PHP Coding Standards Fixer

The PHP Coding Standards Fixer tool fixes most issues in your code when you want to follow the PHP coding standards as defined in the PSR-1 and PSR-2 documents and many more.

If you are already using a linter to identify coding standards problems in your code, you know that fixing them by hand is tedious, especially on large projects. This tool does not only detect them, but also fixes them for you.

Requirements

PHP needs to be a minimum version of PHP 5.3.6.

Installation

Locally

Download the php-cs-fixer.phar file and store it somewhere on your computer.

Globally (manual)

You can run these commands to easily access latest php-cs-fixer from anywhere on your system:

$ wget http://cs.sensiolabs.org/download/php-cs-fixer-v2.phar -O php-cs-fixer

or with specified version:

$ wget https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v2.1.2/php-cs-fixer.phar -O php-cs-fixer

or with curl:

$ curl -L http://cs.sensiolabs.org/download/php-cs-fixer-v2.phar -o php-cs-fixer

then:

$ sudo chmod a+x php-cs-fixer
$ sudo mv php-cs-fixer /usr/local/bin/php-cs-fixer

Then, just run php-cs-fixer.

Globally (Composer)

To install PHP CS Fixer, install Composer and issue the following command:

$ ./composer.phar global require friendsofphp/php-cs-fixer

Then make sure you have ~/.composer/vendor/bin in your PATH and you're good to go:

$ export PATH="$PATH:$HOME/.composer/vendor/bin"

Globally (homebrew)

PHP-CS-Fixer is part of the homebrew-php project. Follow the installation instructions at https://github.com/homebrew/homebrew-php if you don't already have it.

$ brew install homebrew/php/php-cs-fixer

Update

Locally

The self-update command tries to update php-cs-fixer itself:

$ php php-cs-fixer.phar self-update

Globally (manual)

You can update php-cs-fixer through this command:

$ sudo php-cs-fixer self-update

Globally (Composer)

You can update php-cs-fixer through this command:

$ ./composer.phar global update friendsofphp/php-cs-fixer

Globally (homebrew)

You can update php-cs-fixer through this command:

$ brew upgrade php-cs-fixer

Usage

The fix command tries to fix as much coding standards problems as possible on a 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 use --path-mode=intersection to merge 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), json, xml and junit.

NOTE: When using junit format report generates in accordance with JUnit xml schema from Jenkins (see docs/junit-10.xsd).

The --verbose option will show the applied rules. When using the txt format it will also displays progress notifications.

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

$ php php-cs-fixer.phar fix /path/to/project --rules=@PSR2

By default the PSR1 and PSR2 rules are used.

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 blacklist 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 blacklist rules, applying exact rules along with above blacklisted results:

$ php php-cs-fixer.phar fix /path/to/project --rules=@Symfony,-@PSR1,-blank_line_before_return,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"}}'

A combination of --dry-run and --diff will display a summary of proposed fixes, leaving your files unchanged.

The --allow-risky option allows you to set whether risky rules may run. Default value is taken from config file. Risky rule is a rule, which could change code behaviour. By default no risky rules are run.

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

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 -

Choose from the list of available rules:

array_syntax

PHP arrays should be declared using the configured syntax (requires PHP

>= 5.4 for short syntax).

Rule is: configurable.
binary_operator_spaces [@Symfony]

Binary operators should be surrounded by at least one space.

Rule is: configurable.
blank_line_after_namespace [@PSR2, @Symfony]

There MUST be one blank line after the namespace declaration.
blank_line_after_opening_tag [@Symfony]

Ensure there is no code on the same line as the PHP open tag and it is

followed by a blank line.
blank_line_before_return [@Symfony]

An empty line feed should precede a return statement.
braces [@PSR2, @Symfony]

The body of each structure MUST be enclosed by braces. Braces should be

properly placed. Body of braces should be properly indented.

Rule is: configurable.
cast_spaces [@Symfony]

A single space should be between cast and variable.
class_definition [@PSR2, @Symfony]

Whitespace around the keywords of a class, trait or interfaces

definition should be one space.

