PHP-CS-Fixer/README.rst

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 ``php-cs-fixer`` from anywhere on
your system:

.. code-block:: bash

    $ wget https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v1.12.2/php-cs-fixer.phar -O php-cs-fixer

or with curl:

.. code-block:: bash

    $ curl -L https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v1.12.2/php-cs-fixer.phar -o php-cs-fixer

then:

.. code-block:: bash

    $ 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:

.. code-block:: bash

    $ ./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:

.. code-block:: bash

    $ 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.

.. code-block:: bash

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

Update
------

Locally
~~~~~~~

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

.. code-block:: bash

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

Globally (manual)
~~~~~~~~~~~~~~~~~

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

.. code-block:: bash

    $ sudo php-cs-fixer self-update

Globally (Composer)
~~~~~~~~~~~~~~~~~~~

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

.. code-block:: bash

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

Globally (homebrew)
~~~~~~~~~~~~~~~~~~~

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

.. code-block:: bash

    $ 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:

.. code-block:: bash

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

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 fixers. When using the ``txt`` format it will also displays progress notifications.

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

.. code-block:: bash

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

By default, all PSR fixers are run.

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

.. code-block:: bash

    $ php php-cs-fixer.phar fix /path/to/dir --rules=unix_line_endings,full_opening_tag,no_tab_indentation

You can also blacklist the fixers you don't want by placing a dash in front of the fixer name, if this is more convenient,
using ``-name_of_fixer``:

.. code-block:: bash

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

When using combinations of exact and blacklist fixers, applying exact fixers along with above blacklisted results:

.. code-block:: bash

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

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 riskys fixer may run. Default value is taken from config file.
Risky fixer is a fixer, which could change code behaviour. By default no risky fixers are run.

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

.. code-block:: bash

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

Choose from the list of available fixers:

* **binary_operator_spaces** [@Symfony]
   Binary operators should be surrounded by at least one space.

* **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 blankline.

* **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.

* **cast_spaces** [@Symfony]
   A single space should be between cast and variable.

* **class_definition** [@PSR2, @Symfony]
   Whitespace around the key words of a class, trait or interfaces
   definition should be one space.

* **class_keyword_remove**
   Converts ::class keywords to FQCN strings.

* **combine_consecutive_unsets**
   Calling unset on multiple items should be done in one call.

* **concat_with_spaces**
   Concatenation should be used with at least one whitespace around.

* **concat_without_spaces** [@Symfony]
   Concatenation should be used without spaces.

* **declare_equal_normalize** [@Symfony]
   Equal sign in declare statement should not be surrounded by spaces.

* **declare_strict_types**
   Force strict types declaration in all files. (Risky fixer!)

* **dir_constant**
   Replaces dirname(__FILE__) expression with equivalent __DIR__ constant.
   (Risky fixer!)

* **echo_to_print**
   Converts echo language construct to print if possible.

* **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. (Risky
   fixer!)

* **full_opening_tag** [@PSR1, @PSR2, @Symfony]
   PHP code must use the long <?php ?> tags or the short-echo <?= ?> tags;
   it must not use the other tag variations.

* **function_declaration** [@PSR2, @Symfony]
   Spaces should be properly placed in a function declaration.

* **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.

* **general_phpdoc_annotation_rename**
   Configured annotations inside phpdocs should be renamed.

* **hash_to_slash_comment** [@Symfony]
   Single line comments should use double slashes (//) and not hash (#).

* **header_comment**
   Add, replace or remove header comment.

* **heredoc_to_nowdoc** [@Symfony]
   Convert heredoc to nowdoc if possible.

* **include** [@Symfony]
   Include/Require and file path should be divided with a single space.
   File path should not be placed under brackets.

* **linebreak_after_opening_tag**
   Ensure there is no code on the same line as the PHP open tag.

* **long_array_syntax**
   Arrays should use the long syntax.

* **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.
   (Risky fixer!)

* **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, boolval functions calls
   with according type casting operator. (Risky fixer!)

* **native_function_casing** [@Symfony]
   Function defined by PHP should be called using the correct casing.

* **new_with_braces** [@Symfony]
   All instances created with new keyword must be followed by braces.

* **no_alias_functions** [@Symfony]
   Master functions shall be used instead of aliases.

* **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 an 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.

* **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_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. (Risky fixer!)

* **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.

