Nette Coding Standard code checker & fixer

Introduction

Nette Coding Standard checks and automatically fixes your PHP code so that it follows the Nette coding standard – from indentation and braces to spacing and the ordering of imports.

Under the hood it combines two industry-standard tools, PHP CS Fixer and PHP_CodeSniffer, preconfigured with the full Nette rule set, so you don't have to configure anything yourself. It also ships rules for the latest PHP versions and applies them incrementally based on the PHP version your project uses.

It runs as a standalone application, not as a project dependency, which keeps its many dependencies away from your own.

Documentation can be found on the website. If you like it, please make a donation now. Thank you!

Installation

Install it globally via Composer:

composer global require nette/coding-standard

Make sure your global Composer bin directory is in your PATH. The ecs command is then available from anywhere, on any operating system.

Alternatively, install it as a standalone project, which is handy for pinning a specific version in CI:

composer create-project nette/coding-standard

It requires PHP 8.0 or higher.

Usage

The tool provides two commands. The check command runs in read-only mode and only reports violations, while fix repairs them automatically:

ecs check
ecs fix

Without any arguments it scans the src and tests directories. You can also pass one or more of your own paths:

ecs check app bin

Back up your files first, or run fix on a clean working tree so you can review the changes afterwards with git diff.

In read-only mode the tool exits with a non-zero code when any violation is found, so it fits nicely into CI pipelines.

PHP Version

The tool supports PHP 8.0 to 8.5 and applies the rules incrementally according to the version. The version preset is detected automatically from your project's composer.json. If auto-detection is not possible, specify it manually:

ecs check --preset php81

Custom Configuration

You can tweak the rules per-project by placing ncs.php (PHP CS Fixer) and/or ncs.xml (PHP_CodeSniffer) in your project root. Both are discovered automatically and merged on top of the preset, with your values taking precedence.

ncs.php returns an associative array of fixer overrides:

<?php
return [
	'strict_comparison' => false,
	'PhpCsFixerCustomFixers/commented_out_function' => false, // don't comment out dump(), var_dump(), ...
];

ncs.xml is a PHP_CodeSniffer ruleset. It does not need to reference the version preset – that is added automatically – and you can use $presets/ to pull in any bundled preset:

<?xml version="1.0"?>
<ruleset name="MyProject">
	<!-- enable grouped `use function`/`use const` imports -->
	<rule ref="$presets/optimize-fn.xml"/>

	<!-- disable a rule -->
	<exclude name="SlevomatCodingStandard.TypeHints.ReturnTypeHint"/>

	<!-- override a rule's property -->
	<rule ref="NetteCodingStandard.WhiteSpace.FunctionSpacing">
		<properties>
			<property name="spacing" value="1"/>
		</properties>
	</rule>
</ruleset>

Ad-hoc Configuration via --config-file

For one-off runs (e.g. when you want to keep dump() calls intact during debugging) you can point to an additional config file without committing it to the project:

ecs fix src --config-file ./my-overrides.php

The tool is selected by extension: .php applies to PHP CS Fixer, .xml to PHP_CodeSniffer. You can pass --config-file twice to configure both tools. Project-level ncs.php/ncs.xml are still used; values from --config-file take precedence.

GitHub Actions

In a CI pipeline, install the tool as a project and run it from there:

# .github/workflows/coding-style.yml
steps:
    - uses: actions/checkout@v4
    - uses: shivammathur/setup-php@v2
      with:
          php-version: 8.1

    - run: composer create-project nette/coding-standard temp/coding-standard
    - run: php temp/coding-standard/ecs check