Rule is: configurable.
class_keyword_remove

Converts ::class keywords to FQCN strings. Requires PHP >= 5.5.
combine_consecutive_unsets

Calling unset on multiple items should be done in one call.
concat_space [@Symfony]

Concatenation should be spaced according configuration.

Rule is: configurable.
declare_equal_normalize [@Symfony]

Equal sign in declare statement should be surrounded by spaces or not

following configuration.

Rule is: configurable.
declare_strict_types

Force strict types declaration in all files. Requires PHP >= 7.0.

Rule is: risky.
dir_constant

Replaces dirname(__FILE__) expression with equivalent __DIR__

constant.

Rule is: risky.
elseif [@PSR2, @Symfony]

The keyword elseif should be used instead of else if so that all

control keywords look like single words.
encoding [@PSR1, @PSR2, @Symfony]

PHP code MUST use only UTF-8 without BOM (remove BOM).
ereg_to_preg

Replace deprecated ereg regular expression functions with preg.

Rule is: risky.
full_opening_tag [@PSR1, @PSR2, @Symfony]

PHP code must use the long <?php tags or short-echo <?= tags and not

other tag variations.
function_declaration [@PSR2, @Symfony]

Spaces should be properly placed in a function declaration.

Rule is: configurable.
function_typehint_space [@Symfony]

Add missing space between function's argument and its typehint.
general_phpdoc_annotation_remove

Configured annotations should be omitted from phpdocs.

Rule is: configurable.
hash_to_slash_comment [@Symfony]

Single line comments should use double slashes // and not hash #.
header_comment

Add, replace or remove header comment.

Rule is: configurable.
heredoc_to_nowdoc

Convert heredoc to nowdoc where possible.
include [@Symfony]

Include/Require and file path should be divided with a single space.

File path should not be placed under brackets.
indentation_type [@PSR2, @Symfony]

Code MUST use configured indentation type.
is_null [@Symfony:risky]

Replaces is_null(parameter) expression with null === parameter.

Rule is: configurable, risky.
line_ending [@PSR2, @Symfony]

All PHP files must use same line ending.
linebreak_after_opening_tag

Ensure there is no code on the same line as the PHP open tag.
lowercase_cast [@Symfony]

Cast should be written in lower case.
lowercase_constants [@PSR2, @Symfony]

The PHP constants true, false, and null MUST be in lower case.
lowercase_keywords [@PSR2, @Symfony]

PHP keywords MUST be in lower case.
mb_str_functions

Replace non multibyte-safe functions with corresponding mb function.

Rule is: risky.
method_argument_space [@PSR2, @Symfony]

In method arguments and method call, there MUST NOT be a space before

each comma and there MUST be one space after each comma.
method_separation [@Symfony]

Methods must be separated with one blank line.
modernize_types_casting

Replaces intval, floatval, doubleval, strval and boolval

function calls with according type casting operator.

Rule is: risky.
native_function_casing [@Symfony]

Function defined by PHP should be called using the correct casing.
native_function_invocation

Add leading \ before function invocation of internal function to speed

up resolving.

Rule is: configurable, risky.
new_with_braces [@Symfony]

All instances created with new keyword must be followed by braces.
no_alias_functions [@Symfony:risky]

Master functions shall be used instead of aliases.

Rule is: risky.
no_blank_lines_after_class_opening [@Symfony]

There should be no empty lines after class opening brace.
no_blank_lines_after_phpdoc [@Symfony]

There should not be blank lines between docblock and the documented

element.
no_blank_lines_before_namespace

There should be no blank lines before a namespace declaration.
no_closing_tag [@PSR2, @Symfony]

The closing ?> tag MUST be omitted from files containing only PHP.
no_empty_comment [@Symfony]

There should not be any empty comments.
no_empty_phpdoc [@Symfony]

There should not be empty PHPDoc blocks.
no_empty_statement [@Symfony]

Remove useless semicolon statements.
no_extra_consecutive_blank_lines [@Symfony]

Removes extra blank lines and/or blank lines following configuration.

Rule is: configurable.
no_leading_import_slash [@Symfony]

Remove leading slashes in use clauses.
no_leading_namespace_whitespace [@Symfony]

The namespace declaration line shouldn't contain leading whitespace.
no_mixed_echo_print [@Symfony]

Either language construct print or echo should be used.

