Updated: 23 September 2026
PHP_CodeSniffer
https://github.com/squizlabs/PHP_CodeSniffer
phpcs (code sniffer) and phpcbf (code beautifier, fixer)
phpcs scans and lists errors
phpcbf rewrites code to match a ruleset.
A set of rules for PHP_CodeSniffer https://github.com/WordPress/WordPress-Coding-Standards
PHP Coding Standards Fixer
https://cs.symfony.com/
https://github.com/PHP-CS-Fixer/PHP-CS-Fixer