php-qml

A framework for native desktop applications with a Symfony / FrankenPHP backend and a Qt / QML frontend, packaged as a single distributable per OS.

Status: Phase 5 / pre-v0.1.0. Phases 0–4a are merged (working framework, real POC, Linux AppImage, auto-update, release CI). macOS and Windows packaging are deferred to 4b/4c. See CHANGELOG.md.

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What it is

php-qml lets a PHP developer write a desktop app using ordinary Symfony on the backend and ordinary QML on the frontend. The two halves run as a process pair inside one bundled binary:

• A Qt/QML host owns the window, input, and rendering.
• A bundled FrankenPHP child runs a Symfony app in worker mode.
• They communicate over a local socket — HTTP for commands and queries, Mercure SSE for state push.

It is not a PHP↔Qt language binding — the languages run in separate processes; the bridge is a wire protocol, not an FFI layer. That deliberately avoids the failure mode that left php-gtk and php-qt unmaintained.

60-second tour

git clone https://src.bundespruefstelle.ch/magdev/php-qml && cd php-qml

# Scaffold a fresh app
./bin/php-qml-init my-app

# Run it
cd my-app
make doctor                 # readiness check
make dev                    # FrankenPHP --watch + Qt host

Add a reactive resource (entity + REST controller + QML snippet) with one maker:

cd my-app/symfony
bin/console make:bridge:resource Todo
bin/console make:migration && bin/console doctrine:migrations:migrate -n

make dev opens the Qt window, connection state flips to Online, and the generated TodoList.qml shows a list whose ReactiveListModel is auto-subscribed to app://model/todo over Mercure. There is no handwritten cross-side glue.

For a non-trivial app with a multi-window test, crash-recovery test, and AppImage packaging, see examples/todo/.

Documentation

The full developer documentation lives under docs/:

• Getting started — prerequisites by distro, first project, troubleshooting.
• Architecture — process pair, transport, dev vs bundled mode.
• Update semantics — connection state machine, optimistic mutations, idempotency.
• Reactive models — ReactiveListModel, ReactiveObject, Mercure dual-publish.
• Makers — make:bridge:resource / command / window.
• Dev workflow — hot reload, dev console, editor setup, bridge:doctor.
• Bundled mode — supervisor, per-session secret rotation, first-launch migrations.
• Linux packaging — make appimage, auto-update, performance budgets.
• Configuration reference — env vars, CLI flags.
• QML API reference / PHP API reference — singletons, components, attributes, services.

Design rationale and roadmap live in PLAN.md. User-facing changes per release are in CHANGELOG.md.

Tech stack

PHP 8.4+ · Symfony 8 · Doctrine ORM 3 · FrankenPHP 1.12+ (worker mode) · Mercure · Qt 6.5+ · CMake · Composer · Gitea Actions

Roadmap

• Phase 0 ✅ throwaway transport spike.
• Phase 1 ✅ framework skeleton, dev mode, single-instance lock, CI quality gate.
• Phase 2 ✅ reactive models, update semantics, headline maker.
• Phase 3 ✅ POC todo app, integration + snapshot tests.
• Phase 4a ✅ bundled mode, Linux AppImage, release CI, AppImageUpdate.
• Phase 4b/4c ⏳ macOS / Windows packaging.
• Phase 5 🚧 DX polish — dev console, init script, hot-reload docs, v0.1.0 prep.

Contributing

Active development happens on the dev branch; main only carries release commits. Pull requests target dev.

cd framework/php && composer quality   # PHPStan + cs-fixer + PHPUnit
cd examples/todo  && make quality      # adds qmllint + integration test

A dedicated CONTRIBUTING.md arrives with Phase 5's wrap-up.

Versioning

Semantic Versioning — MAJOR.MINOR.BUGFIX. Pre-v1.0.0, minor bumps may break public API.

License

To be decided before v0.1.0 is tagged. The framework's own code will be permissively licensed; Qt is shipped under LGPL with relinkability obligations — see PLAN.md §12.