Usage

use Endroid\QrCode\QrCode;

$qrCode = new QrCode();
$qrCode
    ->setText('Life is too short to be generating QR codes')
    ->setSize(300)
    ->setPadding(10)
    ->setErrorCorrection('high')
    ->setForegroundColor(['r' => 0, 'g' => 0, 'b' => 0, 'a' => 0])
    ->setBackgroundColor(['r' => 255, 'g' => 255, 'b' => 255, 'a' => 0])
    ->setLabel('Scan the code')
    ->setLabelFontSize(16)
    ->setImageType(QrCode::IMAGE_TYPE_PNG)
;

// now we can directly output the qrcode
header('Content-Type: '.$qrCode->getContentType());
$qrCode->render();

// save it to a file
$qrCode->save('qrcode.png');

// or create a response object
$response = new Response($qrCode->get(), 200, ['Content-Type' => $qrCode->getContentType()]);

Symfony integration

Register the Symfony bundle in the kernel.

// app/AppKernel.php

public function registerBundles()
{
    $bundles = [
        // ...
        new Endroid\QrCode\Bundle\EndroidQrCodeBundle(),
    ];
}

The default parameters can be overridden via the configuration.
Alpha channel available range is [0, 127] in foreground and background colors.

endroid_qr_code:
    size: 100
    padding: 10
    extension: gif
    error_correction_level: high
    foreground_color: { r: 0, g: 0, b: 0, a: 0 }
    background_color: { r: 255, g: 255, b: 255, a: 0 }
    label: 'My label'
    label_font_size: 16

Now you can retrieve the factory as follows.

$factory = $this->get('endroid.qrcode.factory');
$factory->createQrCode();

Add the following section to your routing to be able to handle QR code URLs. This step can be skipped when you only use data URIs to display your images.

EndroidQrCodeBundle:
    resource: "@EndroidQrCodeBundle/Controller/"
    type:     annotation
    prefix:   /qrcode

After installation and configuration, QR codes can be generated by appending the QR code text to the url as mounted, followed by .png, .jpg or .gif.

Twig extension

The bundle also provides a Twig extension for quickly generating QR code urls. Optional parameters are extension, size, padding and errorCorrectionLevel. When a parameter is omitted, the value in the bundle configuration is used.

<img src="{{ qrcode_url(message) }}" />
<img src="{{ qrcode_url(message, { extension: 'png' }) }}" />
<img src="{{ qrcode_url(message, { size: 150 }) }}" />

You can also use the data URI helper to embed the QR code within your HTML instead of requiring a separate HTTP request to load your image.

<img src="{{ qrcode_data_uri(message, { size: 200, padding: 10 }) }}" />

Versioning

Version numbers follow the MAJOR.MINOR.PATCH scheme. Backwards compatibility breaking changes will be kept to a minimum but be aware that these can occur. Lock your dependencies for production and test your code when upgrading.

License

This bundle is under the MIT license. For the full copyright and license information please view the LICENSE file that was distributed with this source code.