Noureddine RAMDI / Inside WooCommerce's monorepo: managing PHP and JavaScript at scale

Created Sat, 02 May 2026 20:07:04 +0000 Modified Sat, 23 May 2026 20:41:27 +0000
977 Words
github-stars php woocommerce monorepo npm pnpm composer

woocommerce/woocommerce

WooCommerce is one of the most popular open-source e-commerce platforms, powering millions of online stores worldwide. What’s interesting under the hood is how WooCommerce manages its codebase: a monorepo that combines PHP core, extensions, and modern JavaScript tooling into a single structured repository. This setup is a good example of handling complexity and cross-stack collaboration in a large PHP project.

What the WooCommerce monorepo is and how it’s structured

The WooCommerce monorepo houses the entire core plugin, its extensions, and the development tools needed to build and test the project. It’s designed to support both PHP and JavaScript development, acknowledging that WooCommerce is no longer just a PHP plugin but a full-fledged e-commerce platform with frontend components and build pipelines.

The repo is organized into three main areas:

  • Plugins: These include the WooCommerce core plugin itself and various official extensions.
  • Packages: These are reusable components, split between PHP packages and JavaScript packages.
  • Tools: Internal and external utilities used for building, testing, and maintaining the codebase.

A notable point is the use of PHP 7.4+ as a baseline, aligning with modern PHP features and performance improvements. For JavaScript, the repo uses an .nvmrc file to lock Node.js versions, recommending NVM to manage that. Dependencies and scripts are managed via PNPM instead of more common npm or Yarn approaches, which helps with fast and efficient installs in this multi-package setup.

Composer handles the PHP dependencies, ensuring that PHP packages and plugins have their own clear dependency management separate from JavaScript. This dual-tooling reflects a careful balance between PHP and JS ecosystems.

Why the WooCommerce monorepo approach matters

Managing a large open-source PHP project with a modern frontend stack isn’t trivial. The monorepo strategy here offers several advantages:

  • Unified development experience: Contributors can work across PHP and JavaScript components without switching repositories, which simplifies cross-stack pull requests and issue tracking.
  • Modularity and reuse: Splitting code into packages (PHP and JS) encourages reusability and clearer boundaries between components.
  • Consistent environment: Using .nvmrc and PNPM ensures that everyone uses the same Node.js version and package versions. Composer requirements enforce the PHP version and dependencies.

That said, there are tradeoffs. Monorepos can become harder to manage as the codebase grows, especially with mixed languages and toolchains. Build times can increase, and the complexity of dependency resolution rises. The WooCommerce team addresses this with clear tooling and documentation, but it requires discipline from contributors.

The code quality is generally good, reflecting the maturity of the project. The PHP code is modularized into packages rather than a single monolithic plugin, which is a good architectural practice. The JavaScript side uses modern tools and package management but sticks to standard approaches to keep the learning curve manageable.

Getting started with the WooCommerce monorepo

The repo’s README provides a clear Getting Started section. Here’s the exact setup sequence they recommend:

### Prerequisites

-   NVM: While you can always install Node through other means, we recommend using NVM to ensure you're aligned with the version used by our development teams. Our repository contains an `.nvmrc` file which helps ensure you are using the correct version of Node.
-   PNPM: Our repository utilizes PNPM to manage project dependencies and run various scripts involved in building and testing projects.
-   PHP 7.4+: WooCommerce Core currently requires PHP version 7.4 or higher. It is also needed to run Composer and various project build scripts. See troubleshooting for troubleshooting problems installing PHP.
-   Composer: We use Composer to manage all of the dependencies for PHP packages and plugins.

Note: A POSIX-compliant operating system (e.g., Linux, macOS) is assumed. If you're working on a Windows machine, the recommended approach is to use WSL (available since Windows 10).

Once you've installed all prerequisites, the following will prepare all of the build outputs necessary for development:

This setup ensures that contributors have a consistent Node and PHP environment aligned with the core development team. The reliance on POSIX-compliant systems or WSL on Windows is a practical limitation worth noting.

From there, developers can explore the plugins and packages directories, run build and test scripts, and contribute fixes or new features.

who benefits from WooCommerce’s monorepo

This repo is highly relevant for PHP developers and teams contributing to or customizing WooCommerce. The monorepo approach streamlines working across PHP backend logic and JavaScript-driven frontend or build tooling.

It also suits organizations that want a single repository for all e-commerce related code, reducing fragmentation. However, the complexity of managing a large mixed-language monorepo means it’s not ideal for small teams unfamiliar with Node.js or PHP package management.

The PHP 7.4+ baseline is good for modern features but may exclude legacy hosting environments. The POSIX system dependency means Windows users have an extra step in setting up WSL.

Overall, WooCommerce’s monorepo balances traditional PHP development with modern JS tooling in a way that’s practical and scalable. It’s a solid reference for other large PHP projects looking to modernize their stack without splitting codebases.

→ GitHub Repo: woocommerce/woocommerce ⭐ 10,268 · PHP