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Example code of xsuchy09/php-qrcode

Informations about the package php-qrcode

xsuchy09/php-qrcode

Fork from chillerlan/php-qrcode.

A PHP7.2+ QR Code library based on the implementation by Kazuhiko Arase, namespaced, cleaned up, improved and other stuff.

Packagist version License Travis CI

Documentation

Requirements

Installation

requires composer

Just run:

Or edit your composer.json (note: replace dev-master with a version boundary)

Manual installation

Download the desired version of the package from master or release and extract the contents to your project folder. After that:

Profit!

Usage

We want to encode this URI for a mobile authenticator into a QRcode image:

QR codes are awesome! QR codes are awesome!

Wait, what was that? Please again, slower!

Advanced usage

Ok, step by step. First you'll need a QRCode instance, which can be optionally invoked with a QROptions (or a SettingsContainerInterface, respectively) object as the only parameter.

In case you just want the raw QR code matrix, call QRCode::getMatrix() - this method is also called internally from QRCode::render(). See also Custom output modules.

Have a look in this folder for some more usage examples.

Custom module values

Previous versions of QRCode held only boolean matrix values that only allowed to determine whether a module was dark or not. Now you can distinguish between different parts of the matrix, namely the several required patterns from the QR Code specification, and use them in different ways.

The dark value is the module (light) value shifted by 8 bits to the left: $value = $M_TYPE << ($bool ? 8 : 0);, where $M_TYPE is one of the QRMatrix::M_* constants. You can check the value for a type explicitly like...

...or you can perform a loose check, ignoring the module value

See also QRMatrix::set(), QRMatrix::check() and QRMatrix constants.

To map the values and properly render the modules for the given QROutputInterface, it's necessary to overwrite the default values:

Custom QROutputInterface

Instead of bloating your code you can simply create your own output interface by extending QROutputAbstract. Have a look at the built-in output modules.

In case you need additional settings for your output module, just extend QROptions...

...or use the SettingsContainerInterface, which is the more flexible approach.

set the options:

You can then call QRCode with the custom modules...

...or invoke the QROutputInterface manually.

API

QRCode methods

method return description
__construct(QROptions $options = null) - see SettingsContainerInterface
render(string $data, string $file = null) mixed, QROutputInterface::dump() renders a QR Code for the given $data and QROptions, saves $file optional
getMatrix(string $data) QRMatrix returns a QRMatrix object for the given $data and current QROptions
initDataInterface(string $data) QRDataInterface returns a fresh QRDataInterface for the given $data
isNumber(string $string) bool checks if a string qualifies for Number
isAlphaNum(string $string) bool checks if a string qualifies for AlphaNum
isKanji(string $string) bool checks if a string qualifies for Kanji

QRCode constants

name description
VERSION_AUTO QROptions::$version
MASK_PATTERN_AUTO QROptions::$maskPattern
OUTPUT_MARKUP_SVG, OUTPUT_MARKUP_HTML QROptions::$outputType markup
OUTPUT_IMAGE_PNG, OUTPUT_IMAGE_JPG, OUTPUT_IMAGE_GIF QROptions::$outputType image
OUTPUT_STRING_JSON, OUTPUT_STRING_TEXT QROptions::$outputType string
OUTPUT_IMAGICK QROptions::$outputType ImageMagick
OUTPUT_CUSTOM QROptions::$outputType, requires QROptions::$outputInterface
ECC_L, ECC_M, ECC_Q, ECC_H, ECC-Level: 7%, 15%, 25%, 30% in QROptions::$eccLevel
DATA_NUMBER, DATA_ALPHANUM, DATA_BYTE, DATA_KANJI QRDataInterface::$datamode

