PHP-CS-Fixer/README.rst

PHP Coding Standards Fixer
==========================

The PHP Coding Standards Fixer (PHP CS Fixer) tool fixes your code to follow standards;
whether you want to follow PHP coding standards as defined in the PSR-1, PSR-2, etc.,
or other community driven ones like the Symfony one.
You can **also** define your (team's) style through configuration.

It can modernize your code (like converting the ``pow`` function to the ``**`` operator on PHP 5.6)
and (micro) optimize it.

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.

The PHP CS Fixer is maintained on GitHub at https://github.com/FriendsOfPHP/PHP-CS-Fixer
bug reports and ideas about new features are welcome there.

You can talk to us at https://gitter.im/PHP-CS-Fixer/Lobby about the project,
configuration, possible improvements, ideas and questions, please visit us!

Requirements
------------

PHP needs to be a minimum version of PHP 5.6.0.

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:

.. code-block:: bash

    $ wget https://cs.symfony.com/download/php-cs-fixer-v2.phar -O php-cs-fixer

or with specified version:

.. code-block:: bash

    $ wget https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases/download/v2.16.1/php-cs-fixer.phar -O php-cs-fixer

or with curl:

.. code-block:: bash

    $ curl -L https://cs.symfony.com/download/php-cs-fixer-v2.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 <https://getcomposer.org/download/>`_ and issue the following command:

.. code-block:: bash

    $ composer global require friendsofphp/php-cs-fixer

Then make sure you have the global Composer binaries directory in your ``PATH``. This directory is platform-dependent, see `Composer documentation <https://getcomposer.org/doc/03-cli.md#composer-home>`_ for details. Example for some Unix systems:

.. code-block:: bash

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

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

.. code-block:: bash

    $ brew install php-cs-fixer

Locally (PHIVE)
~~~~~~~~~~~~~~~

Install `PHIVE <https://phar.io>`_ and issue the following command:

.. code-block:: bash

    $ phive install php-cs-fixer # use `--global` for global install

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

Locally (PHIVE)
~~~~~~~~~~~~~~~

.. code-block:: bash

    $ phive update 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

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:

.. code-block:: bash

    $ 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``, ``checkstyle``, ``junit`` and ``gitlab``.

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

* ``junit`` follows the `JUnit xml schema from Jenkins </doc/junit-10.xsd>`_
* ``checkstyle`` follows the common `"checkstyle" xml schema </doc/checkstyle.xsd>`_

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 notifications.

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

* ``--verbose=0`` or no option: normal
* ``--verbose``, ``--verbose=1``, ``-v``: verbose
* ``--verbose=2``, ``-vv``: very verbose
* ``--verbose=3``, ``-vvv``: debug

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

.. code-block:: bash

    $ 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):

.. code-block:: bash

    $ 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``:

.. code-block:: bash

    $ 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:

.. code-block:: bash

    $ 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.

.. code-block:: bash

    $ 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.

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

The ``--diff-format`` option allows to specify in which format the fixer should output the changes it makes:

* ``udiff``: unified diff format;
* ``sbd``: Sebastianbergmann/diff format (default when using `--diff` without specifying `diff-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;
* ``run-in``: [deprecated] simple single-line progress output;
* ``estimating``: [deprecated] 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;
* ``estimating-max``: [deprecated] same as ``dots``;
* ``dots``: same as ``estimating`` but using all terminal columns instead of default 80.

If the option is not provided, it defaults to ``run-in`` unless a config file that disables output is used, in which case it defaults to ``none``. This option has no effect if the verbosity of the command is less than ``verbose``.

.. code-block:: bash

    $ php php-cs-fixer.phar fix --verbose --show-progress=estimating

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 -

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 (unified differ, estimating, full-width progress indicator):

.. code-block:: bash

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

Choose from the list of available rules:

* **align_multiline_comment** [@PhpCsFixer]

  Each line of multi-line DocComments must have an asterisk [PSR-5] and
  must be aligned with the first one.

  Configuration options:

  - ``comment_type`` (``'all_multiline'``, ``'phpdocs_like'``, ``'phpdocs_only'``): whether
    to fix PHPDoc comments only (``phpdocs_only``), any multi-line comment
    whose lines all start with an asterisk (``phpdocs_like``) or any
    multi-line comment (``all_multiline``); defaults to ``'phpdocs_only'``

* **array_indentation** [@PhpCsFixer]

  Each element of an array must be indented exactly once.

* **array_syntax** [@Symfony, @PhpCsFixer]

  PHP arrays should be declared using the configured syntax.

  Configuration options:

  - ``syntax`` (``'long'``, ``'short'``): whether to use the ``long`` or ``short`` array
    syntax; defaults to ``'long'``

* **backtick_to_shell_exec** [@Symfony, @PhpCsFixer]

  Converts backtick operators to ``shell_exec`` calls.

* **binary_operator_spaces** [@Symfony, @PhpCsFixer]

  Binary operators should be surrounded by space as configured.

  Configuration options:

  - ``align_double_arrow`` (``false``, ``null``, ``true``): whether to apply, remove or
    ignore double arrows alignment; defaults to ``false``. DEPRECATED: use
    options ``operators`` and ``default`` instead
  - ``align_equals`` (``false``, ``null``, ``true``): whether to apply, remove or ignore
    equals alignment; defaults to ``false``. DEPRECATED: use options
    ``operators`` and ``default`` instead
  - ``default`` (``'align'``, ``'align_single_space'``, ``'align_single_space_minimal'``,
    ``'no_space'``, ``'single_space'``, ``null``): default fix strategy; defaults to
    ``'single_space'``
  - ``operators`` (``array``): dictionary of ``binary operator`` => ``fix strategy``
    values that differ from the default strategy; defaults to ``[]``

* **blank_line_after_namespace** [@PSR2, @Symfony, @PhpCsFixer]

  There MUST be one blank line after the namespace declaration.

* **blank_line_after_opening_tag** [@Symfony, @PhpCsFixer]

  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**

  An empty line feed should precede a return statement. DEPRECATED: use
  ``blank_line_before_statement`` instead.

* **blank_line_before_statement** [@Symfony, @PhpCsFixer]

  An empty line feed must precede any configured statement.

  Configuration options:

  - ``statements`` (a subset of ``['break', 'case', 'continue', 'declare',
    'default', 'die', 'do', 'exit', 'for', 'foreach', 'goto', 'if',
    'include', 'include_once', 'require', 'require_once', 'return',
    'switch', 'throw', 'try', 'while', 'yield', 'yield_from']``): list of
    statements which must be preceded by an empty line; defaults to
    ``['break', 'continue', 'declare', 'return', 'throw', 'try']``

* **braces** [@PSR2, @Symfony, @PhpCsFixer]

  The body of each structure MUST be enclosed by braces. Braces should be
  properly placed. Body of braces should be properly indented.

  Configuration options:

  - ``allow_single_line_anonymous_class_with_empty_body`` (``bool``): whether single
    line anonymous class with empty body notation should be allowed;
    defaults to ``false``
  - ``allow_single_line_closure`` (``bool``): whether single line lambda notation
    should be allowed; defaults to ``false``
  - ``position_after_anonymous_constructs`` (``'next'``, ``'same'``): whether the
    opening brace should be placed on "next" or "same" line after anonymous
    constructs (anonymous classes and lambda functions); defaults to ``'same'``
  - ``position_after_control_structures`` (``'next'``, ``'same'``): whether the opening
    brace should be placed on "next" or "same" line after control
    structures; defaults to ``'same'``
  - ``position_after_functions_and_oop_constructs`` (``'next'``, ``'same'``): whether
    the opening brace should be placed on "next" or "same" line after
    classy constructs (non-anonymous classes, interfaces, traits, methods
    and non-lambda functions); defaults to ``'next'``

* **cast_spaces** [@Symfony, @PhpCsFixer]

  A single space or none should be between cast and variable.

  Configuration options:

  - ``space`` (``'none'``, ``'single'``): spacing to apply between cast and variable;
    defaults to ``'single'``

* **class_attributes_separation** [@Symfony, @PhpCsFixer]

  Class, trait and interface elements must be separated with one blank
  line.

  Configuration options:

  - ``elements`` (a subset of ``['const', 'method', 'property']``): list of classy
    elements; 'const', 'method', 'property'; defaults to ``['const',
    'method', 'property']``

* **class_definition** [@PSR2, @Symfony, @PhpCsFixer]

  Whitespace around the keywords of a class, trait or interfaces
  definition should be one space.

  Configuration options:

  - ``multi_line_extends_each_single_line`` (``bool``): whether definitions should
    be multiline; defaults to ``false``; DEPRECATED alias:
    ``multiLineExtendsEachSingleLine``
  - ``single_item_single_line`` (``bool``): whether definitions should be single
    line when including a single item; defaults to ``false``; DEPRECATED alias:
    ``singleItemSingleLine``
  - ``single_line`` (``bool``): whether definitions should be single line; defaults
    to ``false``; DEPRECATED alias: ``singleLine``

* **class_keyword_remove**

  Converts ``::class`` keywords to FQCN strings.

* **combine_consecutive_issets** [@PhpCsFixer]

  Using ``isset($var) &&`` multiple times should be done in one call.

* **combine_consecutive_unsets** [@PhpCsFixer]

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

* **combine_nested_dirname** [@Symfony:risky, @PhpCsFixer:risky, @PHP70Migration:risky, @PHP71Migration:risky, @PHP74Migration:risky]

  Replace multiple nested calls of ``dirname`` by only one call with second
  ``$level`` parameter. Requires PHP >= 7.0.

