README

Pre-built wkhtmltopdf 0.12.6.1 (patched Qt) for PHP projects — bundled static-ish binaries, a fluent PHP wrapper, and a multi-arch Docker fallback for platforms without a native binary.

Why this package exists: the wkhtmltopdf project is archived — 0.12.6.1-3 is the final release, forever. Its binary depends on a patched Qt and a set of aging shared libraries that get harder to satisfy with every new OS release. This package preserves a known-good build in two forms: bundled binaries for platforms that can still run them natively, and a frozen Ubuntu 22.04 Docker image (ghcr.io/restruct/wkhtmltopdf:0.12.6, amd64+arm64) for everything else.

New to Docker or fuzzy on how the pieces fit? Read HOW-IT-WORKS.md — a from-scratch explainer of the image/container/registry/multi-arch story behind this package.

Installation

composer require restruct/wkhtmltopdf-static

Requires PHP ≥ 8.1 and symfony/process (^6 or ^7).

Quick start

use Restruct\WkhtmltoPdf\WkhtmltoPdf;

// HTML string → PDF file
$result = WkhtmltoPdf::create()
    ->margins('0px', '0px', '0px', '0px')
    ->enableLocalFileAccess()       // required when HTML references local CSS/images
    ->disableSmartShrinking()       // fixes 0.12.4→0.12.6 scaling differences
    ->generateFromHtml($html, '/path/to/output.pdf');

// HTML string → raw PDF bytes (throws RuntimeException on failure)
$pdfBytes = WkhtmltoPdf::create()->getOutputFromHtml($html);

// URL → PDF file
WkhtmltoPdf::create()->generateFromUrl('https://example.com/', '/path/to/output.pdf');

Every wkhtmltopdf CLI option is reachable — common ones have named methods (pageSize(), orientation(), dpi(), headerHtml(), footerCenter(), javascriptDelay(), username()/password() for HTTP auth, …), everything else via the generic setters:

WkhtmltoPdf::create()
    ->setOption('grayscale', true)                  // boolean flag → --grayscale
    ->setOptions(['page-size' => 'A3', 'dpi' => 300])
    ->timeout(300)                                  // per-call timeout (default 120s)
    ->generateFromHtml($html, $out);

generateFromHtml()/generateFromUrl() return a WkhtmltoPdfResult (->isSuccessful(), ->output, ->errorOutput, ->exitCode); the getOutput*() variants return raw bytes and throw on failure.

Migrating from knplabs/knp-snappy

The API is a drop-in style replacement:

// Before (Snappy)
$snappy = new \Knp\Snappy\Pdf($binaryPath);
$snappy->generateFromHtml($html, $file, $options, true);

// After
WkhtmltoPdf::create()->setOptions($options)->generateFromHtml($html, $file);

No binary path needed — resolution is automatic (see below).

How execution works: binary first, Docker fallback

WkhtmltoPdfStatic::run() picks a strategy per call:

1. binary — if a wkhtmltopdf binary is resolved, it runs as a plain OS process. Fastest; Docker not involved at all.
2. docker — otherwise, if a Docker image is configured and the Docker daemon responds, each call runs a throwaway container: docker run --rm -v /tmp:/tmp <image> <args>. The system temp dir is volume-mounted so input HTML and output PDF are visible to both host and container. ~100–300 ms startup overhead per call, no persistent state.
3. Neither available → RuntimeException.

use Restruct\WkhtmltoPdf\WkhtmltoPdfStatic;

WkhtmltoPdfStatic::isAvailable();   // true if either strategy works
WkhtmltoPdfStatic::getStrategy();   // 'binary' | 'docker' | ''
WkhtmltoPdfStatic::version();       // "wkhtmltopdf 0.12.6.1 (with patched qt)"

Configuration (constants / environment)

bootstrap.php (included automatically on first use, guarded by defined() checks) resolves two constants:

Typical .env on a server:

# Option A: native binary (fastest — preferred where it still runs)
WKHTMLTOPDF_PATH=/usr/local/bin/wkhtmltopdf

# Option B: Docker (for hosts where the native libs are unavailable/broken)
WKHTMLTOPDF_DOCKER_IMAGE=ghcr.io/restruct/wkhtmltopdf:0.12.6

If both resolve, the native binary wins.

Platform support

The Docker image is the answer for every platform without a workable native binary — and the long-term insurance for when OS upgrades break the native ones.

The Docker image

ghcr.io/restruct/wkhtmltopdf:0.12.6 — public, multi-arch (linux/amd64 + linux/arm64). Ubuntu 22.04 with the official final wkhtmltopdf deb and all runtime libraries frozen in. Built from build/Dockerfile:

build/build.sh          # build native-arch image locally (for testing)
build/build.sh --push   # build amd64+arm64 and push manifest to ghcr.io
                        # (requires: docker login ghcr.io with a write:packages token)

Server deployment notes (Laravel Forge: pulling the image, docker group for the PHP user, deploy-script line) live in the FUSE project docs: docs/forge-wkhtmltopdf-docker.md.

Native install on Ubuntu servers (verified on 22.04 jammy AND 24.04 noble)

Hard-won gotchas from getting this running on a production server:

• Do NOT use Ubuntu's own wkhtmltopdf package — it's built against unpatched system Qt (different rendering, missing features such as native headers/footers). Remove it if present; its output does not match the patched-Qt build used everywhere else.
• Upstream ships no 24.04 (noble) deb — the jammy deb installs and runs fine on 24.04 once the font dependencies are in place.
• xfonts-75dpi / xfonts-base are not preinstalled on typical server images, so a bare dpkg -i fails on unmet dependencies. Install them first (or rescue a half-installed state with apt --fix-broken install).
• The official deb installs to /usr/local/bin/wkhtmltopdf (the distro package used /usr/bin) — this matches bootstrap.php's Linux candidate order.

# 1. Remove the distro package if present (unpatched Qt!)
sudo apt-get remove wkhtmltopdf && sudo apt autoremove

# 2. Dependencies (the xfonts packages are the ones usually missing)
sudo apt-get update
sudo apt-get install -y xfonts-75dpi xfonts-base libfontconfig1 libfreetype6 libjpeg-turbo8 libx11-6 libxext6 libxrender1

# 3. Official final-release deb (jammy build, works on 22.04 and 24.04)
wget https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6.1-3/wkhtmltox_0.12.6.1-3.jammy_amd64.deb
sudo dpkg -i wkhtmltox_0.12.6.1-3.jammy_amd64.deb
sudo apt-get install -f        # safety net: configures + pulls any remaining deps

# 4. Verify
which wkhtmltopdf              # → /usr/local/bin/wkhtmltopdf
wkhtmltopdf -V                 # → wkhtmltopdf 0.12.6.1 (with patched qt)

Package contents

bootstrap.php        constant resolution (WKHTMLTOPDF_PATH / _DOCKER_IMAGE)
src/
  WkhtmltoPdf.php        fluent HTML→PDF API (Snappy replacement)
  WkhtmltoPdfStatic.php  strategy resolution + process execution
  WkhtmltoPdfResult.php  output/errorOutput/exitCode value object
x64/mac/, x64/linux/     bundled 0.12.6.1 patched-Qt binaries
build/                   Dockerfile + multi-arch build script

License

LGPL-3.0-only — matching upstream wkhtmltopdf's license, which permits redistribution of the bundled binaries. See LICENSE.