Rule is: configurable.
no_multiline_whitespace_around_double_arrow [@Symfony]

Operator => should not be surrounded by multi-line whitespaces.
no_multiline_whitespace_before_semicolons

Multi-line whitespace before closing semicolon are prohibited.
no_php4_constructor

Convert PHP4-style constructors to __construct.

Rule is: risky.
no_short_bool_cast [@Symfony]

Short cast bool using double exclamation mark should not be used.
no_short_echo_tag

Replace short-echo <?= with long format <?php echo syntax.
no_singleline_whitespace_before_semicolons [@Symfony]

Single-line whitespace before closing semicolon are prohibited.
no_spaces_after_function_name [@PSR2, @Symfony]

When making a method or function call, there MUST NOT be a space between

the method or function name and the opening parenthesis.
no_spaces_around_offset [@Symfony]

There MUST NOT be spaces around offset braces.

Rule is: configurable.
no_spaces_inside_parenthesis [@PSR2, @Symfony]

There MUST NOT be a space after the opening parenthesis. There MUST NOT

be a space before the closing parenthesis.
no_trailing_comma_in_list_call [@Symfony]

Remove trailing commas in list function calls.
no_trailing_comma_in_singleline_array [@Symfony]

PHP single-line arrays should not have trailing comma.
no_trailing_whitespace [@PSR2, @Symfony]

Remove trailing whitespace at the end of non-blank lines.
no_trailing_whitespace_in_comment [@PSR2, @Symfony]

There MUST be no trailing spaces inside comments and phpdocs.
no_unneeded_control_parentheses [@Symfony]

Removes unneeded parentheses around control statements.

Rule is: configurable.
no_unreachable_default_argument_value

In function arguments there must not be arguments with default values

before non-default ones.

Rule is: risky.
no_unused_imports [@Symfony]

Unused use statements must be removed.
no_useless_else

There should not be useless else cases.
no_useless_return

There should not be an empty return statement at the end of a function.
no_whitespace_before_comma_in_array [@Symfony]

In array declaration, there MUST NOT be a whitespace before each comma.
no_whitespace_in_blank_line [@Symfony]

Remove trailing whitespace at the end of blank lines.
normalize_index_brace [@Symfony]

Array index should always be written by using square braces.
not_operator_with_space

Logical NOT operators (!) should have leading and trailing

whitespaces.
not_operator_with_successor_space

Logical NOT operators (!) should have one trailing whitespace.
object_operator_without_whitespace [@Symfony]

There should not be space before or after object T_OBJECT_OPERATOR

->.
ordered_class_elements

Orders the elements of classes/interfaces/traits.

Rule is: configurable.
ordered_imports

Ordering use statements.

Rule is: configurable.
php_unit_construct [@Symfony:risky]

PHPUnit assertion method calls like "->assertSame(true, $foo)" should be

written with dedicated method like "->assertTrue($foo)".

Rule is: configurable, risky.
php_unit_dedicate_assert [@Symfony:risky]

PHPUnit assertions like "assertInternalType", "assertFileExists", should

be used over "assertTrue".

Rule is: configurable, risky.
php_unit_fqcn_annotation [@Symfony]

PHPUnit annotations should be a FQCNs including a root namespace.
php_unit_strict

PHPUnit methods like assertSame should be used instead of

assertEquals.

Rule is: configurable, risky.
phpdoc_add_missing_param_annotation

Phpdoc should contain @param for all params.

Rule is: configurable.
phpdoc_align [@Symfony]

All items of the @param, @throws, @return, @var, and @type phpdoc tags

must be aligned vertically.
phpdoc_annotation_without_dot [@Symfony]

Phpdocs annotation descriptions should not be a sentence.
phpdoc_indent [@Symfony]

Docblocks should have the same indentation as the documented subject.
phpdoc_inline_tag [@Symfony]

Fix phpdoc inline tags, make inheritdoc always inline.
phpdoc_no_access [@Symfony]

@access annotations should be omitted from phpdocs.
phpdoc_no_alias_tag [@Symfony]

No alias PHPDoc tags should be used.