  *Risky rule: risky when the function ``dirname`` is overridden.*

* **comment_to_phpdoc** [@PhpCsFixer:risky]

  Comments with annotation should be docblock when used on structural
  elements.

  *Risky rule: risky as new docblocks might mean more, e.g. a Doctrine entity might have a new column in database.*

  Configuration options:

  - ``ignored_tags`` (``array``): list of ignored tags; defaults to ``[]``

* **compact_nullable_typehint** [@PhpCsFixer]

  Remove extra spaces in a nullable typehint.

* **concat_space** [@Symfony, @PhpCsFixer]

  Concatenation should be spaced according configuration.

  Configuration options:

  - ``spacing`` (``'none'``, ``'one'``): spacing to apply around concatenation operator;
    defaults to ``'none'``

* **constant_case** [@PSR2, @Symfony, @PhpCsFixer]

  The PHP constants ``true``, ``false``, and ``null`` MUST be written using the
  correct casing.

  Configuration options:

  - ``case`` (``'lower'``, ``'upper'``): whether to use the ``upper`` or ``lower`` case
    syntax; defaults to ``'lower'``

* **date_time_immutable**

  Class ``DateTimeImmutable`` should be used instead of ``DateTime``.

  *Risky rule: risky when the code relies on modifying ``DateTime`` objects or if any of the ``date_create*`` functions are overridden.*

* **declare_equal_normalize** [@Symfony, @PhpCsFixer]

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

  Configuration options:

  - ``space`` (``'none'``, ``'single'``): spacing to apply around the equal sign;
    defaults to ``'none'``

* **declare_strict_types** [@PHP70Migration:risky, @PHP71Migration:risky, @PHP74Migration:risky]

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

  *Risky rule: forcing strict types will stop non strict code from working.*

* **dir_constant** [@Symfony:risky, @PhpCsFixer:risky]

  Replaces ``dirname(__FILE__)`` expression with equivalent ``__DIR__``
  constant.

  *Risky rule: risky when the function ``dirname`` is overridden.*

* **doctrine_annotation_array_assignment** [@DoctrineAnnotation]

  Doctrine annotations must use configured operator for assignment in
  arrays.

  Configuration options:

  - ``ignored_tags`` (``array``): list of tags that must not be treated as Doctrine
    Annotations; defaults to ``['abstract', 'access', 'code', 'deprec',
    'encode', 'exception', 'final', 'ingroup', 'inheritdoc', 'inheritDoc',
    'magic', 'name', 'toc', 'tutorial', 'private', 'static', 'staticvar',
    'staticVar', 'throw', 'api', 'author', 'category', 'copyright',
    'deprecated', 'example', 'filesource', 'global', 'ignore', 'internal',
    'license', 'link', 'method', 'package', 'param', 'property',
    'property-read', 'property-write', 'return', 'see', 'since', 'source',
    'subpackage', 'throws', 'todo', 'TODO', 'usedBy', 'uses', 'var',
    'version', 'after', 'afterClass', 'backupGlobals',
    'backupStaticAttributes', 'before', 'beforeClass',
    'codeCoverageIgnore', 'codeCoverageIgnoreStart',
    'codeCoverageIgnoreEnd', 'covers', 'coversDefaultClass',
    'coversNothing', 'dataProvider', 'depends', 'expectedException',
    'expectedExceptionCode', 'expectedExceptionMessage',
    'expectedExceptionMessageRegExp', 'group', 'large', 'medium',
    'preserveGlobalState', 'requires', 'runTestsInSeparateProcesses',
    'runInSeparateProcess', 'small', 'test', 'testdox', 'ticket', 'uses',
    'SuppressWarnings', 'noinspection', 'package_version', 'enduml',
    'startuml', 'fix', 'FIXME', 'fixme', 'override']``
  - ``operator`` (``':'``, ``'='``): the operator to use; defaults to ``'='``

* **doctrine_annotation_braces** [@DoctrineAnnotation]

  Doctrine annotations without arguments must use the configured syntax.

  Configuration options:

  - ``ignored_tags`` (``array``): list of tags that must not be treated as Doctrine
    Annotations; defaults to ``['abstract', 'access', 'code', 'deprec',
    'encode', 'exception', 'final', 'ingroup', 'inheritdoc', 'inheritDoc',
    'magic', 'name', 'toc', 'tutorial', 'private', 'static', 'staticvar',
    'staticVar', 'throw', 'api', 'author', 'category', 'copyright',
    'deprecated', 'example', 'filesource', 'global', 'ignore', 'internal',
    'license', 'link', 'method', 'package', 'param', 'property',
    'property-read', 'property-write', 'return', 'see', 'since', 'source',
    'subpackage', 'throws', 'todo', 'TODO', 'usedBy', 'uses', 'var',
    'version', 'after', 'afterClass', 'backupGlobals',
    'backupStaticAttributes', 'before', 'beforeClass',
    'codeCoverageIgnore', 'codeCoverageIgnoreStart',
    'codeCoverageIgnoreEnd', 'covers', 'coversDefaultClass',
    'coversNothing', 'dataProvider', 'depends', 'expectedException',
    'expectedExceptionCode', 'expectedExceptionMessage',
    'expectedExceptionMessageRegExp', 'group', 'large', 'medium',
    'preserveGlobalState', 'requires', 'runTestsInSeparateProcesses',
    'runInSeparateProcess', 'small', 'test', 'testdox', 'ticket', 'uses',
    'SuppressWarnings', 'noinspection', 'package_version', 'enduml',
    'startuml', 'fix', 'FIXME', 'fixme', 'override']``
  - ``syntax`` (``'with_braces'``, ``'without_braces'``): whether to add or remove
    braces; defaults to ``'without_braces'``

* **doctrine_annotation_indentation** [@DoctrineAnnotation]

  Doctrine annotations must be indented with four spaces.

  Configuration options:

  - ``ignored_tags`` (``array``): list of tags that must not be treated as Doctrine
    Annotations; defaults to ``['abstract', 'access', 'code', 'deprec',
    'encode', 'exception', 'final', 'ingroup', 'inheritdoc', 'inheritDoc',
    'magic', 'name', 'toc', 'tutorial', 'private', 'static', 'staticvar',
    'staticVar', 'throw', 'api', 'author', 'category', 'copyright',
    'deprecated', 'example', 'filesource', 'global', 'ignore', 'internal',
    'license', 'link', 'method', 'package', 'param', 'property',
    'property-read', 'property-write', 'return', 'see', 'since', 'source',
    'subpackage', 'throws', 'todo', 'TODO', 'usedBy', 'uses', 'var',
    'version', 'after', 'afterClass', 'backupGlobals',
    'backupStaticAttributes', 'before', 'beforeClass',
    'codeCoverageIgnore', 'codeCoverageIgnoreStart',
    'codeCoverageIgnoreEnd', 'covers', 'coversDefaultClass',
    'coversNothing', 'dataProvider', 'depends', 'expectedException',
    'expectedExceptionCode', 'expectedExceptionMessage',
    'expectedExceptionMessageRegExp', 'group', 'large', 'medium',
    'preserveGlobalState', 'requires', 'runTestsInSeparateProcesses',
    'runInSeparateProcess', 'small', 'test', 'testdox', 'ticket', 'uses',
    'SuppressWarnings', 'noinspection', 'package_version', 'enduml',
    'startuml', 'fix', 'FIXME', 'fixme', 'override']``
  - ``indent_mixed_lines`` (``bool``): whether to indent lines that have content
    before closing parenthesis; defaults to ``false``

* **doctrine_annotation_spaces** [@DoctrineAnnotation]

  Fixes spaces in Doctrine annotations.

  Configuration options:

  - ``after_argument_assignments`` (``null``, ``bool``): whether to add, remove or
    ignore spaces after argument assignment operator; defaults to ``false``
  - ``after_array_assignments_colon`` (``null``, ``bool``): whether to add, remove or
    ignore spaces after array assignment ``:`` operator; defaults to ``true``
  - ``after_array_assignments_equals`` (``null``, ``bool``): whether to add, remove or
    ignore spaces after array assignment ``=`` operator; defaults to ``true``
  - ``around_argument_assignments`` (``bool``): whether to fix spaces around
    argument assignment operator; defaults to ``true``. DEPRECATED: use options
    ``before_argument_assignments`` and ``after_argument_assignments`` instead
  - ``around_array_assignments`` (``bool``): whether to fix spaces around array
    assignment operators; defaults to ``true``. DEPRECATED: use options
    ``before_array_assignments_equals``, ``after_array_assignments_equals``,
    ``before_array_assignments_colon`` and ``after_array_assignments_colon``
    instead
  - ``around_commas`` (``bool``): whether to fix spaces around commas; defaults to
    ``true``
  - ``around_parentheses`` (``bool``): whether to fix spaces around parentheses;
    defaults to ``true``
  - ``before_argument_assignments`` (``null``, ``bool``): whether to add, remove or
    ignore spaces before argument assignment operator; defaults to ``false``
  - ``before_array_assignments_colon`` (``null``, ``bool``): whether to add, remove or
    ignore spaces before array ``:`` assignment operator; defaults to ``true``
  - ``before_array_assignments_equals`` (``null``, ``bool``): whether to add, remove or
    ignore spaces before array ``=`` assignment operator; defaults to ``true``
  - ``ignored_tags`` (``array``): list of tags that must not be treated as Doctrine
    Annotations; defaults to ``['abstract', 'access', 'code', 'deprec',
    'encode', 'exception', 'final', 'ingroup', 'inheritdoc', 'inheritDoc',
    'magic', 'name', 'toc', 'tutorial', 'private', 'static', 'staticvar',
    'staticVar', 'throw', 'api', 'author', 'category', 'copyright',
    'deprecated', 'example', 'filesource', 'global', 'ignore', 'internal',
    'license', 'link', 'method', 'package', 'param', 'property',
    'property-read', 'property-write', 'return', 'see', 'since', 'source',
    'subpackage', 'throws', 'todo', 'TODO', 'usedBy', 'uses', 'var',
    'version', 'after', 'afterClass', 'backupGlobals',
    'backupStaticAttributes', 'before', 'beforeClass',
    'codeCoverageIgnore', 'codeCoverageIgnoreStart',
    'codeCoverageIgnoreEnd', 'covers', 'coversDefaultClass',
    'coversNothing', 'dataProvider', 'depends', 'expectedException',
    'expectedExceptionCode', 'expectedExceptionMessage',
    'expectedExceptionMessageRegExp', 'group', 'large', 'medium',
    'preserveGlobalState', 'requires', 'runTestsInSeparateProcesses',
    'runInSeparateProcess', 'small', 'test', 'testdox', 'ticket', 'uses',
    'SuppressWarnings', 'noinspection', 'package_version', 'enduml',
    'startuml', 'fix', 'FIXME', 'fixme', 'override']``

