Composer plugin that scopes WordPress and WooCommerce dependencies for usage in WordPress plugins and themes.






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3.2.12 2024-03-20 15:06 UTC


Using Composer in your WordPress plugin or theme can benefit from that. But it also comes with a danger of conflicts with dependencies of other plugins or themes. Luckily, a great tool called PHP Scoper adds all your needed dependencies to your namespace to prevent conflicts. Unfortunately, the configuration is non-trivial, and for that reason, we created the Composer plugin to make scoping easy in WordPress projects.

The main issue with PHP Scoper is that it also scopes global functions, constants and classes. Usually, that is what you want, but that also means that WordPress functions, classes and constants will be scoped. This Composer plugin solves that. It has an up-to-date database of all WordPress and WooCommerce symbols that we want to keep unscoped.


  • wpify/scoper:3.1
    • PHP 7.4 || 8.0
  • wpify/scoper:3.2
    • PHP >= 8.1


  1. This composer plugin is meant to be installed globally, but you can also require it as a dev dependency.
  2. The configuration requires creating composer-deps.json file, that has exactly same structure like composer.json file, but serves only for scoped dependencies. Dependencies that you don't want to scope comes to composer.json.
  3. Add extra.wpify-scoper.prefix to you composer.json, where you can specify the namespace, where your dependencies will be in. All other config options (folder, globals, composerjson, composerlock, autorun) are optional.
  4. The easiest way how to use the scoper on development environment is to install WPify Scoper as a dev dependency. After each composer install or composer update, all the dependencies specified in composer-deps.json will be scoped for you.
  5. Add a config.platform option in your composer.json and composer-deps.json. This settings will make sure that the dependencies will be installed with the correct PHP version.

Example of composer.json with its default values

  "config": {
    "platform": {
      "php": "8.0.30"
  "scripts": {
    "wpify-scoper": "wpify-scoper"
  "extra": {
    "wpify-scoper": {
      "prefix": "MyNamespaceForDeps",
      "folder": "deps",
      "globals": [
      "composerjson": "composer-deps.json",
      "composerlock": "composer-deps.lock",
      "autorun": true
  1. Option autorun defaults to true so that scoping is run automatically upon composer update or install command. That is not what you want in all cases, so you can set it false if you need. To start prefixing manually, you need to add for example the line "wpify-scoper": "wpify-scoper" to the "scripts" section of your composer.json. You then run the script with the command composer wpify-scoper install or composer wpify-scoper update.

  2. Scoped dependencies will be in deps folder of your project. You must include the scoped autoload alongside with the composer autoloader.

  3. After that, you can use your dependencies with the namespace.

Example PHP file:

require_once __DIR__ . '/deps/scoper-autoload.php';
require_once __DIR__ . '/deps/autoload.php';
require_once __DIR__ . '/vendor/autoload.php';

new \MyNamespaceForDeps\Example\Dependency();


Deployment with Gitlab CI

To use WPify Scoper with Gitlab CI, you can add the following job to your .gitlab-ci.yml file:

  stage: .pre
  image: composer:2
      - $CI_PROJECT_DIR/deps
      - $CI_PROJECT_DIR/vendor
    expire_in: 1 week
    - PATH=$(composer global config bin-dir --absolute --quiet):$PATH
    - composer global config --no-plugins allow-plugins.wpify/scoper true
    - composer global require wpify/scoper
    - composer install --prefer-dist --optimize-autoloader --no-ansi --no-interaction --no-dev

Deployment with Github Actions

To use WPify Scoper with Github Actions, you can add the following action:

name: Build vendor

    runs-on: ubuntu-20.04

      - name: Checkout
        uses: actions/checkout@v2

      - name: Cache Composer dependencies
        uses: actions/cache@v2
          path: /tmp/composer-cache
          key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}

      - name: Install composer
        uses: php-actions/composer@v6
          php_extensions: json
          version: 2
          dev: no
      - run: composer global config --no-plugins allow-plugins.wpify/scoper true
      - run: composer global require wpify/scoper
      - run: sudo chown -R $USER:$USER $GITHUB_WORKSPACE/vendor
      - run: composer install --no-dev --optimize-autoloader

      - name: Archive plugin artifacts
        uses: actions/upload-artifact@v2
          name: vendor
          path: |

Advanced configuration

PHP Scoper has plenty of configuration options. You can modify this configuration array by creating scoper.custom.php file in root of your project. The file should contain customize_php_scoper_config function, where the first parameter is the preconfigured configuration array. Expected output is valid PHP Scoper configuration array.

Example scoper.custom.php file


function customize_php_scoper_config( array $config ): array {
    $config['patchers'][] = function( string $filePath, string $prefix, string $content ): string {
        if ( strpos( $filePath, 'guzzlehttp/guzzle/src/Handler/CurlFactory.php' ) !== false ) {
            $content = str_replace( 'stream_for($sink)', 'Utils::streamFor()', $content );
        return $content;
    return $config;