QROptions properties

property type default allowed description
$version int QRCode::VERSION_AUTO 1...40 the QR Code version number
$versionMin int 1 1...40 Minimum QR version (if $version = QRCode::VERSION_AUTO)
$versionMax int 40 1...40 Maximum QR version (if $version = QRCode::VERSION_AUTO)
$eccLevel int QRCode::ECC_L QRCode::ECC_X Error correct level, where X = L (7%), M (15%), Q (25%), H (30%)
$maskPattern int QRCode::MASK_PATTERN_AUTO 0...7 Mask Pattern to use
$addQuietzone bool true - Add a "quiet zone" (margin) according to the QR code spec
$quietzoneSize int 4 clamped to 0 ... $matrixSize / 2 Size of the quiet zone
$outputType string QRCode::OUTPUT_IMAGE_PNG QRCode::OUTPUT_* built-in output type
$outputInterface string null * FQCN of the custom QROutputInterface if QROptions::$outputType is set to QRCode::OUTPUT_CUSTOM
$cachefile string null * optional cache file path
$eol string PHP_EOL * newline string (HTML, SVG, TEXT)
$scale int 5 * size of a QR code pixel (SVG, IMAGE_*), HTML -> via CSS
$cssClass string null * a common css class
$svgOpacity float 1.0 0...1
$svgDefs string * * anything between <defs>
$svgViewBoxSize int null * a positive integer which defines width/height of the viewBox attribute
$textDark string '🔴' * string substitute for dark
$textLight string '⭕' * string substitute for light
$markupDark string '#000' * markup substitute for dark (CSS value)
$markupLight string '#fff' * markup substitute for light (CSS value)
$imageBase64 bool true - whether to return the image data as base64 or raw like from file_get_contents()
$imageTransparent bool true - toggle transparency (no jpeg support)
$imageTransparencyBG array [255, 255, 255] [R, G, B] the RGB values for the transparent color, see imagecolortransparent()
$pngCompression int -1 -1 ... 9 imagepng() compression level, -1 = auto
$jpegQuality int 85 0 - 100 imagejpeg() quality
$imagickFormat string 'png' * ImageMagick output type, see Imagick::setType()
$imagickBG string null * ImageMagick background color, see ImagickPixel::__construct()
$moduleValues array null * Module values map, see Custom output modules and QROutputInterface::DEFAULT_MODULE_VALUES

QRMatrix methods

method return description
__construct(int $version, int $eclevel) - -
matrix() array the internal matrix representation as a 2 dimensional array
version() int the current QR Code version
eccLevel() int current ECC level
maskPattern() int the used mask pattern
size() int the absoulute size of the matrix, including quiet zone (if set). $version * 4 + 17 + 2 * $quietzone
get(int $x, int $y) int returns the value of the module
set(int $x, int $y, bool $value, int $M_TYPE) QRMatrix sets the $M_TYPE value for the module
check(int $x, int $y) bool checks whether a module is true (dark) or false (light)

QRMatrix constants

name light (false) dark (true) description
M_NULL 0 - module not set (should never appear. if so, there's an error)
M_DARKMODULE - 512 once per matrix at $xy = [8, 4 * $version + 9]
M_DATA 4 1024 the actual encoded data
M_FINDER 6 1536 the 7x7 finder patterns
M_SEPARATOR 8 - separator lines around the finder patterns
M_ALIGNMENT 10 2560 the 5x5 alignment patterns
M_TIMING 12 3072 the timing pattern lines
M_FORMAT 14 3584 format information pattern
M_VERSION 16 4096 version information pattern
M_QUIETZONE 18 - margin around the QR Code
M_LOGO 20 - space for a logo image (not used yet)
M_TEST 255 65280 test value

Notes

The QR encoder, especially the subroutines for mask pattern testing, can cause high CPU load on increased matrix size. You can avoid a part of this load by choosing a fast output module, like OUTPUT_IMAGE_* and setting the mask pattern manually (which may result in unreadable QR Codes). Oh hey and don't forget to sanitize any user input!

Disclaimer!

I don't take responsibility for molten CPUs, misled applications, failed log-ins etc.. Use at your own risk!

Trademark Notice

The word "QR Code" is registered trademark of DENSO WAVE INCORPORATED
http://www.denso-wave.com/qrcode/faqpatent-e.html

All versions of php-qrcode with dependencies

PHP Build Version
Package Version
Requires php Version ^7.2
ext-gd Version *
ext-json Version *
ext-mbstring Version *
chillerlan/php-settings-container Version ^1.1
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