1. mkdir --parents tools/php-cs-fixer 2. docker run --rm --interactive --tty --volume $PWD:/app composer require --working-dir=tools/php-cs-fixer friendsofphp/php-cs-fixersudo 3. cp ~/tools/php-cs-fixer/vendor/bin/php-cs-fixer /usr/bin/ you need php installed

https://github.com/FriendsOfPhp/PHP-CS-Fixer

just use this docker docker run --rm --interactive --tty --volume $PWD:/project herloct/php-cs-fixer fix foo.php 12.12.21

https://github.com/herloct/docker-php-cs-fixer

2 spaces indentation instead 4 or tab docker run --rm --interactive --tty --volume $PWD:/project herloct/php-cs-fixer --rules=@PSR2 fix bwc.php 12.12.21

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