A curated list of amazingly awesome PHP Coding Standards & Code Sniffers/Fixers of various focus areas and styles.

Order is alphabetical.

• Tools
• Code Sniffers/Fixers
  • Framework specific
  • Other
  • Helpers
• Resources

• PHP_CodeSniffer - Tokenizer based sniffer and fixer tool for various PHP Coding standards.
• PHP-CS-Fixer - A tool to automatically fix PHP Coding Standards issues.

Coding standards for a specific framework

• CakePHP - Official package for CakePHP.
• Laminas - The coding standard ruleset for Laminas components.
• Laravel - PHPCS coding-standard for Laravel applications and packages.
• WordPress/WordPress-Coding-Standards - PHP_CodeSniffer rules (sniffs) to enforce WordPress coding conventions.

Collection of packages for the tools listed above

• easy-coding-standard/easy-coding-standard - Prepared sets for both PHPCS and PHP-CS-Fixer.
• php-collective/code-sniffer - A powerful and opioniated sniffer ruleset on top of existing PSRs.
• PHPCompatibility/PHPCompatibility - Collection of sniffer rules.
• PHPCSStandards/PHPCSExtra - A collection of code standards and sniffers for use with PHP_CodeSniffer.
• slevomat/coding-standard - Provides many useful sniffs.
• webimpress/coding-standard - Webimpress Coding Standard for PHPCS.

Helper utilities or libraries around the use of sniffer or fixer collections

• PHPCSStandards/PHPCSUtils - A suite of utility functions for use with PHP_CodeSniffer.

• PSR-1 - Basic Coding Standard.
• PSR-2 - Coding Style Guide {deprecated}.
• PSR-12 - Extends, expands and replaces PSR-2, the coding style guide.
• PER 2.0 - Latest successor of PSR standards (extends, expands and replaces PSR-12).