Rule is: configurable.
phpdoc_no_empty_return [@Symfony]

@return void and @return null annotations should be omitted from

phpdocs.
phpdoc_no_package [@Symfony]

@package and @subpackage annotations should be omitted from phpdocs.
phpdoc_no_useless_inheritdoc [@Symfony]

Classy that does not inherit must not have inheritdoc tags.
phpdoc_order

Annotations in phpdocs should be ordered so that param annotations come

first, then throws annotations, then return annotations.
phpdoc_return_self_reference [@Symfony]

The type of @return annotations of methods returning a reference to

itself must the configured one.

Rule is: configurable.
phpdoc_scalar [@Symfony]

Scalar types should always be written in the same form. int not

integer, bool not boolean, float not real or double.
phpdoc_separation [@Symfony]

Annotations in phpdocs should be grouped together so that annotations of

the same type immediately follow each other, and annotations of a

different type are separated by a single blank line.
phpdoc_single_line_var_spacing [@Symfony]

Single line @var PHPDoc should have proper spacing.
phpdoc_summary [@Symfony]

Phpdocs summary should end in either a full stop, exclamation mark, or

question mark.
phpdoc_to_comment [@Symfony]

Docblocks should only be used on structural elements.
phpdoc_trim [@Symfony]

Phpdocs should start and end with content, excluding the very first and

last line of the docblocks.
phpdoc_types [@Symfony]

The correct case must be used for standard PHP types in phpdoc.
phpdoc_var_without_name [@Symfony]

@var and @type annotations should not contain the variable name.
pow_to_exponentiation [@PHP56Migration, @PHP70Migration, @PHP71Migration]

Converts pow() to the ** operator. Requires PHP >= 5.6.

Rule is: risky.
pre_increment [@Symfony]

Pre incrementation/decrementation should be used if possible.
protected_to_private

Converts protected variables and methods to private where possible.
psr0

Classes must be in a path that matches their namespace, be at least one

namespace deep and the class name should match the file name.

Rule is: configurable, risky.
psr4

Class names should match the file name.

Rule is: risky.
random_api_migration [@PHP70Migration, @PHP71Migration]

Replaces rand, mt_rand, srand, getrandmax functions calls with

their mt_* analogs.

Rule is: configurable, risky.
return_type_declaration [@Symfony]

There should be one or no space before colon, and one space after it in

return type declarations, according to configuration.

Rule is: configurable.
self_accessor [@Symfony]

Inside a classy element "self" should be preferred to the class name

itself.
semicolon_after_instruction

Instructions must be terminated with a semicolon.
short_scalar_cast [@Symfony]

Cast (boolean) and (integer) should be written as (bool) and

(int), (double) and (real) as (float).
silenced_deprecation_error [@Symfony:risky]

Ensures deprecation notices are silenced.

Rule is: risky.
simplified_null_return

A return statement wishing to return void should not return null.

Rule is: risky.
single_blank_line_at_eof [@PSR2, @Symfony]

A PHP file without end tag must always end with a single empty line

feed.
single_blank_line_before_namespace [@Symfony]

There should be exactly one blank line before a namespace declaration.
single_class_element_per_statement [@PSR2, @Symfony]

There MUST NOT be more than one property or constant declared per

statement.

Rule is: configurable.
single_import_per_statement [@PSR2, @Symfony]

There MUST be one use keyword per declaration.
single_line_after_imports [@PSR2, @Symfony]

Each namespace use MUST go on its own line and there MUST be one blank

line after the use statements block.
single_quote [@Symfony]

Convert double quotes to single quotes for simple strings.
space_after_semicolon [@Symfony]

Fix whitespace after a semicolon.
standardize_not_equals [@Symfony]

Replace all <> with !=.
strict_comparison

Comparisons should be strict.

Rule is: risky.
strict_param

Functions should be used with $strict param set to true.