* **echo_tag_syntax** [@Symfony, @PhpCsFixer]

  Replaces short-echo ``<?=`` with long format ``<?php echo``/``<?php print``
  syntax, or vice-versa.

  Configuration options:

  - ``format`` (``'long'``, ``'short'``): the desired language construct; defaults to
    ``'long'``
  - ``long_function`` (``'echo'``, ``'print'``): the function to be used to expand the
    short echo tags; defaults to ``'echo'``
  - ``shorten_simple_statements_only`` (``bool``): render short-echo tags only in
    case of simple code; defaults to ``true``

* **elseif** [@PSR2, @Symfony, @PhpCsFixer]

  The keyword ``elseif`` should be used instead of ``else if`` so that all
  control keywords look like single words.

* **encoding** [@PSR1, @PSR2, @Symfony, @PhpCsFixer]

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

* **ereg_to_preg** [@Symfony:risky, @PhpCsFixer:risky]

  Replace deprecated ``ereg`` regular expression functions with ``preg``.

  *Risky rule: risky if the ``ereg`` function is overridden.*

* **error_suppression** [@Symfony:risky, @PhpCsFixer:risky]

  Error control operator should be added to deprecation notices and/or
  removed from other cases.

  *Risky rule: risky because adding/removing ``@`` might cause changes to code behaviour or if ``trigger_error`` function is overridden.*

  Configuration options:

  - ``mute_deprecation_error`` (``bool``): whether to add ``@`` in deprecation
    notices; defaults to ``true``
  - ``noise_remaining_usages`` (``bool``): whether to remove ``@`` in remaining
    usages; defaults to ``false``
  - ``noise_remaining_usages_exclude`` (``array``): list of global functions to
    exclude from removing ``@``; defaults to ``[]``

* **escape_implicit_backslashes** [@PhpCsFixer]

  Escape implicit backslashes in strings and heredocs to ease the
  understanding of which are special chars interpreted by PHP and which
  not.

  Configuration options:

  - ``double_quoted`` (``bool``): whether to fix double-quoted strings; defaults to
    ``true``
  - ``heredoc_syntax`` (``bool``): whether to fix heredoc syntax; defaults to ``true``
  - ``single_quoted`` (``bool``): whether to fix single-quoted strings; defaults to
    ``false``

* **explicit_indirect_variable** [@PhpCsFixer]

  Add curly braces to indirect variables to make them clear to understand.
  Requires PHP >= 7.0.

* **explicit_string_variable** [@PhpCsFixer]

  Converts implicit variables into explicit ones in double-quoted strings
  or heredoc syntax.

* **final_class**

  All classes must be final, except abstract ones and Doctrine entities.

  *Risky rule: risky when subclassing non-abstract classes.*

* **final_internal_class** [@PhpCsFixer:risky]

  Internal classes should be ``final``.

  *Risky rule: changing classes to ``final`` might cause code execution to break.*

  Configuration options:

  - ``annotation_black_list`` (``array``): class level annotations tags that must be
    omitted to fix the class, even if all of the white list ones are used
    as well. (case insensitive); defaults to ``['@final', '@Entity',
    '@ORM\\Entity', '@ORM\\Mapping\\Entity', '@Mapping\\Entity']``;
    DEPRECATED alias: ``annotation-black-list``
  - ``annotation_white_list`` (``array``): class level annotations tags that must be
    set in order to fix the class. (case insensitive); defaults to
    ``['@internal']``; DEPRECATED alias: ``annotation-white-list``
  - ``consider_absent_docblock_as_internal_class`` (``bool``): should classes
    without any DocBlock be fixed to final?; defaults to ``false``; DEPRECATED
    alias: ``consider-absent-docblock-as-internal-class``

* **final_public_method_for_abstract_class**

  All ``public`` methods of ``abstract`` classes should be ``final``.

  *Risky rule: risky when overriding ``public`` methods of ``abstract`` classes.*

* **final_static_access**

  Converts ``static`` access to ``self`` access in ``final`` classes.
  DEPRECATED: use ``self_static_accessor`` instead.

* **fopen_flag_order** [@Symfony:risky, @PhpCsFixer:risky]

  Order the flags in ``fopen`` calls, ``b`` and ``t`` must be last.

  *Risky rule: risky when the function ``fopen`` is overridden.*

* **fopen_flags** [@Symfony:risky, @PhpCsFixer:risky]

  The flags in ``fopen`` calls must omit ``t``, and ``b`` must be omitted or
  included consistently.

  *Risky rule: risky when the function ``fopen`` is overridden.*

  Configuration options:

  - ``b_mode`` (``bool``): the ``b`` flag must be used (``true``) or omitted (``false``);
    defaults to ``true``

* **full_opening_tag** [@PSR1, @PSR2, @Symfony, @PhpCsFixer]

  PHP code must use the long ``<?php`` tags or short-echo ``<?=`` tags and not
  other tag variations.

* **fully_qualified_strict_types** [@Symfony, @PhpCsFixer]

  Transforms imported FQCN parameters and return types in function
  arguments to short version.

* **function_declaration** [@PSR2, @Symfony, @PhpCsFixer]

  Spaces should be properly placed in a function declaration.

  Configuration options:

  - ``closure_function_spacing`` (``'none'``, ``'one'``): spacing to use before open
    parenthesis for closures; defaults to ``'one'``

* **function_to_constant** [@Symfony:risky, @PhpCsFixer:risky]

  Replace core functions calls returning constants with the constants.

  *Risky rule: risky when any of the configured functions to replace are overridden.*

  Configuration options:

  - ``functions`` (a subset of ``['get_called_class', 'get_class',
    'get_class_this', 'php_sapi_name', 'phpversion', 'pi']``): list of
    function names to fix; defaults to ``['get_class', 'php_sapi_name',
    'phpversion', 'pi']``

* **function_typehint_space** [@Symfony, @PhpCsFixer]

  Ensure single space between function's argument and its typehint.

* **general_phpdoc_annotation_remove**

  Configured annotations should be omitted from PHPDoc.

  Configuration options:

  - ``annotations`` (``array``): list of annotations to remove, e.g. ``["author"]``;
    defaults to ``[]``

* **global_namespace_import**

  Imports or fully qualifies global classes/functions/constants.

  Configuration options:

  - ``import_classes`` (``false``, ``null``, ``true``): whether to import, not import or
    ignore global classes; defaults to ``true``
  - ``import_constants`` (``false``, ``null``, ``true``): whether to import, not import or
    ignore global constants; defaults to ``null``
  - ``import_functions`` (``false``, ``null``, ``true``): whether to import, not import or
    ignore global functions; defaults to ``null``

* **hash_to_slash_comment**

  Single line comments should use double slashes ``//`` and not hash ``#``.
  DEPRECATED: use ``single_line_comment_style`` instead.

* **header_comment**

  Add, replace or remove header comment.

  Configuration options:

  - ``comment_type`` (``'comment'``, ``'PHPDoc'``): comment syntax type; defaults to
    ``'comment'``; DEPRECATED alias: ``commentType``
  - ``header`` (``string``): proper header content; required
  - ``location`` (``'after_declare_strict'``, ``'after_open'``): the location of the
    inserted header; defaults to ``'after_declare_strict'``
  - ``separate`` (``'both'``, ``'bottom'``, ``'none'``, ``'top'``): whether the header should be
    separated from the file content with a new line; defaults to ``'both'``

* **heredoc_indentation** [@PHP73Migration, @PHP74Migration]

  Heredoc/nowdoc content must be properly indented. Requires PHP >= 7.3.

* **heredoc_to_nowdoc** [@PhpCsFixer]

  Convert ``heredoc`` to ``nowdoc`` where possible.

* **implode_call** [@Symfony:risky, @PhpCsFixer:risky, @PHP74Migration:risky]

  Function ``implode`` must be called with 2 arguments in the documented
  order.

  *Risky rule: risky when the function ``implode`` is overridden.*

* **include** [@Symfony, @PhpCsFixer]

  Include/Require and file path should be divided with a single space.
  File path should not be placed under brackets.

* **increment_style** [@Symfony, @PhpCsFixer]

  Pre- or post-increment and decrement operators should be used if
  possible.

