PHP Code Sniffer with WordPress Coding Standards and Atom

CLI.sh

#Install PHP CodeSniffer
brew install homebrew/php/php-code-sniffer #if using Homebrew
git clone https://github.com/squizlabs/PHP_CodeSniffer.git phpcs #if you want to do it directly

#Install WordPress Coding Standards
git clone -b master https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards.git wpcs

#Add WordPress standards to PHPCS config
phpcs -i #shows the libraries installed
phpcs --config-set installed_paths <path to dir that you cloned>/wpcs

config.json

"linter-phpcs":
  executablePath: "/usr/local/bin/phpcs"
  codeStandardOrConfigFile: "WordPress"
  tabWidth: 4