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# PHP_CodeSniffer
<div aria-hidden="true">
[](https://github.com/PHPCSStandards/PHP_CodeSniffer/releases)
[](https://github.com/PHPCSStandards/PHP_CodeSniffer/actions/workflows/validate.yml)
[][GHA-test]
[](https://coveralls.io/github/PHPCSStandards/PHP_CodeSniffer?branch=3.x)
[](https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt)
[][GHA-test]
[GHA-test]: https://github.com/PHPCSStandards/PHP_CodeSniffer/actions/workflows/test.yml
</div>
> [!NOTE]
> This package is the official continuation of the now abandoned [PHP_CodeSniffer package which was created by Squizlabs](https://github.com/squizlabs/PHP_CodeSniffer).
## About
PHP_CodeSniffer is a set of two PHP scripts; the main `phpcs` script that tokenizes PHP, JavaScript and CSS files to detect violations of a defined coding standard, and a second `phpcbf` script to automatically correct coding standard violations. PHP_CodeSniffer is an essential development tool that ensures your code remains clean and consistent.
## Requirements
PHP_CodeSniffer requires PHP version 5.4.0 or greater, although individual sniffs may have additional requirements such as external applications and scripts. See the [Configuration Options manual page](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki/Configuration-Options) for a list of these requirements.
If you're using PHP_CodeSniffer as part of a team, or you're running it on a [CI](https://en.wikipedia.org/wiki/Continuous_integration) server, you may want to configure your project's settings [using a configuration file](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki/Advanced-Usage#using-a-default-configuration-file).
## Installation
The easiest way to get started with PHP_CodeSniffer is to download the Phar files for each of the commands:
```bash
# Download using curl
curl -OL https://phars.phpcodesniffer.com/phpcs.phar
curl -OL https://phars.phpcodesniffer.com/phpcbf.phar
# Or download using wget
wget https://phars.phpcodesniffer.com/phpcs.phar
wget https://phars.phpcodesniffer.com/phpcbf.phar
# Then test the downloaded PHARs
php phpcs.phar -h
php phpcbf.phar -h
```
These Phars are signed with the official Release key for PHPCS with the
fingerprint `D91D 8696 3AF3 A29B 6520 4622 97B0 2DD8 E507 1466`.
As of PHP_CodeSniffer 3.10.3, the provenance of PHAR files associated with a release can be verified via [GitHub Artifact Attestations](https://docs.github.com/en/actions/how-tos/secure-your-work/use-artifact-attestations/use-artifact-attestations) using the [GitHub CLI tool](https://cli.github.com/) with the following command: `gh attestation verify [phpcs|phpcbf].phar -o PHPCSStandards`.
### Composer
If you use Composer, you can install PHP_CodeSniffer system-wide with the following command:
```bash
composer global require "squizlabs/php_codesniffer=*"
```
Make sure you have the composer bin dir in your PATH. The default value is `~/.composer/vendor/bin/`, but you can check the value that you need to use by running `composer global config bin-dir --absolute`.
Or alternatively, include a dependency for `squizlabs/php_codesniffer` in your `composer.json` file. For example:
```json
{
"require-dev": {
"squizlabs/php_codesniffer": "^3.0"
}
}
```
You will then be able to run PHP_CodeSniffer from the vendor bin directory:
```bash
./vendor/bin/phpcs -h
./vendor/bin/phpcbf -h
```
### Phive
If you use Phive, you can install PHP_CodeSniffer as a project tool using the following commands:
```bash
phive install --trust-gpg-keys D91D86963AF3A29B6520462297B02DD8E5071466 phpcs
phive install --trust-gpg-keys D91D86963AF3A29B6520462297B02DD8E5071466 phpcbf
```
You will then be able to run PHP_CodeSniffer from the `tools` directory:
```bash
./tools/phpcs -h
./tools/phpcbf -h
```
### Git Clone
You can also download the PHP_CodeSniffer source and run the `phpcs` and `phpcbf` commands directly from the Git clone:
```bash
git clone https://github.com/PHPCSStandards/PHP_CodeSniffer.git
cd PHP_CodeSniffer
php bin/phpcs -h
php bin/phpcbf -h
```
## Getting Started
The default coding standard used by PHP_CodeSniffer is the PEAR coding standard. To check a file against the PEAR coding standard, simply specify the file's location:
```bash
phpcs /path/to/code/myfile.php
```
Or if you wish to check an entire directory you can specify the directory location instead of a file.
```bash
phpcs /path/to/code-directory
```
If you wish to check your code against the PSR-12 coding standard, use the `--standard` command line argument:
```bash
phpcs --standard=PSR12 /path/to/code-directory
```
If PHP_CodeSniffer finds any coding standard errors, a report will be shown after running the command.
Full usage information and example reports are available on the [usage page](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki/Usage).
## Documentation
The documentation for PHP_CodeSniffer is available on the [GitHub wiki](https://github.com/PHPCSStandards/PHP_CodeSniffer/wiki).
## Issues
Bug reports and feature requests can be submitted on the [GitHub Issue Tracker](https://github.com/PHPCSStandards/PHP_CodeSniffer/issues).
## Contributing
See [CONTRIBUTING.md](.github/CONTRIBUTING.md) for information.
## Versioning
PHP_CodeSniffer uses a `MAJOR.MINOR.PATCH` version number format.
The `MAJOR` version is incremented when:
- backwards-incompatible changes are made to how the `phpcs` or `phpcbf` commands are used, or
- backwards-incompatible changes are made to the `ruleset.xml` format, or
- backwards-incompatible changes are made to the API used by sniff developers, or
- custom PHP_CodeSniffer token types are removed, or
- existing sniffs are removed from PHP_CodeSniffer entirely
The `MINOR` version is incremented when:
- new backwards-compatible features are added to the `phpcs` and `phpcbf` commands, or
- backwards-compatible changes are made to the `ruleset.xml` format, or
- backwards-compatible changes are made to the API used by sniff developers, or
- new sniffs are added to an included standard, or
- existing sniffs are removed from an included standard
> NOTE: Backwards-compatible changes to the API used by sniff developers will allow an existing sniff to continue running without producing fatal errors but may not result in the sniff reporting the same errors as it did previously without changes being required.
The `PATCH` version is incremented when:
- backwards-compatible bug fixes are made
> NOTE: As PHP_CodeSniffer exists to report and fix issues, most bugs are the result of coding standard errors being incorrectly reported or coding standard errors not being reported when they should be. This means that the messages produced by PHP_CodeSniffer, and the fixes it makes, are likely to be different between PATCH versions.