QRCode - Simple test of generating a QR code

Uses the chillerlan/php-qrcode generator

https://github.com/chillerlan/php-qrcode

Quick summary: This repository is a tiny PHP demo that generates a QR code using the chillerlan/php-qrcode library and prints it as an inline base64 PNG in an HTML <img> tag. Follow the steps below to install, run, and customize the example.

Project Overview

A minimal example showing how to generate a QR code in PHP using chillerlan/php-qrcode. The script loads Composer autoload, creates a QRCode instance, renders the supplied data to a base64 data URI, and prints an <img> tag so the QR appears directly in the browser. The library offers many configuration options and output formats for production use.

Features

• Single-file demo for quick testing.
• Base64 data URI output so no temporary files are required.
• Easy to extend with QROptions for size, ECC level, colors, and different output backends.

---

Requirements

• PHP 7.4+ (or the version supported by the library you install).
• Composer to install dependencies.
• Optional: ImageMagick or GD if you plan to use those output backends.

Installation

1. Initialize Composer in your project folder if you haven’t already:

   composer init

2. Require the chillerlan QR library:

   composer require chillerlan/php-qrcode

3. Place the demo PHP file in your web root and ensure vendor/autoload.php is reachable.

The library repository and examples are a helpful reference for matching your installed version to example code.

Usage Example

Save this as qrdemo.php and open it in your browser:

<?php
use chillerlan\QRCode\QRCode;
require_once 'vendor/autoload.php';

$data   = '13534223';
$qrcode = (new QRCode)->render($data);

printf('<img src="%s" alt="QR Code" width="200px" height="200px" />', $qrcode);

This returns a base64 PNG data URI and embeds it in an <img> tag. A quick tutorial with similar examples is available online for reference and additional configuration tips.

Customization Notes

• Use QROptions to set version, eccLevel (L, M, Q, H), scale, colors, and output interface (GD, Imagick, SVG, etc.).
• To save to a file instead of a data URI, use the library’s saveToFile or output interface methods.
• For logos, rounded modules, or advanced styling, check the examples folder in the repo for patterns you can adapt.

Troubleshooting

• If the image does not display, inspect the HTML source to confirm the src contains a data:image/png;base64, URI.
• Ensure required PHP extensions (GD or Imagick) are installed when using those backends.
• Match examples to the library branch/version you installed to avoid API mismatches.

Resources and Examples

• Official manual and configuration reference.
• Example scripts and advanced demos in the project examples directory.
• Community tutorial with quick-start snippets and configuration guidance.

License

License

This project is licensed under the MIT License. The chillerlan/php-qrcode library is open source; see its repository for license details.

---