  Configuration options:

  - ``style`` (``'post'``, ``'pre'``): whether to use pre- or post-increment and
    decrement operators; defaults to ``'pre'``

* **indentation_type** [@PSR2, @Symfony, @PhpCsFixer]

  Code MUST use configured indentation type.

* **is_null** [@Symfony:risky, @PhpCsFixer:risky]

  Replaces ``is_null($var)`` expression with ``null === $var``.

  *Risky rule: risky when the function ``is_null`` is overridden.*

  Configuration options:

  - ``use_yoda_style`` (``bool``): whether Yoda style conditions should be used;
    defaults to ``true``. DEPRECATED: use ``yoda_style`` fixer instead

* **lambda_not_used_import** [@Symfony, @PhpCsFixer]

  Lambda must not import variables it doesn't use.

* **line_ending** [@PSR2, @Symfony, @PhpCsFixer]

  All PHP files must use same line ending.

* **linebreak_after_opening_tag** [@Symfony, @PhpCsFixer]

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

* **list_syntax**

  List (``array`` destructuring) assignment should be declared using the
  configured syntax. Requires PHP >= 7.1.

  Configuration options:

  - ``syntax`` (``'long'``, ``'short'``): whether to use the ``long`` or ``short`` ``list``
    syntax; defaults to ``'long'``

* **logical_operators** [@Symfony:risky, @PhpCsFixer:risky]

  Use ``&&`` and ``||`` logical operators instead of ``and`` and ``or``.

  *Risky rule: risky, because you must double-check if using and/or with lower precedence was intentional.*

* **lowercase_cast** [@Symfony, @PhpCsFixer]

  Cast should be written in lower case.

* **lowercase_constants**

  The PHP constants ``true``, ``false``, and ``null`` MUST be in lower case.
  DEPRECATED: use ``constant_case`` instead.

* **lowercase_keywords** [@PSR2, @Symfony, @PhpCsFixer]

  PHP keywords MUST be in lower case.

* **lowercase_static_reference** [@Symfony, @PhpCsFixer]

  Class static references ``self``, ``static`` and ``parent`` MUST be in lower
  case.

* **magic_constant_casing** [@Symfony, @PhpCsFixer]

  Magic constants should be referred to using the correct casing.

* **magic_method_casing** [@Symfony, @PhpCsFixer]

  Magic method definitions and calls must be using the correct casing.

* **mb_str_functions**

  Replace non multibyte-safe functions with corresponding mb function.

  *Risky rule: risky when any of the functions are overridden.*

* **method_argument_space** [@PSR2, @Symfony, @PhpCsFixer]

  In method arguments and method call, there MUST NOT be a space before
  each comma and there MUST be one space after each comma. Argument lists
  MAY be split across multiple lines, where each subsequent line is
  indented once. When doing so, the first item in the list MUST be on the
  next line, and there MUST be only one argument per line.

  Configuration options:

  - ``after_heredoc`` (``bool``): whether the whitespace between heredoc end and
    comma should be removed; defaults to ``false``
  - ``ensure_fully_multiline`` (``bool``): ensure every argument of a multiline
    argument list is on its own line; defaults to ``false``. DEPRECATED: use
    option ``on_multiline`` instead
  - ``keep_multiple_spaces_after_comma`` (``bool``): whether keep multiple spaces
    after comma; defaults to ``false``
  - ``on_multiline`` (``'ensure_fully_multiline'``, ``'ensure_single_line'``, ``'ignore'``):
    defines how to handle function arguments lists that contain newlines;
    defaults to ``'ignore'``

* **method_chaining_indentation** [@PhpCsFixer]

  Method chaining MUST be properly indented. Method chaining with
  different levels of indentation is not supported.

* **method_separation**

  Methods must be separated with one blank line. DEPRECATED: use
  ``class_attributes_separation`` instead.

* **modernize_types_casting** [@Symfony:risky, @PhpCsFixer:risky]

  Replaces ``intval``, ``floatval``, ``doubleval``, ``strval`` and ``boolval``
  function calls with according type casting operator.

  *Risky rule: risky if any of the functions ``intval``, ``floatval``, ``doubleval``, ``strval`` or ``boolval`` are overridden.*

* **multiline_comment_opening_closing** [@PhpCsFixer]

  DocBlocks must start with two asterisks, multiline comments must start
  with a single asterisk, after the opening slash. Both must end with a
  single asterisk before the closing slash.

* **multiline_whitespace_before_semicolons** [@PhpCsFixer]

  Forbid multi-line whitespace before the closing semicolon or move the
  semicolon to the new line for chained calls.

  Configuration options:

  - ``strategy`` (``'new_line_for_chained_calls'``, ``'no_multi_line'``): forbid
    multi-line whitespace or move the semicolon to the new line for chained
    calls; defaults to ``'no_multi_line'``

* **native_constant_invocation** [@Symfony:risky, @PhpCsFixer:risky]

  Add leading ``\`` before constant invocation of internal constant to speed
  up resolving. Constant name match is case-sensitive, except for ``null``,
  ``false`` and ``true``.

  *Risky rule: risky when any of the constants are namespaced or overridden.*

  Configuration options:

  - ``exclude`` (``array``): list of constants to ignore; defaults to ``['null',
    'false', 'true']``
  - ``fix_built_in`` (``bool``): whether to fix constants returned by
    ``get_defined_constants``. User constants are not accounted in this list
    and must be specified in the include one; defaults to ``true``
  - ``include`` (``array``): list of additional constants to fix; defaults to ``[]``
  - ``scope`` (``'all'``, ``'namespaced'``): only fix constant invocations that are made
    within a namespace or fix all; defaults to ``'all'``
  - ``strict`` (``bool``): whether leading ``\`` of constant invocation not meant to
    have it should be removed; defaults to ``false``

* **native_function_casing** [@Symfony, @PhpCsFixer]

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

* **native_function_invocation** [@Symfony:risky, @PhpCsFixer:risky]

  Add leading ``\`` before function invocation to speed up resolving.

  *Risky rule: risky when any of the functions are overridden.*

  Configuration options:

  - ``exclude`` (``array``): list of functions to ignore; defaults to ``[]``
  - ``include`` (``array``): list of function names or sets to fix. Defined sets are
    ``@internal`` (all native functions), ``@all`` (all global functions) and
    ``@compiler_optimized`` (functions that are specially optimized by Zend);
    defaults to ``['@internal']``
  - ``scope`` (``'all'``, ``'namespaced'``): only fix function calls that are made
    within a namespace or fix all; defaults to ``'all'``
  - ``strict`` (``bool``): whether leading ``\`` of function call not meant to have it
    should be removed; defaults to ``false``

* **native_function_type_declaration_casing** [@Symfony, @PhpCsFixer]

  Native type hints for functions should use the correct case.

* **new_with_braces** [@Symfony, @PhpCsFixer]

  All instances created with new keyword must be followed by braces.

* **no_alias_functions** [@Symfony:risky, @PhpCsFixer:risky, @PHP74Migration:risky]

  Master functions shall be used instead of aliases.

  *Risky rule: risky when any of the alias functions are overridden.*

  Configuration options:

  - ``sets`` (a subset of ``['@internal', '@IMAP', '@mbreg', '@all']``): list of
    sets to fix. Defined sets are ``@internal`` (native functions), ``@IMAP``
    (IMAP functions), ``@mbreg`` (from ``ext-mbstring``) ``@all`` (all listed
    sets); defaults to ``['@internal', '@IMAP']``

* **no_alias_language_construct_call** [@Symfony, @PhpCsFixer]

  Master language constructs shall be used instead of aliases.

* **no_alternative_syntax** [@Symfony, @PhpCsFixer]

  Replace control structure alternative syntax to use braces.

* **no_binary_string** [@Symfony, @PhpCsFixer]

  There should not be a binary flag before strings.

* **no_blank_lines_after_class_opening** [@Symfony, @PhpCsFixer]

  There should be no empty lines after class opening brace.

* **no_blank_lines_after_phpdoc** [@Symfony, @PhpCsFixer]

  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_break_comment** [@PSR2, @Symfony, @PhpCsFixer]

  There must be a comment when fall-through is intentional in a non-empty
  case body.

  Configuration options:

  - ``comment_text`` (``string``): the text to use in the added comment and to
    detect it; defaults to ``'no break'``

* **no_closing_tag** [@PSR2, @Symfony, @PhpCsFixer]

  The closing ``?>`` tag MUST be omitted from files containing only PHP.

* **no_empty_comment** [@Symfony, @PhpCsFixer]

  There should not be any empty comments.

* **no_empty_phpdoc** [@Symfony, @PhpCsFixer]

  There should not be empty PHPDoc blocks.

* **no_empty_statement** [@Symfony, @PhpCsFixer]

  Remove useless semicolon statements.

* **no_extra_blank_lines** [@Symfony, @PhpCsFixer]

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

  Configuration options:

  - ``tokens`` (a subset of ``['break', 'case', 'continue', 'curly_brace_block',
    'default', 'extra', 'parenthesis_brace_block', 'return',
    'square_brace_block', 'switch', 'throw', 'use', 'useTrait',
    'use_trait']``): list of tokens to fix; defaults to ``['extra']``

* **no_extra_consecutive_blank_lines**

  Removes extra blank lines and/or blank lines following configuration.
  DEPRECATED: use ``no_extra_blank_lines`` instead.

  Configuration options:

  - ``tokens`` (a subset of ``['break', 'case', 'continue', 'curly_brace_block',
    'default', 'extra', 'parenthesis_brace_block', 'return',
    'square_brace_block', 'switch', 'throw', 'use', 'useTrait',
    'use_trait']``): list of tokens to fix; defaults to ``['extra']``

* **no_homoglyph_names** [@Symfony:risky, @PhpCsFixer:risky]

  Replace accidental usage of homoglyphs (non ascii characters) in names.

