mpdf / qrcode

QR code generating library with HTML/PNG/mPDF output possibilities

mPDF QR code library

QR code generating library with HTML/PNG/mPDF output possibilities.

This is based on QrCode library bundled with mPDF until v8.0, made by Laurent Minguet. It is provided under LGPL license.

Installation

$ composer require mpdf/qrcode

Usage

<?php

use Mpdf\QrCode\QrCode;
use Mpdf\QrCode\Output;

$qrCode = new QrCode('Lorem ipsum sit dolor');

// Save black on white PNG image 100 px wide to filename.png. Colors are RGB arrays.
$output = new Output\Png();
$data = $output->output($qrCode, 100, [255, 255, 255], [0, 0, 0]);
file_put_contents('filename.png', $data);

// Echo a SVG file, 100 px wide, black on white.
// Colors can be specified in SVG-compatible formats
$output = new Output\Svg();
echo $output->output($qrCode, 100, 'white', 'black');

// Echo an HTML table
$output = new Output\Html();
echo $output->output($qrCode);

qrcode's Issues

why when u generate qrcode xml tag utf-8

I found this bug

This is mPDF and PHP version and environment (server/fpm/cli etc) I am using

This is the PHP code snippet I use

<?php

This is the HTML/CSS code snippet I use

Can't install

When I try to install this package, in Apache+PHP-FPM 7.4, I get the following error (BTW, I am using AWS SDK PHP inside my project):

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for mpdf/qrcode ^1.1 -> satisfiable by mpdf/qrcode[v1.1.0].
    - Conclusion: remove paragonie/random_compat v9.99.100
    - Conclusion: don't install paragonie/random_compat v9.99.100
    - mpdf/qrcode v1.1.0 requires paragonie/random_compat ^1.4|^2.0|9.99.99 -> satisfiable by paragonie/random_compat[v1.4.0, v1.4.1, v1.4.2, v1.4.3, v2.0.0, v2.0.1, v2.0.10, v2.0.11, v2.0.12, v2.0.13, v2.0.14, v2.0.15, v2.0.16, v2.0.17, v2.0.18, v2.0.19, v2.0.2, v2.0.3, v2.0.4, v2.0.5, v2.0.6, v2.0.7, v2.0.8, v2.0.9, v9.99.99].
    - Can only install one of: paragonie/random_compat[v1.4.0, v9.99.100].
    - Can only install one of: paragonie/random_compat[v1.4.1, v9.99.100].
    - Can only install one of: paragonie/random_compat[v1.4.2, v9.99.100].
    - Can only install one of: paragonie/random_compat[v1.4.3, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.0, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.1, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.10, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.11, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.12, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.13, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.14, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.15, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.16, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.17, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.18, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.19, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.2, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.3, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.4, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.5, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.6, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.7, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.8, v9.99.100].
    - Can only install one of: paragonie/random_compat[v2.0.9, v9.99.100].
    - Can only install one of: paragonie/random_compat[v9.99.99, v9.99.100].
    - Installation request for paragonie/random_compat (locked at v9.99.100) -> satisfiable by paragonie/random_compat[v9.99.100].


Installation failed, reverting ./composer.json to its original content.

QR Code stripping multiple consecutive spaces from the entered code

I found this bug

Attempting to create a QR code with the value ETEX14 0001 (where there are 6 consecutive spaces) - the extra spaces are getting stripped and the resulting code is ETEX14 0001 - I have searched for where this is happening and not been able to find it or find any work-around. I have checked that I am able to read a QR code with the spaces correctly encoded by using a different tool to generate the QR code so I am reasonably sure the code is being "minified" somewhere in mPDF and excess spaces stripped out. I have not been able to find any option or configuration change that will stop this happening despite searching for several hours and attempting many configuration changes. I apologize if this is a configuration issue and not a bug, but I have not been able to get this working.

This is mPDF and PHP version and environment (server/fpm/cli etc) I am using

Using mpdf/mpdf V8.0.10, mpdf/qrcode V1.2.0 running under PHP 7.4 on Apache V2.4.41

This is the PHP code snippet I use

<?php

    // Require composer autoload - create $mpdf object
    require_once $_SERVER['DOCUMENT_ROOT'].'/vendor/autoload.php';
    $mpdf = new \Mpdf\Mpdf([
        'format' => 'A4-P',
        'mode' => 'utf-8',
        'margin_left' => 0,
        'margin_right' => 0,
        'margin_top' => 0,
        'margin_bottom' => 0,
        'margin_header' => 0,
        'margin_footer' => 0,
        'nonPrintMargin' => 4
    ]);  //MPDF8

//Create HTML page in variable $html...(not shown)

$Location = 'EX14';
$BarcodeLocation = 'ET' . str_pad($Location, 10, " ", STR_PAD_RIGHT) . '0001';
$html .= "<barcode code=\"$BarcodeLocation\" type=\"QR\" class=\"barcode\" size=\"0.3\" error=\"M\" disableborder=\"1\" />\n";

//much later...
$mpdf->WriteHTML(trim($html),\Mpdf\HTMLParserMode::DEFAULT_MODE);
$mpdf->Output("Int_Doc_A4_Labels.pdf", "I");

This is the HTML/CSS code snippet I use

All is above...

Incorrect usage example in README.md file

This project seems unmaintained so I am posting bug report instead of PR for those who want still to use this library.

---

Example usage shown in project README.md is incorrect. The last argument passed to output() is NOT target file name but image compression level. It can be omitted for default value (or you can pass whatever imagepng() allows). The output() method returns PNG image so if you want to save it to the file, proper code looks like this (I also made it less compact or readability):

<?php

use Mpdf\QrCode\QrCode;
use Mpdf\QrCode\Output;

$qrCode = new QrCode('Lorem ipsum sit dolor');
$output = new Output\Png();

// Save black on white PNG image 100px wide to filename.png
$qrWidth = 100;
$bgColor = [255, 255, 255];
$fgColor = [0, 0, 0];
$qrImg = $output->output($qrCode, $qrWidth, $bgColor, $fgColor);
file_put_contents('filename.png', $qrImg);

How to save to filename.png?

The example will not work

// Save black on white PNG image 100px wide to filename.png
$output->output($qrCode, 100, [255, 255, 255], [0, 0, 0], 'filename.png');

The position for filename is in reality for int $compression