Coder is a library to review Drupal code.

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Coder is a library for automated Drupal code reviews and coding standard fixes. It defines rules for PHP_CodeSniffer

Built-in support for:

Online documentation: https://www.drupal.org/node/1419980

Note that Javascript support has been removed. To check and fix Javascript files please use ESLint and see the Drupal ESLint documentation.


First, make sure Composer is installed correctly:

which composer

If you get composer not found or similar, follow Composer's installation instructions.

Install Coder (8.x-2.x) in your global Composer directory in your home directory (~/.composer):

composer global require drupal/coder

To make the phpcs and phpcbf commands available globally, add the composer bin path to your $PATH variable in ~/.profile, ~/.bashrc or ~/.zshrc:

export PATH="$PATH:$HOME/.composer/vendor/bin"

Register the Drupal and DrupalPractice Standard with PHPCS:

phpcs --config-set installed_paths ~/.composer/vendor/drupal/coder/coder_sniffer


Check Drupal coding standards

phpcs --standard=Drupal /file/to/drupal/example_module

Check Drupal best practices

phpcs --standard=DrupalPractice /file/to/drupal/example_module

Automatically fix coding standards

phpcbf --standard=Drupal /file/to/drupal/example_module

Working with Editors

Drupal Code Sniffer can be used with various editors.


Automated Testing (PHPUnit + PHPCS)

Coder Sniffer comes with a PHPUnit test suite to make sure the sniffs work correctly. Use Composer to install the dependencies:

composer install

Then execute the tests:


Then execute the coding standards checker on Coder itself:



  1. Make sure an issue exists at https://www.drupal.org/project/issues/coder
  2. Create a pull request against https://github.com/klausi/coder
  3. Post a link to the pull request to the issue on drupal.org and set the issue to "needs review"

Thank you!


Klaus Purer, https://www.drupal.org/u/klausi


Greg Sherwood and Squiz Pty Ltd, many sniffs are modified copies of their original work on PHPCS.