  *Risky rule: renames classes and cannot rename the files. You might have string references to renamed code (``$$name``).*

* **no_leading_import_slash** [@Symfony, @PhpCsFixer]

  Remove leading slashes in ``use`` clauses.

* **no_leading_namespace_whitespace** [@Symfony, @PhpCsFixer]

  The namespace declaration line shouldn't contain leading whitespace.

* **no_mixed_echo_print** [@Symfony, @PhpCsFixer]

  Either language construct ``print`` or ``echo`` should be used.

  Configuration options:

  - ``use`` (``'echo'``, ``'print'``): the desired language construct; defaults to
    ``'echo'``

* **no_multiline_whitespace_around_double_arrow** [@Symfony, @PhpCsFixer]

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

* **no_multiline_whitespace_before_semicolons**

  Multi-line whitespace before closing semicolon are prohibited.
  DEPRECATED: use ``multiline_whitespace_before_semicolons`` instead.

* **no_null_property_initialization** [@PhpCsFixer]

  Properties MUST not be explicitly initialized with ``null`` except when
  they have a type declaration (PHP 7.4).

* **no_php4_constructor** [@Symfony:risky, @PhpCsFixer:risky]

  Convert PHP4-style constructors to ``__construct``.

  *Risky rule: risky when old style constructor being fixed is overridden or overrides parent one.*

* **no_short_bool_cast** [@Symfony, @PhpCsFixer]

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

* **no_short_echo_tag**

  Replaces short-echo ``<?=`` with long format ``<?php echo`` syntax.
  DEPRECATED: use ``echo_tag_syntax`` instead.

* **no_singleline_whitespace_before_semicolons** [@Symfony, @PhpCsFixer]

  Single-line whitespace before closing semicolon are prohibited.

* **no_spaces_after_function_name** [@PSR2, @Symfony, @PhpCsFixer]

  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, @PhpCsFixer]

  There MUST NOT be spaces around offset braces.

  Configuration options:

  - ``positions`` (a subset of ``['inside', 'outside']``): whether spacing should be
    fixed inside and/or outside the offset braces; defaults to ``['inside',
    'outside']``

* **no_spaces_inside_parenthesis** [@PSR2, @Symfony, @PhpCsFixer]

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

* **no_superfluous_elseif** [@PhpCsFixer]

  Replaces superfluous ``elseif`` with ``if``.

* **no_superfluous_phpdoc_tags** [@Symfony, @PhpCsFixer]

  Removes ``@param``, ``@return`` and ``@var`` tags that don't provide any
  useful information.

  Configuration options:

  - ``allow_mixed`` (``bool``): whether type ``mixed`` without description is allowed
    (``true``) or considered superfluous (``false``); defaults to ``false``
  - ``allow_unused_params`` (``bool``): whether ``param`` annotation without actual
    signature is allowed (``true``) or considered superfluous (``false``);
    defaults to ``false``
  - ``remove_inheritdoc`` (``bool``): remove ``@inheritDoc`` tags; defaults to ``false``

* **no_trailing_comma_in_list_call** [@Symfony, @PhpCsFixer]

  Remove trailing commas in list function calls.

* **no_trailing_comma_in_singleline_array** [@Symfony, @PhpCsFixer]

  PHP single-line arrays should not have trailing comma.

* **no_trailing_whitespace** [@PSR2, @Symfony, @PhpCsFixer]

  Remove trailing whitespace at the end of non-blank lines.

* **no_trailing_whitespace_in_comment** [@PSR2, @Symfony, @PhpCsFixer]

  There MUST be no trailing spaces inside comment or PHPDoc.

* **no_trailing_whitespace_in_string** [@PhpCsFixer:risky]

  There must be no trailing whitespace in strings.

  *Risky rule: changing the whitespaces in strings might affect string comparisons and outputs.*

* **no_unneeded_control_parentheses** [@Symfony, @PhpCsFixer]

  Removes unneeded parentheses around control statements.

  Configuration options:

  - ``statements`` (``array``): list of control statements to fix; defaults to
    ``['break', 'clone', 'continue', 'echo_print', 'return', 'switch_case',
    'yield']``

* **no_unneeded_curly_braces** [@Symfony, @PhpCsFixer]

  Removes unneeded curly braces that are superfluous and aren't part of a
  control structure's body.

  Configuration options:

  - ``namespaces`` (``bool``): remove unneeded curly braces from bracketed
    namespaces; defaults to ``false``

* **no_unneeded_final_method** [@Symfony:risky, @PhpCsFixer:risky]

  A ``final`` class must not have ``final`` methods and ``private`` methods must
  not be ``final``.

  *Risky rule: risky when child class overrides a ``private`` method.*

  Configuration options:

  - ``private_methods`` (``bool``): private methods of non-``final`` classes must not
    be declared ``final``; defaults to ``true``

* **no_unreachable_default_argument_value** [@PhpCsFixer:risky]

  In function arguments there must not be arguments with default values
  before non-default ones.

  *Risky rule: modifies the signature of functions; therefore risky when using systems (such as some Symfony components) that rely on those (for example through reflection).*

* **no_unset_cast** [@Symfony, @PhpCsFixer]

  Variables must be set ``null`` instead of using ``(unset)`` casting.

* **no_unset_on_property** [@PhpCsFixer:risky]

  Properties should be set to ``null`` instead of using ``unset``.

  *Risky rule: changing variables to ``null`` instead of unsetting them will mean they still show up when looping over class variables. With PHP 7.4, this rule might introduce ``null`` assignments to property whose type declaration does not allow it.*

* **no_unused_imports** [@Symfony, @PhpCsFixer]

  Unused ``use`` statements must be removed.

* **no_useless_else** [@PhpCsFixer]

  There should not be useless ``else`` cases.

* **no_useless_return** [@PhpCsFixer]

  There should not be an empty ``return`` statement at the end of a
  function.

* **no_whitespace_before_comma_in_array** [@Symfony, @PhpCsFixer]

  In array declaration, there MUST NOT be a whitespace before each comma.

  Configuration options:

  - ``after_heredoc`` (``bool``): whether the whitespace between heredoc end and
    comma should be removed; defaults to ``false``

* **no_whitespace_in_blank_line** [@Symfony, @PhpCsFixer]

  Remove trailing whitespace at the end of blank lines.

* **non_printable_character** [@Symfony:risky, @PhpCsFixer:risky, @PHP70Migration:risky, @PHP71Migration:risky, @PHP74Migration:risky]

  Remove Zero-width space (ZWSP), Non-breaking space (NBSP) and other
  invisible unicode symbols.

  *Risky rule: risky when strings contain intended invisible characters.*

  Configuration options:

  - ``use_escape_sequences_in_strings`` (``bool``): whether characters should be
    replaced with escape sequences in strings; defaults to ``false``

* **normalize_index_brace** [@Symfony, @PhpCsFixer, @PHP74Migration]

  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.

* **nullable_type_declaration_for_default_null_value**

  Adds or removes ``?`` before type declarations for parameters with a
  default ``null`` value.

  Configuration options:

  - ``use_nullable_type_declaration`` (``bool``): whether to add or remove ``?``
    before type declarations for parameters with a default ``null`` value;
    defaults to ``true``

* **object_operator_without_whitespace** [@Symfony, @PhpCsFixer]

  There should not be space before or after object ``T_OBJECT_OPERATOR``
  ``->``.

* **ordered_class_elements** [@PhpCsFixer]

  Orders the elements of classes/interfaces/traits.

  Configuration options:

  - ``order`` (a subset of ``['use_trait', 'public', 'protected', 'private',
    'constant', 'constant_public', 'constant_protected',
    'constant_private', 'property', 'property_static', 'property_public',
    'property_protected', 'property_private', 'property_public_static',
    'property_protected_static', 'property_private_static', 'method',
    'method_static', 'method_public', 'method_protected', 'method_private',
    'method_public_static', 'method_protected_static',
    'method_private_static', 'construct', 'destruct', 'magic', 'phpunit']``):
    list of strings defining order of elements; defaults to ``['use_trait',
    'constant_public', 'constant_protected', 'constant_private',
    'property_public', 'property_protected', 'property_private',
    'construct', 'destruct', 'magic', 'phpunit', 'method_public',
    'method_protected', 'method_private']``
  - ``sort_algorithm`` (``'alpha'``, ``'none'``): how multiple occurrences of same type
    statements should be sorted; defaults to ``'none'``; DEPRECATED alias:
    ``sortAlgorithm``

* **ordered_imports** [@Symfony, @PhpCsFixer]

  Ordering ``use`` statements.

  Configuration options:

  - ``imports_order`` (``array``, ``null``): defines the order of import types; defaults
    to ``null``; DEPRECATED alias: ``importsOrder``
  - ``sort_algorithm`` (``'alpha'``, ``'length'``, ``'none'``): whether the statements
    should be sorted alphabetically or by length, or not sorted; defaults
    to ``'alpha'``; DEPRECATED alias: ``sortAlgorithm``

* **ordered_interfaces**

  Orders the interfaces in an ``implements`` or ``interface extends`` clause.

  *Risky rule: risky for ``implements`` when specifying both an interface and its parent interface, because PHP doesn't break on ``parent, child`` but does on ``child, parent``.*

  Configuration options:

  - ``direction`` (``'ascend'``, ``'descend'``): which direction the interfaces should
    be ordered; defaults to ``'ascend'``
  - ``order`` (``'alpha'``, ``'length'``): how the interfaces should be ordered;
    defaults to ``'alpha'``

* **ordered_traits** [@Symfony, @PhpCsFixer]

  Trait ``use`` statements must be sorted alphabetically.

