Fork me on GitHub
a Sensio Labs Product

7th Gear (v3.59.3) edition


The fix command

The fix command tries to fix as much coding standards problems as possible.

With config file created, you can run command as easy as:

php php-cs-fixer.phar fix

If you do not have config file, you can run following command to fix non-hidden, non-vendor/ PHP files with default ruleset @PSR12:

php php-cs-fixer.phar fix .

You can also fix files in parallel, utilising more CPU cores. You can do this by using config class that implements PhpCsFixer\Runner\Parallel\ParallelConfig\ParallelAwareConfigInterface, and use setParallelConfig() method. Recommended way is to utilise auto-detecting parallel configuration:


return (new PhpCsFixer\Config())

However, in some case you may want to fine-tune parallelisation with explicit values (e.g. in environments where auto-detection does not work properly and suggests more cores than it should):


return (new PhpCsFixer\Config())
    ->setParallelConfig(new PhpCsFixer\Runner\Parallel\ParallelConfig(4, 20))

You can limit process to given file or files in a given directory and its subdirectories:

php php-cs-fixer.phar fix /path/to/dir
php php-cs-fixer.phar fix /path/to/file

By default --path-mode is set to override, which means, that if you specify the path to a file or a directory via command arguments, then the paths provided to a Finder in config file will be ignored. You can also use --path-mode=intersection, which will use the intersection of the paths from the config file and from the argument:

php php-cs-fixer.phar fix --path-mode=intersection /path/to/dir

The --format option for the output format. Supported formats are txt (default one), checkstyle, gitlab, json, junit and xml.

NOTE: the output for the following formats are generated in accordance with schemas

The --quiet Do not output any message.

The --verbose option will show the applied rules. When using the txt format it will also display progress output (progress bar by default, but can be changed using --show-progress option).

NOTE: if there is an error like “errors reported during linting after fixing”, you can use this to be even more verbose for debugging purpose

  • -v: verbose

  • -vv: very verbose

  • -vvv: debug

The --rules option limits the rules to apply to the project:

php php-cs-fixer.phar fix /path/to/project --rules=@PSR12

By default the PSR12 rules are used. If the --rules option is used rules from config files are ignored.

The --rules option lets you choose the exact rules to apply (the rule names must be separated by a comma):

php php-cs-fixer.phar fix /path/to/dir --rules=line_ending,full_opening_tag,indentation_type

You can also exclude the rules you don’t want by placing a dash in front of the rule name, if this is more convenient, using -name_of_fixer:

php php-cs-fixer.phar fix /path/to/dir --rules=-full_opening_tag,-indentation_type

When using combinations of exact and exclude rules, applying exact rules along with above excluded results:

php php-cs-fixer.phar fix /path/to/project --rules=@Symfony,-@PSR1,-blank_line_before_statement,strict_comparison

Complete configuration for rules can be supplied using a json formatted string.

php php-cs-fixer.phar fix /path/to/project --rules='{"concat_space": {"spacing": "none"}}'

The --dry-run flag will run the fixer without making changes to your files (implicitly set when you use check command).

The --sequential flag will enforce sequential analysis even if parallel config is provided.

The --diff flag can be used to let the fixer output all the changes it makes in udiff format.

The --allow-risky option (pass yes or no) allows you to set whether risky rules may run. Default value is taken from config file. A rule is considered risky if it could change code behaviour. By default no risky rules are run.

The --stop-on-violation flag stops the execution upon first file that needs to be fixed.

The --show-progress option allows you to choose the way process progress is rendered:

  • none: disables progress output;

  • dots: multiline progress output with number of files and percentage on each line. Note that with this option, the files list is evaluated before processing to get the total number of files and then kept in memory to avoid using the file iterator twice. This has an impact on memory usage so using this option is not recommended on very large projects;

  • bar: single line progress output with number of files and calculated percentage. Similar to dots output, it has to evaluate files list twice;

If the option is not provided, it defaults to bar unless a config file that disables output, or non-txt reporter is used, then it defaults to none.

php php-cs-fixer.phar fix --verbose --show-progress=dots

The command can also read from standard input, in which case it won’t automatically fix anything:

cat foo.php | php php-cs-fixer.phar fix --diff -

Finally, if you don’t need BC kept on CLI level, you might use PHP_CS_FIXER_FUTURE_MODE to start using options that would be default in next MAJOR release and to forbid using deprecated configuration:

PHP_CS_FIXER_FUTURE_MODE=1 php php-cs-fixer.phar fix -v --diff

The --dry-run option displays the files that need to be fixed but without actually modifying them:

php php-cs-fixer.phar fix /path/to/code --dry-run

By using --using-cache option with yes or no you can set if the caching mechanism should be used.

