php-qrcode/examples/svgWithLogo.php

<?php
/**
 * @created      05.03.2022
 * @author       smiley <smiley@chillerlan.net>
 * @copyright    2022 smiley
 * @license      MIT
 *
 * @noinspection PhpComposerExtensionStubsInspection
 */

namespace chillerlan\QRCodeExamples;

use chillerlan\QRCode\{QRCode, QRCodeException, QROptions};
use chillerlan\QRCode\Data\QRMatrix;
use chillerlan\QRCode\Common\EccLevel;
use function file_exists, gzencode, header, is_readable, max, min;

require_once __DIR__.'/../vendor/autoload.php';

$data = 'https://www.youtube.com/watch?v=dQw4w9WgXcQ';
$gzip = true;

$options_arr = [
	// SVG logo options (see extended class below)
	'svgLogo'             => __DIR__.'/github.svg', // logo from: https://github.com/simple-icons/simple-icons
	'svgLogoScale'        => 0.25,
	'svgLogoCssClass'     => 'dark',
	// QROptions
	'version'             => 5,
	'outputType'          => QRCode::OUTPUT_CUSTOM,
	'outputInterface'     => QRSvgWithLogo::class,
	'imageBase64'         => false,
	// ECC level H is necessary when using logos
	'eccLevel'            => EccLevel::H,
	'addQuietzone'        => true,
	// if set to true, the light modules won't be rendered
	'imageTransparent'    => false,
	// empty the default value to remove the fill* attributes from the <path> elements
	'markupDark'          => '',
	'markupLight'         => '',
	// draw the modules as circles isntead of squares
	'drawCircularModules' => true,
	'circleRadius'        => 0.45,
	// connect paths
	'svgConnectPaths'     => true,
	// keep modules of thhese types as square
	'keepAsSquare'        => [
		QRMatrix::M_FINDER|QRMatrix::IS_DARK,
		QRMatrix::M_FINDER_DOT,
		QRMatrix::M_ALIGNMENT|QRMatrix::IS_DARK,
	],
	// https://developer.mozilla.org/en-US/docs/Web/SVG/Element/linearGradient
	'svgDefs'             => '
	<linearGradient id="gradient" x1="100%" y2="100%">
		<stop stop-color="#D70071" offset="0"/>
		<stop stop-color="#9C4E97" offset="0.5"/>
		<stop stop-color="#0035A9" offset="1"/>
	</linearGradient>
	<style><![CDATA[
		.dark{fill: url(#gradient);}
		.light{fill: #eaeaea;}
	]]></style>',
];

// augment the QROptions class
$options = new class ($options_arr) extends QROptions{
	// path to svg logo
	protected string $svgLogo;
	// logo scale in % of QR Code size, clamped to 10%-30%
	protected float $svgLogoScale = 0.20;
	// css class for the logo (defined in $svgDefs)
	protected string $svgLogoCssClass = '';

	// check logo
	protected function set_svgLogo(string $svgLogo):void{

		if(!file_exists($svgLogo) || !is_readable($svgLogo)){
			throw new QRCodeException('invalid svg logo');
		}

		// @todo: validate svg

		$this->svgLogo = $svgLogo;
	}

	// clamp logo scale
	protected function set_svgLogoScale(float $svgLogoScale):void{
		$this->svgLogoScale = max(0.05, min(0.3, $svgLogoScale));
	}

};

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

header('Content-type: image/svg+xml');

if($gzip){
	header('Vary: Accept-Encoding');
	header('Content-Encoding: gzip');
	$qrcode = gzencode($qrcode, 9);
}

echo $qrcode;