* **php_unit_construct** [@Symfony:risky, @PhpCsFixer:risky]

  PHPUnit assertion method calls like ``->assertSame(true, $foo)`` should be
  written with dedicated method like ``->assertTrue($foo)``.

  *Risky rule: fixer could be risky if one is overriding PHPUnit's native methods.*

  Configuration options:

  - ``assertions`` (a subset of ``['assertSame', 'assertEquals',
    'assertNotEquals', 'assertNotSame']``): list of assertion methods to fix;
    defaults to ``['assertEquals', 'assertSame', 'assertNotEquals',
    'assertNotSame']``

* **php_unit_dedicate_assert** [@PHPUnit30Migration:risky, @PHPUnit32Migration:risky, @PHPUnit35Migration:risky, @PHPUnit43Migration:risky, @PHPUnit48Migration:risky, @PHPUnit50Migration:risky, @PHPUnit52Migration:risky, @PHPUnit54Migration:risky, @PHPUnit55Migration:risky, @PHPUnit56Migration:risky, @PHPUnit57Migration:risky, @PHPUnit60Migration:risky, @PHPUnit75Migration:risky]

  PHPUnit assertions like ``assertInternalType``, ``assertFileExists``, should
  be used over ``assertTrue``.

  *Risky rule: fixer could be risky if one is overriding PHPUnit's native methods.*

  Configuration options:

  - ``functions`` (a subset of ``['array_key_exists', 'empty', 'file_exists',
    'is_array', 'is_bool', 'is_callable', 'is_double', 'is_float',
    'is_infinite', 'is_int', 'is_integer', 'is_long', 'is_nan', 'is_null',
    'is_numeric', 'is_object', 'is_real', 'is_resource', 'is_scalar',
    'is_string']``, ``null``): list of assertions to fix (overrides ``target``);
    defaults to ``null``. DEPRECATED: use option ``target`` instead
  - ``target`` (``'3.0'``, ``'3.5'``, ``'5.0'``, ``'5.6'``, ``'newest'``): target version of
    PHPUnit; defaults to ``'5.0'``

* **php_unit_dedicate_assert_internal_type** [@PHPUnit75Migration:risky]

  PHPUnit assertions like ``assertIsArray`` should be used over
  ``assertInternalType``.

  *Risky rule: risky when PHPUnit methods are overridden or when project has PHPUnit incompatibilities.*

  Configuration options:

  - ``target`` (``'7.5'``, ``'newest'``): target version of PHPUnit; defaults to
    ``'newest'``

* **php_unit_expectation** [@PHPUnit52Migration:risky, @PHPUnit54Migration:risky, @PHPUnit55Migration:risky, @PHPUnit56Migration:risky, @PHPUnit57Migration:risky, @PHPUnit60Migration:risky, @PHPUnit75Migration:risky]

  Usages of ``->setExpectedException*`` methods MUST be replaced by
  ``->expectException*`` methods.

  *Risky rule: risky when PHPUnit classes are overridden or not accessible, or when project has PHPUnit incompatibilities.*

  Configuration options:

  - ``target`` (``'5.2'``, ``'5.6'``, ``'newest'``): target version of PHPUnit; defaults to
    ``'newest'``

* **php_unit_fqcn_annotation** [@Symfony, @PhpCsFixer]

  PHPUnit annotations should be a FQCNs including a root namespace.

* **php_unit_internal_class** [@PhpCsFixer]

  All PHPUnit test classes should be marked as internal.

  Configuration options:

  - ``types`` (a subset of ``['normal', 'final', 'abstract']``): what types of
    classes to mark as internal; defaults to ``['normal', 'final']``

* **php_unit_method_casing** [@Symfony, @PhpCsFixer]

  Enforce camel (or snake) case for PHPUnit test methods, following
  configuration.

  Configuration options:

  - ``case`` (``'camel_case'``, ``'snake_case'``): apply camel or snake case to test
    methods; defaults to ``'camel_case'``

* **php_unit_mock** [@PHPUnit54Migration:risky, @PHPUnit55Migration:risky, @PHPUnit56Migration:risky, @PHPUnit57Migration:risky, @PHPUnit60Migration:risky, @PHPUnit75Migration:risky]

  Usages of ``->getMock`` and
  ``->getMockWithoutInvokingTheOriginalConstructor`` methods MUST be
  replaced by ``->createMock`` or ``->createPartialMock`` methods.

  *Risky rule: risky when PHPUnit classes are overridden or not accessible, or when project has PHPUnit incompatibilities.*

  Configuration options:

  - ``target`` (``'5.4'``, ``'5.5'``, ``'newest'``): target version of PHPUnit; defaults to
    ``'newest'``

* **php_unit_mock_short_will_return** [@Symfony:risky, @PhpCsFixer:risky]

  Usage of PHPUnit's mock e.g. ``->will($this->returnValue(..))`` must be
  replaced by its shorter equivalent such as ``->willReturn(...)``.

  *Risky rule: risky when PHPUnit classes are overridden or not accessible, or when project has PHPUnit incompatibilities.*

* **php_unit_namespaced** [@PHPUnit48Migration:risky, @PHPUnit50Migration:risky, @PHPUnit52Migration:risky, @PHPUnit54Migration:risky, @PHPUnit55Migration:risky, @PHPUnit56Migration:risky, @PHPUnit57Migration:risky, @PHPUnit60Migration:risky, @PHPUnit75Migration:risky]

  PHPUnit classes MUST be used in namespaced version, e.g.
  ``\PHPUnit\Framework\TestCase`` instead of ``\PHPUnit_Framework_TestCase``.

  *Risky rule: risky when PHPUnit classes are overridden or not accessible, or when project has PHPUnit incompatibilities.*

  Configuration options:

  - ``target`` (``'4.8'``, ``'5.7'``, ``'6.0'``, ``'newest'``): target version of PHPUnit;
    defaults to ``'newest'``

* **php_unit_no_expectation_annotation** [@PHPUnit32Migration:risky, @PHPUnit35Migration:risky, @PHPUnit43Migration:risky, @PHPUnit48Migration:risky, @PHPUnit50Migration:risky, @PHPUnit52Migration:risky, @PHPUnit54Migration:risky, @PHPUnit55Migration:risky, @PHPUnit56Migration:risky, @PHPUnit57Migration:risky, @PHPUnit60Migration:risky, @PHPUnit75Migration:risky]

  Usages of ``@expectedException*`` annotations MUST be replaced by
  ``->setExpectedException*`` methods.

  *Risky rule: risky when PHPUnit classes are overridden or not accessible, or when project has PHPUnit incompatibilities.*

  Configuration options:

  - ``target`` (``'3.2'``, ``'4.3'``, ``'newest'``): target version of PHPUnit; defaults to
    ``'newest'``
  - ``use_class_const`` (``bool``): use ::class notation; defaults to ``true``

* **php_unit_ordered_covers**

  Order ``@covers`` annotation of PHPUnit tests. DEPRECATED: use
  ``phpdoc_order_by_value`` instead.

* **php_unit_set_up_tear_down_visibility** [@Symfony:risky, @PhpCsFixer:risky]

  Changes the visibility of the ``setUp()`` and ``tearDown()`` functions of
  PHPUnit to ``protected``, to match the PHPUnit TestCase.

  *Risky rule: this fixer may change functions named ``setUp()`` or ``tearDown()`` outside of PHPUnit tests, when a class is wrongly seen as a PHPUnit test.*

* **php_unit_size_class**

  All PHPUnit test cases should have ``@small``, ``@medium`` or ``@large``
  annotation to enable run time limits.

  Configuration options:

  - ``group`` (``'large'``, ``'medium'``, ``'small'``): define a specific group to be used
    in case no group is already in use; defaults to ``'small'``

* **php_unit_strict** [@PhpCsFixer:risky]

  PHPUnit methods like ``assertSame`` should be used instead of
  ``assertEquals``.

  *Risky rule: risky when any of the functions are overridden or when testing object equality.*

  Configuration options:

  - ``assertions`` (a subset of ``['assertAttributeEquals',
    'assertAttributeNotEquals', 'assertEquals', 'assertNotEquals']``): list
    of assertion methods to fix; defaults to ``['assertAttributeEquals',
    'assertAttributeNotEquals', 'assertEquals', 'assertNotEquals']``

* **php_unit_test_annotation** [@Symfony:risky, @PhpCsFixer:risky]

  Adds or removes @test annotations from tests, following configuration.

  *Risky rule: this fixer may change the name of your tests, and could cause incompatibility with abstract classes or interfaces.*

  Configuration options:

  - ``case`` (``'camel'``, ``'snake'``): whether to camel or snake case when adding the
    test prefix; defaults to ``'camel'``. DEPRECATED: use
    ``php_unit_method_casing`` fixer instead
  - ``style`` (``'annotation'``, ``'prefix'``): whether to use the @test annotation or
    not; defaults to ``'prefix'``

* **php_unit_test_case_static_method_calls** [@PhpCsFixer:risky]

  Calls to ``PHPUnit\Framework\TestCase`` static methods must all be of the
  same type, either ``$this->``, ``self::`` or ``static::``.

