Pros of php-qrcode

• More extensive customization options for QR code generation
• Better performance for generating large numbers of QR codes
• Supports a wider range of output formats (PNG, GIF, JPG, SVG, etc.)

Cons of php-qrcode

• Steeper learning curve due to more complex API
• Requires more setup and configuration for basic usage
• Larger codebase, which may impact project size

Code Comparison

php-qrcode:

$qrcode = new QRCode(new QROptions([
    'version'    => 5,
    'outputType' => QRCode::OUTPUT_MARKUP_SVG,
    'eccLevel'   => QRCode::ECC_L,
]));
$qrcode->render('https://example.com');

qr-code:

$writer = new PngWriter();
$qrCode = QrCode::create('https://example.com')
    ->setEncoding(new Encoding('UTF-8'))
    ->setErrorCorrectionLevel(ErrorCorrectionLevel::Low)
    ->setSize(300);
$result = $writer->write($qrCode);

Both libraries offer robust QR code generation capabilities, but php-qrcode provides more advanced features and customization options at the cost of increased complexity. qr-code, on the other hand, offers a simpler API for basic QR code generation tasks, making it more accessible for beginners or projects with straightforward requirements.

Pros of jsQR

• Written in JavaScript, making it ideal for web-based applications
• Can decode QR codes directly from image data or video streams
• Lightweight and easy to integrate into existing web projects

Cons of jsQR

• Limited to QR code generation and scanning
• May have performance limitations for large-scale or high-speed applications
• Less actively maintained compared to qr-code

Code Comparison

qr-code (PHP):

$writer = new PngWriter();
$qrCode = QrCode::create('https://example.com')
    ->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));

jsQR (JavaScript):

const code = jsQR(imageData.data, imageData.width, imageData.height);
if (code) {
  console.log("Found QR code", code.data);
}

The code examples demonstrate the different approaches: qr-code focuses on QR code generation with extensive customization options, while jsQR is primarily used for QR code scanning and decoding from image data.

Pros of QR-Code-generator

• Supports multiple programming languages (C++, Java, JavaScript, Python)
• Provides more low-level control and customization options
• Offers better performance for generating large numbers of QR codes

Cons of QR-Code-generator

• Less user-friendly for beginners or simple use cases
• Requires more manual configuration and setup
• Limited built-in styling options compared to qr-code

Code Comparison

QR-Code-generator (Python):

import qrcode
qr = qrcode.QrCode(version=1, error_correction=qrcode.ErrorCorrectionLevel.L)
qr.add_data("Hello, World!")
qr.make(fit=True)

qr-code (PHP):

use Endroid\QrCode\QrCode;

$qrCode = new QrCode('Hello, World!');
$qrCode->setSize(300);
$qrCode->setMargin(10);

QR-Code-generator focuses on providing a flexible, low-level API for generating QR codes across multiple languages, making it suitable for more complex projects or when performance is crucial. On the other hand, qr-code offers a more user-friendly approach with built-in styling options, making it easier to use for simple QR code generation tasks, especially in PHP-based projects.

Pros of qrcodejs

• Pure JavaScript implementation, no server-side processing required
• Lightweight and easy to integrate into web applications
• Supports various output formats (canvas, table, SVG)

Cons of qrcodejs

• Limited customization options compared to qr-code
• Less actively maintained (last update in 2020)
• Lacks advanced features like error correction level adjustment

Code Comparison

qrcodejs:

var qrcode = new QRCode("qrcode", {
    text: "http://example.com",
    width: 128,
    height: 128,
    colorDark : "#000000",
    colorLight : "#ffffff",
    correctLevel : QRCode.CorrectLevel.H
});

qr-code:

use Endroid\QrCode\QrCode;

$qrCode = new QrCode('http://example.com');
$qrCode->setSize(300);
$qrCode->setMargin(10);
$qrCode->writeFile('qrcode.png');

Summary

qrcodejs is a client-side JavaScript library for generating QR codes, making it ideal for web applications that require quick and simple QR code generation. It's lightweight and easy to use but lacks some advanced features and customization options.

qr-code, on the other hand, is a PHP library that offers more robust features and customization options. It supports server-side generation and provides additional functionality like error correction level adjustment and various output formats.

Choose qrcodejs for simple, client-side QR code generation in web applications, and qr-code for more advanced, server-side QR code generation with greater customization options.

Pros of qrcode-generator

• Supports multiple programming languages (JavaScript, Java, C++, etc.)
• Lightweight and has minimal dependencies
• Offers more customization options for QR code generation

Cons of qrcode-generator

• Less actively maintained compared to qr-code
• Documentation is not as comprehensive
• Fewer built-in features for image manipulation and output formats

Code Comparison

qrcode-generator (JavaScript):

var qr = qrcode(4, 'L');
qr.addData('Hello, World!');
qr.make();
var imgTag = qr.createImgTag(4);

qr-code (PHP):

use Endroid\QrCode\QrCode;

$qrCode = new QrCode('Hello, World!');
$qrCode->setSize(300);
$qrCode->setMargin(10);
$qrCode->writeFile('qrcode.png');

Both libraries offer straightforward ways to generate QR codes, but qr-code provides a more object-oriented approach with additional built-in options for customization and output. qrcode-generator's implementation is more lightweight and can be easily integrated into various programming environments.

Pros of libqrencode

• Written in C, offering potentially better performance and lower-level system integration
• Supports a wider range of QR code versions and error correction levels
• Can be used as a library in various programming languages through bindings

Cons of libqrencode

• Requires compilation and may be more complex to set up for some users
• Less user-friendly for developers who prefer high-level language implementations
• May require additional steps for integration in web-based projects

Code Comparison

libqrencode (C):

QRcode *qrcode = QRcode_encodeString("Hello, World!", 0, QR_ECLEVEL_L, QR_MODE_8, 1);

qr-code (PHP):

$writer = new PngWriter();
$qrCode = QrCode::create('Hello, World!')
    ->setEncoding(new Encoding('UTF-8'))
    ->setErrorCorrectionLevel(new ErrorCorrectionLevelLow());
$result = $writer->write($qrCode);

Summary

libqrencode is a powerful C library for generating QR codes, offering high performance and extensive customization options. It's suitable for low-level integrations and supports multiple programming languages through bindings. However, it may require more setup and technical knowledge compared to qr-code, which provides a more user-friendly PHP implementation for web developers. The choice between the two depends on the specific project requirements, programming language preferences, and desired level of control over the QR code generation process.