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Last Updated: 2023-08-28 18:12:17
By endroid
This library helps you generate QR codes in a jiffy. Makes use of bacon/bacon-qr-code to generate the matrix and khanamiryan/qrcode-detector-decoder for validating generated QR codes. Further extended with Twig extensions, generation routes, a factory and a Symfony bundle for easy installation and configuration. Different writers are provided to generate the QR code as PNG, SVG, EPS or in binary format.
Use Composer to install the library. Also make sure you have enabled and configured the GD extension if you want to generate images.
composer require endroid/qr-code
use Endroid\QrCode\Builder\Builder;
use Endroid\QrCode\Encoding\Encoding;
use Endroid\QrCode\ErrorCorrectionLevel\ErrorCorrectionLevelHigh;
use Endroid\QrCode\Label\Alignment\LabelAlignmentCenter;
use Endroid\QrCode\Label\Font\NotoSans;
use Endroid\QrCode\RoundBlockSizeMode\RoundBlockSizeModeMargin;
use Endroid\QrCode\Writer\PngWriter;
$result = Builder::create()
->writer(new PngWriter())
->writerOptions([])
->data('Custom QR code contents')
->encoding(new Encoding('UTF-8'))
->errorCorrectionLevel(new ErrorCorrectionLevelHigh())
->size(300)
->margin(10)
->roundBlockSizeMode(new RoundBlockSizeModeMargin())
->logoPath(__DIR__.'/assets/symfony.png')
->logoResizeToWidth(50)
->logoPunchoutBackground(true)
->labelText('This is the label')
->labelFont(new NotoSans(20))
->labelAlignment(new LabelAlignmentCenter())
->validateResult(false)
->build();
use Endroid\QrCode\Color\Color;
use Endroid\QrCode\Encoding\Encoding;
use Endroid\QrCode\ErrorCorrectionLevel\ErrorCorrectionLevelLow;
use Endroid\QrCode\QrCode;
use Endroid\QrCode\Label\Label;
use Endroid\QrCode\Logo\Logo;
use Endroid\QrCode\RoundBlockSizeMode\RoundBlockSizeModeMargin;
use Endroid\QrCode\Writer\PngWriter;
use Endroid\QrCode\Writer\ValidationException;
$writer = new PngWriter();
// Create QR code
$qrCode = QrCode::create('Life is too short to be generating QR codes')
->setEncoding(new Encoding('UTF-8'))
->setErrorCorrectionLevel(new ErrorCorrectionLevelLow())
->setSize(300)
->setMargin(10)
->setRoundBlockSizeMode(new RoundBlockSizeModeMargin())
->setForegroundColor(new Color(0, 0, 0))
->setBackgroundColor(new Color(255, 255, 255));
// Create generic logo
$logo = Logo::create(__DIR__.'/assets/symfony.png')
->setResizeToWidth(50)
->setPunchoutBackground(true)
;
// Create generic label
$label = Label::create('Label')
->setTextColor(new Color(255, 0, 0));
$result = $writer->write($qrCode, $logo, $label);
// Validate the result
$writer->validateResult($result, 'Life is too short to be generating QR codes');
// Directly output the QR code
header('Content-Type: '.$result->getMimeType());
echo $result->getString();
// Save it to a file
$result->saveToFile(__DIR__.'/qrcode.png');
// Generate a data URI to include image data inline (i.e. inside an <img> tag)
$dataUri = $result->getDataUri();
Some writers provide writer options. Each available writer option is can be found as a constant prefixed with WRITER_OPTION_ in the writer class.
PdfWriter
unit
: unit of measurement (default: mm)fpdf
: PDF to place the image in (default: new PDF)x
: image offset (default: 0)y
: image offset (default: 0)link
: a URL or an identifier returned by AddLink()
.PngWriter
compression_level
: compression level (0-9, default: -1 = zlib default)SvgWriter
block_id
: id of the block element for external reference (default: block)exclude_xml_declaration
: exclude XML declaration (default: false)exclude_svg_width_and_height
: exclude width and height (default: false)force_xlink_href
: forces xlink namespace in case of compatibility issues (default: false)WebPWriter
quality
: image quality (0-100, default: 80)You can provide any writer options like this.
use Endroid\QrCode\Writer\SvgWriter;
$builder->writerOptions([
SvgWriter::WRITER_OPTION_EXCLUDE_XML_DECLARATION => true
]);
If you use a barcode scanner you can have some troubles while reading the
generated QR codes. Depending on the encoding you chose you will have an extra
amount of data corresponding to the ECI block. Some barcode scanner are not
programmed to interpret this block of information. To ensure a maximum
compatibility you can use the ISO-8859-1
encoding that is the default
encoding used by barcode scanners (if your character set supports it,
i.e. no Chinese characters are present).
By default block sizes are rounded to guarantee sharp images and improve readability. However some other rounding variants are available.
margin (default)
: the size of the QR code is shrunk if necessary but the size
of the final image remains unchanged due to additional margin being added.enlarge
: the size of the QR code and the final image are enlarged when
rounding differences occur.shrink
: the size of the QR code and the final image are
shrunk when rounding differences occur.none
: No rounding. This mode can be used when blocks don't need to be rounded
to pixels (for instance SVG).The readability of a QR code is primarily determined by the size, the input
length, the error correction level and any possible logo over the image so you
can tweak these parameters if you are looking for optimal results. You can also
check $qrCode->getRoundBlockSize() value to see if block dimensions are rounded
so that the image is more sharp and readable. Please note that rounding block
size can result in additional padding to compensate for the rounding difference.
And finally the encoding (default UTF-8 to support large character sets) can be
set to ISO-8859-1
if possible to improve readability.
If you need to be extra sure the QR code you generated is readable and contains the exact data you requested you can enable the validation reader, which is disabled by default. You can do this either via the builder or directly on any writer that supports validation. See the examples above.
Please note that validation affects performance so only use it in case of problems.
The endroid/qr-code-bundle integrates the QR code library in Symfony for an even better experience.
Read the bundle documentation for more information.
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.
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.