  *Risky rule: risky when PHPUnit methods are overridden or not accessible, or when project has PHPUnit incompatibilities.*

  Configuration options:

  - ``call_type`` (``'self'``, ``'static'``, ``'this'``): the call type to use for referring
    to PHPUnit methods; defaults to ``'static'``
  - ``methods`` (``array``): dictionary of ``method`` => ``call_type`` values that
    differ from the default strategy; defaults to ``[]``

* **php_unit_test_class_requires_covers** [@PhpCsFixer]

  Adds a default ``@coversNothing`` annotation to PHPUnit test classes that
  have no ``@covers*`` annotation.

* **phpdoc_add_missing_param_annotation** [@PhpCsFixer]

  PHPDoc should contain ``@param`` for all params.

  Configuration options:

  - ``only_untyped`` (``bool``): whether to add missing ``@param`` annotations for
    untyped parameters only; defaults to ``true``

* **phpdoc_align** [@Symfony, @PhpCsFixer]

  All items of the given phpdoc tags must be either left-aligned or (by
  default) aligned vertically.

  Configuration options:

  - ``align`` (``'left'``, ``'vertical'``): align comments; defaults to ``'vertical'``
  - ``tags`` (a subset of ``['param', 'property', 'property-read',
    'property-write', 'return', 'throws', 'type', 'var', 'method']``): the
    tags that should be aligned; defaults to ``['param', 'return', 'throws',
    'type', 'var']``

* **phpdoc_annotation_without_dot** [@Symfony, @PhpCsFixer]

  PHPDoc annotation descriptions should not be a sentence.

* **phpdoc_indent** [@Symfony, @PhpCsFixer]

  Docblocks should have the same indentation as the documented subject.

* **phpdoc_inline_tag** [@Symfony, @PhpCsFixer]

  Fix PHPDoc inline tags, make ``@inheritdoc`` always inline.

* **phpdoc_line_span**

  Changes doc blocks from single to multi line, or reversed. Works for
  class constants, properties and methods only.

  Configuration options:

  - ``const`` (``'multi'``, ``'single'``): whether const blocks should be single or
    multi line; defaults to ``'multi'``
  - ``method`` (``'multi'``, ``'single'``): whether method doc blocks should be single
    or multi line; defaults to ``'multi'``
  - ``property`` (``'multi'``, ``'single'``): whether property doc blocks should be
    single or multi line; defaults to ``'multi'``

* **phpdoc_no_access** [@Symfony, @PhpCsFixer]

  ``@access`` annotations should be omitted from PHPDoc.

* **phpdoc_no_alias_tag** [@Symfony, @PhpCsFixer]

  No alias PHPDoc tags should be used.

  Configuration options:

  - ``replacements`` (``array``): mapping between replaced annotations with new
    ones; defaults to ``['property-read' => 'property', 'property-write' =>
    'property', 'type' => 'var', 'link' => 'see']``

* **phpdoc_no_empty_return** [@PhpCsFixer]

  ``@return void`` and ``@return null`` annotations should be omitted from
  PHPDoc.

* **phpdoc_no_package** [@Symfony, @PhpCsFixer]

  ``@package`` and ``@subpackage`` annotations should be omitted from PHPDoc.

* **phpdoc_no_useless_inheritdoc** [@Symfony, @PhpCsFixer]

  Classy that does not inherit must not have ``@inheritdoc`` tags.

* **phpdoc_order** [@PhpCsFixer]

  Annotations in PHPDoc should be ordered so that ``@param`` annotations
  come first, then ``@throws`` annotations, then ``@return`` annotations.

* **phpdoc_order_by_value** [@PhpCsFixer]

  Order phpdoc tags by value.

  Configuration options:

  - ``annotations`` (a subset of ``['author', 'covers', 'coversNothing',
    'dataProvider', 'depends', 'group', 'internal', 'requires', 'uses']``):
    list of annotations to order, e.g. ``["covers"]``; defaults to ``['covers']``

* **phpdoc_return_self_reference** [@Symfony, @PhpCsFixer]

  The type of ``@return`` annotations of methods returning a reference to
  itself must the configured one.

  Configuration options:

  - ``replacements`` (``array``): mapping between replaced return types with new
    ones; defaults to ``['this' => '$this', '@this' => '$this', '$self' =>
    'self', '@self' => 'self', '$static' => 'static', '@static' =>
    'static']``

* **phpdoc_scalar** [@Symfony, @PhpCsFixer]

  Scalar types should always be written in the same form. ``int`` not
  ``integer``, ``bool`` not ``boolean``, ``float`` not ``real`` or ``double``.

  Configuration options:

  - ``types`` (a subset of ``['boolean', 'callback', 'double', 'integer', 'real',
    'str']``): a map of types to fix; defaults to ``['boolean', 'double',
    'integer', 'real', 'str']``

* **phpdoc_separation** [@Symfony, @PhpCsFixer]

  Annotations in PHPDoc 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, @PhpCsFixer]

  Single line ``@var`` PHPDoc should have proper spacing.

* **phpdoc_summary** [@Symfony, @PhpCsFixer]

  PHPDoc summary should end in either a full stop, exclamation mark, or
  question mark.

* **phpdoc_to_comment** [@Symfony, @PhpCsFixer]

  Docblocks should only be used on structural elements.

* **phpdoc_to_param_type**

  EXPERIMENTAL: Takes ``@param`` annotations of non-mixed types and adjusts
  accordingly the function signature. Requires PHP >= 7.0.

  *Risky rule: [1] This rule is EXPERIMENTAL and is not covered with backward compatibility promise. [2] ``@param`` annotation is mandatory for the fixer to make changes, signatures of methods without it (no docblock, inheritdocs) will not be fixed. [3] Manual actions are required if inherited signatures are not properly documented.*

  Configuration options:

  - ``scalar_types`` (``bool``): fix also scalar types; may have unexpected
    behaviour due to PHP bad type coercion system; defaults to ``true``

* **phpdoc_to_return_type**

  EXPERIMENTAL: Takes ``@return`` annotation of non-mixed types and adjusts
  accordingly the function signature. Requires PHP >= 7.0.

  *Risky rule: [1] This rule is EXPERIMENTAL and is not covered with backward compatibility promise. [2] ``@return`` annotation is mandatory for the fixer to make changes, signatures of methods without it (no docblock, inheritdocs) will not be fixed. [3] Manual actions are required if inherited signatures are not properly documented. [4] ``@inheritdocs`` support is under construction.*

  Configuration options:

  - ``scalar_types`` (``bool``): fix also scalar types; may have unexpected
    behaviour due to PHP bad type coercion system; defaults to ``true``

* **phpdoc_trim** [@Symfony, @PhpCsFixer]

  PHPDoc should start and end with content, excluding the very first and
  last line of the docblocks.

* **phpdoc_trim_consecutive_blank_line_separation** [@Symfony, @PhpCsFixer]

  Removes extra blank lines after summary and after description in PHPDoc.

* **phpdoc_types** [@Symfony, @PhpCsFixer]

  The correct case must be used for standard PHP types in PHPDoc.

  Configuration options:

  - ``groups`` (a subset of ``['simple', 'alias', 'meta']``): type groups to fix;
    defaults to ``['simple', 'alias', 'meta']``

* **phpdoc_types_order** [@Symfony, @PhpCsFixer]

  Sorts PHPDoc types.

  Configuration options:

  - ``null_adjustment`` (``'always_first'``, ``'always_last'``, ``'none'``): forces the
    position of ``null`` (overrides ``sort_algorithm``); defaults to
    ``'always_first'``
  - ``sort_algorithm`` (``'alpha'``, ``'none'``): the sorting algorithm to apply;
    defaults to ``'alpha'``

* **phpdoc_var_annotation_correct_order** [@PhpCsFixer]

  ``@var`` and ``@type`` annotations must have type and name in the correct
  order.

* **phpdoc_var_without_name** [@Symfony, @PhpCsFixer]

  ``@var`` and ``@type`` annotations of classy properties should not contain
  the name.

* **pow_to_exponentiation** [@Symfony:risky, @PhpCsFixer:risky, @PHP56Migration:risky, @PHP70Migration:risky, @PHP71Migration:risky, @PHP74Migration:risky]

  Converts ``pow`` to the ``**`` operator.

  *Risky rule: risky when the function ``pow`` is overridden.*

* **pre_increment**

  Pre incrementation/decrementation should be used if possible.
  DEPRECATED: use ``increment_style`` instead.

* **protected_to_private** [@Symfony, @PhpCsFixer]

  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.

  *Risky rule: this fixer may change your class name, which will break the code that depends on the old name.*

  Configuration options:

  - ``dir`` (``string``): the directory where the project code is placed; defaults
    to ``''``

* **psr4** [@Symfony:risky, @PhpCsFixer:risky]

  Class names should match the file name.

  *Risky rule: this fixer may change your class name, which will break the code that depends on the old name.*

* **random_api_migration** [@PHP70Migration:risky, @PHP71Migration:risky, @PHP74Migration:risky]

  Replaces ``rand``, ``srand``, ``getrandmax`` functions calls with their ``mt_*``
  analogs.

  *Risky rule: risky when the configured functions are overridden.*

  Configuration options:

  - ``replacements`` (``array``): mapping between replaced functions with the new
    ones; defaults to ``['getrandmax' => 'mt_getrandmax', 'rand' =>
    'mt_rand', 'srand' => 'mt_srand']``

* **regular_callable_call**

  Callables must be called without using ``call_user_func*`` when possible.

  *Risky rule: risky when the ``call_user_func`` or ``call_user_func_array`` function is overridden.*

* **return_assignment** [@PhpCsFixer]

  Local, dynamic and directly referenced variables should not be assigned
  and directly returned by a function or method.