Rule is: risky.
switch_case_semicolon_to_colon [@PSR2, @Symfony]

A case should be followed by a colon and not a semicolon.
switch_case_space [@PSR2, @Symfony]

Removes extra spaces between colon and case value.
ternary_operator_spaces [@Symfony]

Standardize spaces around ternary operator.
ternary_to_null_coalescing

Use null coalescing operator ?? where possible.
trailing_comma_in_multiline_array [@Symfony]

PHP multi-line arrays should have a trailing comma.
trim_array_spaces [@Symfony]

Arrays should be formatted like function/method arguments, without

leading or trailing single line space.
unary_operator_spaces [@Symfony]

Unary operators should be placed adjacent to their operands.
visibility_required [@PSR2, @Symfony, @PHP71Migration]

Visibility MUST be declared on all properties and methods; abstract and

final MUST be declared before the visibility; static MUST be declared

after the visibility.

Rule is: configurable.
whitespace_after_comma_in_array [@Symfony]

In array declaration, there MUST be a whitespace after each comma.

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

Instead of using command line options to customize the rule, you can save the project configuration in a .php_cs.dist file in the root directory of your project. The file must return an instance of PhpCsFixer\ConfigInterface, which lets you configure the rules, the files and directories that need to be analyzed. You may also create .php_cs file, which is the local configuration that will be used instead of the project configuration. It is a good practice to add that file into your .gitignore file. With the --config option you can specify the path to the .php_cs file.

The example below will add two rules to the default list of PSR2 set rules:

<?php

$finder = PhpCsFixer\Finder::create()
    ->exclude('somedir')
    ->notPath('src/Symfony/Component/Translation/Tests/fixtures/resources.php')
    ->in(__DIR__)
;

return PhpCsFixer\Config::create()
    ->setRules(array(
        '@PSR2' => true,
        'strict_param' => true,
        'array_syntax' => array('syntax' => 'short'),
    ))
    ->setFinder($finder)
;

NOTE: exclude will work only for directories, so if you need to exclude file, try notPath.

See Symfony\Finder online documentation for other Finder methods.

You may also use a blacklist for the rules instead of the above shown whitelist approach. The following example shows how to use all Symfony rules but the full_opening_tag rule.

<?php

$finder = PhpCsFixer\Finder::create()
    ->exclude('somedir')
    ->in(__DIR__)
;

return PhpCsFixer\Config::create()
    ->setRules(array(
        '@Symfony' => true,
        'full_opening_tag' => false,
    ))
    ->setFinder($finder)
;

You may want to use non-linux whitespaces in your project. Then you need to configure them in your config file. Please be aware that this feature is experimental.

<?php

return PhpCsFixer\Config::create()
    ->setIndent("\t")
    ->setLineEnding("\r\n")
;

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

Caching

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. Cache is supported only for tool downloaded as phar file or installed via composer.

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

<?php

return PhpCsFixer\Config::create()
    ->setUsingCache(false)
;

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

<?php

return PhpCsFixer\Config::create()
    ->setCacheFile(__DIR__.'/.php_cs.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:

$ IFS=$'\n'; COMMIT_SCA_FILES=($(git diff --name-only --diff-filter=ACMRTUXB "${COMMIT_RANGE}")); unset IFS
$ vendor/bin/php-cs-fixer fix --config=.php_cs.dist -v --dry-run --stop-on-violation --using-cache=no --path-mode=intersection "${COMMIT_SCA_FILES[@]}"

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

Exit codes

Exit code is build using following bit flags:

0 OK.
1 General error (or PHP/HHVM 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.

(applies to exit codes of the fix command only)

Helpers

Dedicated plugins exist for:

Contribute

The tool comes with quite a few built-in fixers, but everyone is more than welcome to contribute more of them.

Fixers

A fixer is a class that tries to fix one CS issue (a Fixer class must implement FixerInterface).

Configs

A config knows about the CS rules and the files and directories that must be scanned by the tool when run in the directory of your project. It is useful for projects that follow a well-known directory structures (like for Symfony projects for instance).

felixgomez/PHP-CS-Fixer

PHP Coding Standards Fixer

Requirements

Installation

Locally

Globally (manual)

Globally (Composer)

Globally (homebrew)

Update

Locally

Globally (manual)

Globally (Composer)

Globally (homebrew)

Usage

Caching

Using PHP CS Fixer on CI

Exit codes

Helpers

Contribute

Fixers

Configs