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Laravel QrCode

A self-contained QR code generator for Laravel. The entire QR encoding pipeline — data encoding, Reed–Solomon error correction, matrix construction, masking and rendering — is implemented from scratch in this package. It has no third-party QR libraries in its runtime dependencies.

Features

• Pure-PHP QR engine written from scratch (ISO/IEC 18004), no external QR dependencies at runtime.
• SVG output (always available) and PNG output (via the GD extension).
• Full QR Version 1–40 support with automatic version selection.
• All four error correction levels: L, M, Q, H.
• Numeric, alphanumeric and byte encoding modes, with automatic mode detection.
• UTF-8 ECI support so multibyte payloads (e.g. Bangla, Arabic, CJK, emoji) decode back to the original text.
• Fluent, chainable builder with a Laravel facade.
• Configurable size, quiet-zone margin, and foreground/background colors (including a transparent background).
• Save to a file, return a Base64 / data-URI string, or return an HTTP response.
• @qrcode Blade directive.
• Laravel auto-discovery; supports Laravel 9 through 13.

Requirements

• PHP 8.2 or higher
• illuminate/support ^9.0 | ^10.0 | ^11.0 | ^12.0 | ^13.0
• ext-gd — only required for PNG output. SVG works without it.

Installation

Laravel auto-discovery

The package registers itself automatically through Laravel's package discovery — no manual setup is required. It provides:

• Service provider: Fahad\QrCode\QrCodeServiceProvider
• Facade alias: QrCode → Fahad\QrCode\Facades\QrCode

To customize the defaults, publish the config file:

This publishes config/qrcode.php (size, margin, format, error correction, and ECI defaults).

Basic usage

Use the facade and chain builder methods, then call generate():

The builder is also directly instantiable (and container-resolvable) without the facade:

Because the builder implements Stringable, casting it to a string generates the code as well:

SVG generation

SVG is the default format. Output is a compact, standalone XML document using a single <path> element for all modules, with shape-rendering="crispEdges".

PNG generation

PNG requires the GD extension. The requested pixel size is rounded down to a whole number of modules, and rendered dimensions are capped at 5000px to prevent excessive memory allocation.

Error correction

Choose a level with errorCorrection(). Higher levels tolerate more damage at the cost of larger symbols. An invalid level throws InvalidErrorCorrectionLevelException.

Size and margin

size() sets the image side length in pixels; margin() sets the quiet-zone width measured in modules (default 4).

Colors

Set foreground and background colors independently, or both at once with color(). Hex codes and a set of named colors (black, white, red, green, blue, yellow, cyan, magenta, gray/grey) are supported for both formats; SVG additionally accepts any color string valid as an SVG fill. A background of transparent (or none) omits the background entirely.

File saving

save() writes the rendered code to disk, creating parent directories as needed. It throws FileWriteException on failure.

Base64

base64() returns the encoded code. By default it prefixes a data URI (using the format's content type); pass false for the raw Base64 string.

HTTP response

response() returns an Illuminate\Http\Response with the correct Content-Type. The builder also implements Responsable, so you can return it directly from a controller.

Blade directive

The @qrcode directive renders a QR code inline (best suited to SVG). It accepts the payload and an optional options array.

Supported option keys: size, margin, format, error_correction, foreground_color / color, background_color / background, encoding_mode / mode, and eci.

Supported QR versions

All 40 versions (1 through 40) defined by ISO/IEC 18004 are supported, from a 21×21 module symbol (Version 1) up to 177×177 (Version 40). The smallest version that fits the payload at the chosen error correction level is selected automatically. Payloads exceeding Version 40 capacity throw QrCodeOverflowException.

Supported encoding modes

Set the mode with encodingMode() (alias mode()), or leave it on auto:

• Numeric — digits 0–9.
• Alphanumeric — digits, uppercase A–Z, space, and $ % * + - . / :.
• Byte — any binary / UTF-8 string.
• Auto (default) — detects the most efficient valid mode for the payload.

For multibyte byte-mode payloads, a UTF-8 ECI header is declared automatically. Control it with eci(true|false|null), where null is automatic.

Testing

The suite covers the encoding pipeline, error correction, every version/ECC combination, rendering, and the public API. Integration tests decode the generated codes with a third-party decoder (a dev-only dependency) to confirm they are readable.

Architecture

The QR engine is framework-agnostic and organized into focused namespaces:

• Fahad\QrCode\Encoding — segment building, bit buffers, and mode encoders.
• Fahad\QrCode\ErrorCorrection — Galois field arithmetic and Reed–Solomon error-correction coding.
• Fahad\QrCode\Matrix — version table, finder/alignment/timing patterns, format/version information, data placement, and mask-pattern selection.
• Fahad\QrCode\Renderer — the SvgRenderer and PngRenderer.

Fahad\QrCode\QrCode is the fluent builder that collects options and delegates to the engine; no algorithm code lives in it. The Laravel integration (service provider, facade, Blade directive, config) is a thin layer over that engine.

License

Released under the MIT License.