* **return_type_declaration** [@Symfony, @PhpCsFixer]

  There should be one or no space before colon, and one space after it in
  return type declarations, according to configuration.

  Configuration options:

  - ``space_before`` (``'none'``, ``'one'``): spacing to apply before colon; defaults to
    ``'none'``

* **self_accessor** [@Symfony:risky, @PhpCsFixer:risky]

  Inside class or interface element ``self`` should be preferred to the
  class name itself.

  *Risky rule: risky when using dynamic calls like get_called_class() or late static binding.*

* **self_static_accessor**

  Inside a ``final`` class or anonymous class ``self`` should be preferred to
  ``static``.

* **semicolon_after_instruction** [@Symfony, @PhpCsFixer]

  Instructions must be terminated with a semicolon.

* **set_type_to_cast** [@Symfony:risky, @PhpCsFixer:risky]

  Cast shall be used, not ``settype``.

  *Risky rule: risky when the ``settype`` function is overridden or when used as the 2nd or 3rd expression in a ``for`` loop .*

* **short_scalar_cast** [@Symfony, @PhpCsFixer, @PHP74Migration]

  Cast ``(boolean)`` and ``(integer)`` should be written as ``(bool)`` and
  ``(int)``, ``(double)`` and ``(real)`` as ``(float)``, ``(binary)`` as
  ``(string)``.

* **silenced_deprecation_error**

  Ensures deprecation notices are silenced. DEPRECATED: use
  ``error_suppression`` instead.

  *Risky rule: silencing of deprecation errors might cause changes to code behaviour.*

* **simple_to_complex_string_variable** [@PhpCsFixer]

  Converts explicit variables in double-quoted strings and heredoc syntax
  from simple to complex format (``${`` to ``{$``).

* **simplified_if_return**

  Simplify ``if`` control structures that return the boolean result of their
  condition.

* **simplified_null_return**

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

* **single_blank_line_at_eof** [@PSR2, @Symfony, @PhpCsFixer]

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

* **single_blank_line_before_namespace** [@Symfony, @PhpCsFixer]

  There should be exactly one blank line before a namespace declaration.

* **single_class_element_per_statement** [@PSR2, @Symfony, @PhpCsFixer]

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

  Configuration options:

  - ``elements`` (a subset of ``['const', 'property']``): list of strings which
    element should be modified; defaults to ``['const', 'property']``

* **single_import_per_statement** [@PSR2, @Symfony, @PhpCsFixer]

  There MUST be one use keyword per declaration.

* **single_line_after_imports** [@PSR2, @Symfony, @PhpCsFixer]

  Each namespace use MUST go on its own line and there MUST be one blank
  line after the use statements block.

* **single_line_comment_style** [@Symfony, @PhpCsFixer]

  Single-line comments and multi-line comments with only one line of
  actual content should use the ``//`` syntax.

  Configuration options:

  - ``comment_types`` (a subset of ``['asterisk', 'hash']``): list of comment types
    to fix; defaults to ``['asterisk', 'hash']``

* **single_line_throw** [@Symfony]

  Throwing exception must be done in single line.

* **single_quote** [@Symfony, @PhpCsFixer]

  Convert double quotes to single quotes for simple strings.

  Configuration options:

  - ``strings_containing_single_quote_chars`` (``bool``): whether to fix
    double-quoted strings that contains single-quotes; defaults to ``false``

* **single_trait_insert_per_statement** [@Symfony, @PhpCsFixer]

  Each trait ``use`` must be done as single statement.

* **space_after_semicolon** [@Symfony, @PhpCsFixer]

  Fix whitespace after a semicolon.

  Configuration options:

  - ``remove_in_empty_for_expressions`` (``bool``): whether spaces should be removed
    for empty ``for`` expressions; defaults to ``false``

* **standardize_increment** [@Symfony, @PhpCsFixer]

  Increment and decrement operators should be used if possible.

* **standardize_not_equals** [@Symfony, @PhpCsFixer]

  Replace all ``<>`` with ``!=``.

* **static_lambda**

  Lambdas not (indirect) referencing ``$this`` must be declared ``static``.

  *Risky rule: risky when using ``->bindTo`` on lambdas without referencing to ``$this``.*

* **strict_comparison** [@PhpCsFixer:risky]

  Comparisons should be strict.

  *Risky rule: changing comparisons to strict might change code behavior.*

* **strict_param** [@PhpCsFixer:risky]

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

  *Risky rule: risky when the fixed function is overridden or if the code relies on non-strict usage.*

* **string_line_ending** [@Symfony:risky, @PhpCsFixer:risky]

  All multi-line strings must use correct line ending.

  *Risky rule: changing the line endings of multi-line strings might affect string comparisons and outputs.*

* **switch_case_semicolon_to_colon** [@PSR2, @Symfony, @PhpCsFixer]

  A case should be followed by a colon and not a semicolon.

* **switch_case_space** [@PSR2, @Symfony, @PhpCsFixer]

  Removes extra spaces between colon and case value.

* **switch_continue_to_break** [@Symfony, @PhpCsFixer, @PHP73Migration, @PHP74Migration]

  Switch case must not be ended with ``continue`` but with ``break``.

* **ternary_operator_spaces** [@Symfony, @PhpCsFixer]

  Standardize spaces around ternary operator.

* **ternary_to_elvis_operator** [@Symfony:risky, @PhpCsFixer:risky]

  Use the Elvis operator ``?:`` where possible.

  *Risky rule: risky when relying on functions called on both sides of the ``?`` operator.*

* **ternary_to_null_coalescing** [@PHP70Migration, @PHP71Migration, @PHP73Migration, @PHP74Migration]

  Use ``null`` coalescing operator ``??`` where possible. Requires PHP >= 7.0.

* **trailing_comma_in_multiline_array** [@Symfony, @PhpCsFixer]

  PHP multi-line arrays should have a trailing comma.

  Configuration options:

  - ``after_heredoc`` (``bool``): whether a trailing comma should also be placed
    after heredoc end; defaults to ``false``

* **trim_array_spaces** [@Symfony, @PhpCsFixer]

  Arrays should be formatted like function/method arguments, without
  leading or trailing single line space.

* **unary_operator_spaces** [@Symfony, @PhpCsFixer]

  Unary operators should be placed adjacent to their operands.

* **visibility_required** [@PSR2, @Symfony, @PhpCsFixer, @PHP71Migration, @PHP73Migration, @PHP74Migration]

  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.

  Configuration options:

  - ``elements`` (a subset of ``['property', 'method', 'const']``): the structural
    elements to fix (PHP >= 7.1 required for ``const``); defaults to
    ``['property', 'method']``

* **void_return** [@PHP71Migration:risky, @PHP74Migration:risky]

  Add ``void`` return type to functions with missing or empty return
  statements, but priority is given to ``@return`` annotations. Requires
  PHP >= 7.1.

  *Risky rule: modifies the signature of functions.*

* **whitespace_after_comma_in_array** [@Symfony, @PhpCsFixer]

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

* **yoda_style** [@Symfony, @PhpCsFixer]

  Write conditions in Yoda style (``true``), non-Yoda style (``false``) or
  ignore those conditions (``null``) based on configuration.

  Configuration options:

  - ``always_move_variable`` (``bool``): whether variables should always be on non
    assignable side when applying Yoda style; defaults to ``false``
  - ``equal`` (``bool``, ``null``): style for equal (``==``, ``!=``) statements; defaults to
    ``true``
  - ``identical`` (``bool``, ``null``): style for identical (``===``, ``!==``) statements;
    defaults to ``true``
  - ``less_and_greater`` (``bool``, ``null``): style for less and greater than (``<``,
    ``<=``, ``>``, ``>=``) statements; defaults to ``null``


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

Config file
-----------

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 <https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/v2.16.1/src/ConfigInterface.php>`_
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:

.. code-block:: php

    <?php

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

    return (new PhpCsFixer\Config())
        ->setRules([
            '@PSR2' => true,
            'strict_param' => true,
            'array_syntax' => ['syntax' => 'short'],
        ])
        ->setFinder($finder)
    ;

**NOTE**: ``exclude`` will work only for directories, so if you need to exclude file, try ``notPath``.
Both ``exclude`` and ``notPath`` methods accept only relative paths to the ones defined with the ``in`` method.

See `Symfony\\Finder <https://symfony.com/doc/current/components/finder.html>`_
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.

.. code-block:: php

    <?php

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

    return (new PhpCsFixer\Config())
        ->setRules([
            '@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.

.. code-block:: php

    <?php

    return (new PhpCsFixer\Config())
        ->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:

.. code-block:: php

    <?php

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

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

.. code-block:: php

    <?php

    return (new PhpCsFixer\Config())
        ->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

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

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

Exit code
---------

Exit code 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.

(Applies to exit code of the ``fix`` command only)

Helpers
-------

Dedicated plugins exist for:

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

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).

.. _php-cs-fixer.phar: https://cs.symfony.com/download/php-cs-fixer-v2.phar
.. _Atom:              https://github.com/Glavin001/atom-beautify
.. _NetBeans:          http://plugins.netbeans.org/plugin/49042/php-cs-fixer
.. _PhpStorm:          https://medium.com/@valeryan/how-to-configure-phpstorm-to-use-php-cs-fixer-1844991e521f
.. _Sublime Text:      https://github.com/benmatselby/sublime-phpcs
.. _Vim:               https://github.com/stephpy/vim-php-cs-fixer
.. _VS Code:           https://github.com/junstyle/vscode-php-cs-fixer
.. _contribute:        https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/master/CONTRIBUTING.md