* **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_tab_indentation** [@PSR2, @Symfony]
   Code MUST use an indent of 4 spaces, and MUST NOT use tabs for
   indenting.

* **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.

* **no_unreachable_default_argument_value** [@Symfony]
   In method arguments there must not be arguments with default values
   before non-default ones.

* **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.

* **ordered_imports**
   Ordering use statements.

* **php_unit_construct** [@Symfony:risky]
   PHPUnit assertion method calls like "->assertSame(true, $foo)" should be
   written with dedicated method like "->assertTrue($foo)". (Risky fixer!)

* **php_unit_dedicate_assert** [@Symfony:risky]
   PHPUnit assertions like "assertInternalType", "assertFileExists", should
   be used over "assertTrue". (Risky fixer!)

* **php_unit_strict**
   PHPUnit methods like "assertSame" should be used instead of
   "assertEquals". (Risky fixer!)

* **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 end with a full stop.

* **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_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_order**
   Annotations in phpdocs should be ordered so that param annotations come
   first, then throws annotations, then return annotations.

* **phpdoc_property**
   @property tags should be used rather than other variants.

* **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_type_to_var** [@Symfony]
   @type should always be written as @var.

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

* **phpdoc_var_to_type**
   @var should always be written as @type.

* **phpdoc_var_without_name** [@Symfony]
   @var and @type annotations should not contain the variable name.

* **pow_to_exponentiation** [@PHP56Migration, @PHP70Migration, @PHP71Migration]
   Converts 'pow()' to '**'. (Risky fixer!)

* **pre_increment** [@Symfony]
   Pre incrementation/decrementation should be used if possible.

* **print_to_echo** [@Symfony]
   Converts print language construct to echo if 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. (Risky
   fixer!)

* **psr4**
   Class names should match the file name. (Risky fixer!)

* **random_api_migration** [@PHP70Migration, @PHP71Migration]
   Replaces rand, srand, getrandmax functions calls with their mt_*
   analogs. (Risky fixer!)

* **return_type_declaration** [@Symfony]
   There should be no space before colon and one space after it in return
   type declaration.

* **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_array_syntax**
   PHP arrays should use the PHP 5.4 short-syntax.

* **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. (Risky fixer!)

* **simplified_null_return**
   A return statement wishing to return nothing should be simply "return".

* **single_blank_line_at_eof** [@PSR2, @Symfony]
   A file 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.

* **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**
   Comparison should be strict. (Risky fixer!)

* **strict_param**
   Functions should be used with $strict param. (Risky fixer!)

* **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.

* **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.

* **unix_line_endings** [@PSR2, @Symfony]
   All PHP files must use the Unix LF line ending.

* **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.

* **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:

.. code-block:: bash

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

Instead of using command line options to customize the fixer, 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 fixers to the default list of PSR2 set fixers:

.. code-block:: php

    <?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,
            'short_array_syntax' => true,
        ))
        ->finder($finder)
    ;

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

See `Symfony\\Finder <http://symfony.com/doc/current/components/finder.html>`_
online documentation for other `Finder` methods.

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

.. code-block:: php

    <?php

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

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

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 fixers 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:

.. code-block:: php

    <?php

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

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

.. code-block:: php

    <?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:

.. code-block:: bash

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

Then, add the following command to your CI:

.. code-block:: bash

    $ vendor/bin/php-cs-fixer fix --config=.php_cs.dist -v --dry-run --using-cache=no --path-mode=intersection `git diff --name-only --diff-filter=ACMRTUXB $COMMIT_RANGE`

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
*  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

Helpers
-------

Dedicated plugins exist for:

* `Atom`_
* `NetBeans`_
* `PhpStorm`_
* `Sublime Text`_
* `Vim`_

Contribute
----------

The tool comes with quite a few built-in fixers and finders, 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).

.. _php-cs-fixer.phar: https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v1.12.2/php-cs-fixer.phar
.. _Atom:              https://github.com/Glavin001/atom-beautify
.. _NetBeans:          http://plugins.netbeans.org/plugin/49042/php-cs-fixer
.. _PhpStorm:          http://tzfrs.de/2015/01/automatically-format-code-to-match-psr-standards-with-phpstorm
.. _Sublime Text:      https://github.com/benmatselby/sublime-phpcs
.. _Vim:               https://github.com/stephpy/vim-php-cs-fixer
.. _contribute:        https://github.com/FriendsOfPhp/php-cs-fixer/blob/master/CONTRIBUTING.md