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Vendor avdeb
Package qr-php
Short Description Simple PHP library for generating QR codes.
License MIT
Homepage https://avdeb.com/qr-code-generator/
Package qr-php
Short Description Simple PHP library for generating QR codes.
License MIT
Homepage https://avdeb.com/qr-code-generator/
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Informations about the package qr-php
avdeb/qr-php
Simple PHP library for generating QR codes.
Try it online: https://avdeb.com/qr-code-generator/
Install
Usage
Save a QR code to a file
Serve a QR code dynamically (no file on disk)
Contact card (vCard) QR code
API
QRCodeGenerator (final)
| Method | Description |
|---|---|
__construct(array $options = []) |
Options: size (int, px per module, 1–100, default 10), margin (int, quiet-zone modules, 0–64, default 4), errorCorrection ('L'/'M'/'Q'/'H' or ErrorCorrectionLevel, default M), foreground / background (hex colour, default #000000 / #ffffff). Unknown keys or wrong types throw QrException. |
generate(string $data, string $filename): bool |
Writes an SVG or PNG (chosen by extension). Returns false if the file could not be written; throws QrException for bad extension, empty filename or data too long. |
render(string $data, string $format = 'svg'): string |
Returns the image bytes (svg or png). |
encode(string $data): QrMatrix |
Encodes without rendering. |
setSize(int $size): void / getSize(): int |
Pixels per module. |
setMargin(int $margin): void / getMargin(): int |
Quiet zone in modules. |
setErrorCorrection(string\|ErrorCorrectionLevel $level): void / getErrorCorrection(): ErrorCorrectionLevel |
Error correction level. |
setForeground(string $hex): void, setBackground(string $hex): void |
#rrggbb or #rgb. |
Encoder (final)
encode(string $data, ErrorCorrectionLevel $ecl = Medium, ?int $mask = null): QrMatrix— picks the smallest version 1–40;$maskforces pattern 0–7,nullselects by penalty score.static maxBytes(int $version, ErrorCorrectionLevel $ecl): int— byte capacity (e.g. version 1-L = 17, version 40-L = 2953).static rawDataModules(int $version): int— data+ECC module count.
QrMatrix (final, immutable)
- Properties:
version,size,errorCorrection,mask. isDark(int $x, int $y): bool(throws when out of range),toArray(): list<list<bool>>([y][x]),toText(string $dark = '##', string $light = ' '): string.
ErrorCorrectionLevel (enum: Low='L', Medium='M', Quartile='Q', High='H')
static fromString(string $level): self,formatBits(): int.
VCard (final, immutable)
__construct(string $firstName, string $lastName = '', ?string $phone = null, ?string $email = null, ?string $organization = null, ?string $title = null, ?string $url = null)toString(): string/__toString()— vCard 3.0 with CRLF line endings and escaped text.
Renderers
SvgRenderer::render(QrMatrix, int $scale, int $margin, Color $fg, Color $bg): stringPngRenderer::render(QrMatrix, int $scale, int $margin, Color $fg, Color $bg): string— 1-bit palette PNG, no GD needed.PngRenderer::zlibStored(string $raw): string— uncompressed zlib stream (fallback when ext-zlib is absent).
Color (final, immutable)
__construct(int $red, int $green, int $blue),static fromHex(string $hex): self,toHex(): string.
QrException
Extends InvalidArgumentException; thrown for all invalid input.
Notes
- Encoding uses byte mode only (ISO/IEC 18004, versions 1–40, levels L/M/Q/H). Strings are encoded as their raw bytes, so UTF-8 text works with modern scanners; no ECI header is written. Numeric/alphanumeric/Kanji mode optimisation is not implemented, so purely numeric data uses a slightly larger symbol than necessary.
- Capacity at version 40: 2953 bytes (L), 2331 (M), 1663 (Q), 1273 (H). Longer data throws
QrException. sizeis pixels per module; image width = (modules + 2 × margin) × size. Keep margin ≥ 4 for reliable scanning.- PNG output needs no GD/Imagick. If ext-zlib is present the image is compressed, otherwise stored uncompressed (still small, as it is 1 bit per pixel).
- Logo embedding is not built in. A common approach is to generate with
errorCorrection => 'H'and overlay a small logo (well under ~10% of the area, away from the three finder squares) with your image tool, then test-scan. - This library only generates codes. Scanning from a webcam happens in the browser (camera via
getUserMediaplus a JavaScript QR decoder); PHP cannot access the user's camera.
Contributing
Issues and pull requests are welcome at https://github.com/avdeb/qr-php/issues. Run the tests with composer install && vendor/bin/phpunit.
License
MIT © 2026 AVDEB
All versions of qr-php with dependencies
PHP Build Version
Package Version
Requires
php Version
>=8.1
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