The check command

This command is a shorthand for fix --dry-run and offers all the options and arguments as fix command. The only difference is that check command won’t apply any changes, but will only print analysis result.

The list-files command

The list-files command will list all files which need fixing.

php php-cs-fixer.phar list-files

The --config option can be used, like in the fix command, to tell from which path a config file should be loaded.

php php-cs-fixer.phar list-files --config=.php-cs-fixer.dist.php

The output is built in a form that its easy to use in combination with xargs command in a linux pipe. This can be useful e.g. in situations where the caching mechanism might not be available (CI, Docker) and distribute fixing across several processes might speedup the process.

Note: You need to pass the config to the fix command, in order to make it work with several files being passed by list-files.

php php-cs-fixer.phar list-files --config=.php-cs-fixer.dist.php | xargs -n 50 -P 8 php php-cs-fixer.phar fix --config=.php-cs-fixer.dist.php --path-mode intersection -v
  • -n defines how many files a single subprocess process

  • -P defines how many subprocesses the shell is allowed to spawn for parallel processing (usually similar to the number of CPUs your system has)

Rule descriptions

Use the following command to quickly understand what a rule will do to your code:

php php-cs-fixer.phar describe align_multiline_comment

To visualize all the rules that belong to a ruleset:

php php-cs-fixer.phar describe @PSR2


The caching mechanism is enabled by default. This will speed up further runs by fixing only files that were modified since the last run. The tool will fix all files if the tool version has changed or the list of rules has changed. The cache is supported only when the tool was downloaded as a PHAR file, executed within pre-built Docker image or installed via Composer. The cache is written to the drive progressively, so do not be afraid of interruption - rerun the command and start where you left. The cache mechanism also supports executing the command in parallel.

Cache can be disabled via --using-cache option or config file:


$config = new PhpCsFixer\Config();
return $config->setUsingCache(false);

Cache file can be specified via --cache-file option or config file:


$config = new PhpCsFixer\Config();
return $config->setCacheFile(__DIR__.'/.php-cs-fixer.cache');

Using PHP CS Fixer on CI

Require friendsofphp/php-cs-fixer as a dev dependency:

./composer.phar require --dev friendsofphp/php-cs-fixer

Then, add the following command to your CI:

CHANGED_FILES=$(git diff --name-only --diff-filter=ACMRTUXB "${COMMIT_RANGE}")
if ! echo "${CHANGED_FILES}" | grep -qE "^(\\.php-cs-fixer(\\.dist)?\\.php|composer\\.lock)$"; then EXTRA_ARGS=$(printf -- '--path-mode=intersection\n--\n%s' "${CHANGED_FILES}"); else EXTRA_ARGS=''; fi
vendor/bin/php-cs-fixer check --config=.php-cs-fixer.dist.php -v --stop-on-violation --using-cache=no ${EXTRA_ARGS}

Where $COMMIT_RANGE is your range of commits, e.g. $TRAVIS_COMMIT_RANGE or HEAD~..HEAD.

GitLab Code Quality Integration

If you want to integrate with GitLab’s Code Quality feature, in order for report to contain correct line numbers, you will need to use both --format=gitlab and --diff arguments.

Environment options

The PHP_CS_FIXER_IGNORE_ENV environment variable can be used to ignore any environment requirements. This includes requirements like missing PHP extensions, unsupported PHP versions or by using HHVM.

NOTE: Execution may be unstable when used.

PHP_CS_FIXER_IGNORE_ENV=1 php php-cs-fixer.phar fix /path/to/dir

Exit code

Exit code of the fix command is built using following bit flags:

  • 0 - OK.

  • 1 - General error (or PHP minimal requirement not matched).

  • 4 - Some files have invalid syntax (only in dry-run mode).

  • 8 - Some files need fixing (only in dry-run mode).

  • 16 - Configuration error of the application.

  • 32 - Configuration error of a Fixer.

  • 64 - Exception raised within the application.