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Constitution (v3.0.0) edition

PHP Coding Standards Fixer

The PHP Coding Standards Fixer (PHP CS Fixer) tool fixes your code to follow standards; whether you want to follow PHP coding standards as defined in the PSR-1, PSR-2, etc., or other community driven ones like the Symfony one. You can also define your (team’s) style through configuration.

It can modernize your code (like converting the pow function to the ** operator on PHP 5.6) and (micro) optimize it.

If you are already using a linter to identify coding standards problems in your code, you know that fixing them by hand is tedious, especially on large projects. This tool does not only detect them, but also fixes them for you.



The recommended way to install PHP CS Fixer is to use Composer in a dedicated composer.json file in your project, for example in the tools/php-cs-fixer directory:

$ mkdir --parents tools/php-cs-fixer
$ composer require --working-dir=tools/php-cs-fixer friendsofphp/php-cs-fixer

For more details and other installation methods, see installation instructions.


Assuming you installed PHP CS Fixer as instructed above, you can run the following command to fix the files PHP files in the src directory:

$ tools/php-cs-fixer/vendor/bin/php-cs-fixer fix src

See usage, list of built-in rules, list of rule sets and configuration file documentation for more details.

If you need to apply code styles that are not supported by the tool, you can create custom rules.

Editor Integration

Dedicated plugins exist for:


The PHP CS Fixer is maintained on GitHub at Bug reports and ideas about new features are welcome there.

You can reach us at about the project, configuration, possible improvements, ideas and questions, please visit us!

Who is behind the PHP Coding Standards Fixer?

The PHP Coding Standards Fixer is brought to you by Fabien Potencier, the creator of the Symfony framework, and Dariusz Rumiński. It is released under the MIT license.

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