Configure Xdebug for Docker

Xdebug is an extension for debugging your PHP. The following explains how to configure Xdebug and PhpStorm to debug in your local Docker environment.

If you use Microsoft Windows, take the following steps before continuing:

  1. Open your Docker settings.
  2. Select the Expose daemon on tcp://localhost:2375 without TLS checkbox.
  3. Wait for the settings to apply.

Enable Xdebug

To enable Xdebug, you must configure your docker-compose.yaml file at the time you configure your local workstation to Launch Docker.

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generic:
  image: alpine
  environment:
    - PHP_MEMORY_LIMIT=2048M
    - DEBUG=false
    - ENABLE_SENDMAIL=false
    - UPLOAD_MAX_FILESIZE=64M
    - MAGENTO_ROOT=/app
    - PHP_ENABLE_XDEBUG=false
    - PHP_IDE_CONFIG=serverName=magento_cloud_docker
    - XDEBUG_CONFIG=remote_host=host.docker.internal
  env_file:
    - ./docker/config.env

You can change any Xdebug configuration using theXDEBUG_CONFIG option. For example, to change the xdebug.remote_port option:

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XDEBUG_CONFIG='remote_host=host.docker.internal remote_port=9002'

To configure PhpStorm to work with Xdebug:

  1. In your PhpStorm project, open the settings panel.

    • Mac OS X—Select File > Preferences.
    • Windows/Linux—Select File > Settings.
  2. In the Settings panel, expand and locate the Languages & Frameworks > PHP > Servers section.

  3. Click the + to add a server configuration. The project name is in grey at the top.

  4. Configure the following settings for the new server configuration:

    • Name—Enter the name used for the serverName in PHP_IDE_CONFIG option from docker-compose.yml file.
    • Host—Enter localhost.
    • Port—Enter 80.
    • Debugger—Select Xdebug.
  5. Select Use path mappings. In the File/Directory pane, the root of the project for the serverName displays.

  6. In the Absolute path on the server column, click Edit and add a value to the MAGENTO_ROOT option. The default value is /app

  7. Change the Xdebug port to 9001 in the Languages & Frameworks > PHP > Debug > Xdebug > Debug Port panel.

  8. Click Apply.

Using Xdebug

The following steps describe debugging web requests and CLI commands.

To debug web requests:

  1. In your PhpStorm project, click Start listening for connections (Start listening) in the top navigation bar.

  2. Add breakpoints in the pub/index.php file.

  3. Install the debug extension in the browser, and then click Debug to enable.

  4. In the browser, open the https://localhost URL.

  5. When PhpStorm recognizes the Xdebug connection, you can begin debugging web requests.

To debug CLI commands:

You can debug any Magento command or PHP script using the following steps.

  1. In your PhpStorm project, open the Build, Extension, Deployment > Docker panel, and then click + to add a new Docker server and update the following settings:

    • Name—Enter a name for the server, for example Docker Cloud.
    • Connect to Docker daemon with
      • Windows—Select TCP socket and update Engine Api Url with tcp://localhost:2375.
      • Mac OS X—Select Docker for Mac. [default]
  2. In the Languages & Frameworks > PHP > Cli Interpreter panel, click […].

  3. Click [+] to add and configure a new Cli Interpreter from your Docker image. Update the following settings:

    • Name—Enter a name for the new interpreter, such as Magento cloud docker cli.
    • Remote—Select Docker.
      • Server—Select Docker Cloud from the previous step.
      • Image name—Select magento/magento-cloud-docker-php:7.x-cli.
    • Additional > Debugger extension
      • Windows—Enter xdebug.
      • Mac OS X/Linux—Enter xdebug.so.
    • Click Refresh to verify that the interpreter and Xdebug extension are configured properly.
  4. Click Save.

  5. Open the Run/Debug Configuration window and add a new PHP script with the following settings:

    • Name—Enter bin/magento.
    • Configuration > File—Select the path to the bin/magento file in your local environment.
  6. Add breakpoints in the bin/magento file and the debug PHP script created in the previous step.

Using Xdebug Helper

You can install and use the Xdebug Helper Chrome extension to debug your PhP code from the browser.

To use Xdebug Helper with Chrome:

  1. Install the Xdebug Helper extension from the Chrome store.

  2. Enable the extension in Chrome as shown in the following figure.

    Enable the Xdebug extension in Chrome

  3. In Chrome, click Xdebug helper icon in the Chrome toolbar.

  4. From the Xdebug helper menu, click Options.

  5. From the IDE Key list, select PhpStorm.

  6. Click Save.

    Xdebug Helper options