List of Available Rules

Alias

array_push (risky)

Converts simple usages of array_push($x, $y); to $x[] = $y;.
backtick_to_shell_exec

Converts backtick operators to shell_exec calls.
ereg_to_preg (risky)

Replace deprecated ereg regular expression functions with preg.
mb_str_functions (risky)

Replace non multibyte-safe functions with corresponding mb function.
modernize_strpos (risky)

Replace strpos() and stripos() calls with str_starts_with() or str_contains() if possible.
no_alias_functions (risky)

Master functions shall be used instead of aliases.
no_alias_language_construct_call

Master language constructs shall be used instead of aliases.
no_mixed_echo_print

Either language construct print or echo should be used.
pow_to_exponentiation (risky)

Converts pow to the ** operator.
random_api_migration (risky)

Replaces rand, srand, getrandmax functions calls with their mt_* analogs or random_int.
set_type_to_cast (risky)

Cast shall be used, not settype.

Array Notation

array_syntax

PHP arrays should be declared using the configured syntax.
no_multiline_whitespace_around_double_arrow

Operator => should not be surrounded by multi-line whitespaces.
no_trailing_comma_in_singleline_array (deprecated)

PHP single-line arrays should not have trailing comma.
no_whitespace_before_comma_in_array

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

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

If the function explicitly returns an array, and has the return type iterable, then yield from must be used instead of return.
trim_array_spaces

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

In array declaration, there MUST be a whitespace after each comma.
yield_from_array_to_yields (risky)

Yield from array must be unpacked to series of yields.

Attribute Notation

attribute_empty_parentheses

PHP attributes declared without arguments must (not) be followed by empty parentheses.
general_attribute_remove

Removes configured attributes by their respective FQN.
ordered_attributes

Sorts attributes using the configured sort algorithm.

Basic

braces (deprecated)

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

Braces must be placed as configured.
curly_braces_position (deprecated)

Curly braces must be placed as configured.
encoding

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

There must not be more than one statement per line.
no_trailing_comma_in_singleline

If a list of values separated by a comma is contained on a single line, then the last item MUST NOT have a trailing comma.
non_printable_character (risky)

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

Adds separators to numeric literals of any kind.
octal_notation

Literal octal must be in 0o notation.
psr_autoloading (risky)

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.
single_line_empty_body

Empty body of class, interface, trait, enum or function must be abbreviated as {} and placed on the same line as the previous symbol, separated by a single space.

Casing

class_reference_name_casing

When referencing an internal class it must be written using the correct casing.
constant_case

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

Integer literals must be in correct case.
lowercase_keywords

PHP keywords MUST be in lower case.
lowercase_static_reference

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

Magic constants should be referred to using the correct casing.
magic_method_casing

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

Function defined by PHP should be called using the correct casing.
native_function_type_declaration_casing (deprecated)

Native type declarations for functions should use the correct case.
native_type_declaration_casing

Native type declarations should be used in the correct case.

Cast Notation

cast_spaces

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

Cast should be written in lower case.
modernize_types_casting (risky)

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

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

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

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

Class Notation

class_attributes_separation

Class, trait and interface elements must be separated with one or none blank line.
class_definition

Whitespace around the keywords of a class, trait, enum or interfaces definition should be one space.
final_class (risky)

All classes must be final, except abstract ones and Doctrine entities.
final_internal_class (risky)

Internal classes should be final.
final_public_method_for_abstract_class (risky)

All public methods of abstract classes should be final.
modifier_keywords

Classes, constants, properties, and methods MUST have visibility declared, and keyword modifiers MUST be in the following order: inheritance modifier (abstract or final), visibility modifier (public, protected, or private), set-visibility modifier (public(set), protected(set), or private(set)), scope modifier (static), mutation modifier (readonly), type declaration, name.
no_blank_lines_after_class_opening

There should be no empty lines after class opening brace.
no_null_property_initialization

Properties MUST not be explicitly initialized with null except when they have a type declaration (PHP 7.4).
no_php4_constructor (risky)

Convert PHP4-style constructors to __construct.
no_unneeded_final_method (risky)

Removes final from methods where possible.
ordered_class_elements

Orders the elements of classes/interfaces/traits/enums.
ordered_interfaces

Orders the interfaces in an implements or interface extends clause.
ordered_traits (risky)

Trait use statements must be sorted alphabetically.
ordered_types

Sort union types and intersection types using configured order.
phpdoc_readonly_class_comment_to_keyword (risky)

Converts readonly comment on classes to the readonly keyword.
protected_to_private

Converts protected variables and methods to private where possible.
self_accessor (risky)

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

Inside an enum or final/anonymous class, self should be preferred over static.
single_class_element_per_statement

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

Each trait use must be done as single statement.
static_private_method (risky)

Converts private methods to static where possible.
visibility_required (deprecated)

Classes, constants, properties, and methods MUST have visibility declared, and keyword modifiers MUST be in the following order: inheritance modifier (abstract or final), visibility modifier (public, protected, or private), set-visibility modifier (public(set), protected(set), or private(set)), scope modifier (static), mutation modifier (readonly), type declaration, name.

Class Usage

date_time_immutable (risky)

Class DateTimeImmutable should be used instead of DateTime.

Comment

comment_to_phpdoc (risky)

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

Add, replace or remove header comment.
multiline_comment_opening_closing

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.
no_empty_comment

There should not be any empty comments.
no_trailing_whitespace_in_comment

There must be no trailing whitespace at the end of lines in comments and PHPDocs.
single_line_comment_spacing

Single-line comments must have proper spacing.
single_line_comment_style

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

Constant Notation

native_constant_invocation (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.

Control Structure

control_structure_braces

The body of each control structure MUST be enclosed within braces.
control_structure_continuation_position

Control structure continuation keyword must be on the configured line.
elseif

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

Empty loop-body must be in configured style.
empty_loop_condition

Empty loop-condition must be in configured style.
include

Include/Require and file path should be divided with a single space. File path should not be placed within parentheses.
no_alternative_syntax

Replace control structure alternative syntax to use braces.
no_break_comment

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

Replaces superfluous elseif with if.
no_trailing_comma_in_list_call (deprecated)

Remove trailing commas in list function calls.
no_unneeded_braces

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

Removes unneeded parentheses around control statements.
no_unneeded_curly_braces (deprecated)

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

There should not be useless else cases.
simplified_if_return

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

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

Removes extra spaces between colon and case value.
switch_continue_to_break

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

Arguments lists, array destructuring lists, arrays that are multi-line, match-lines and parameters lists must have a trailing comma.
yoda_style

Write conditions in Yoda style (true), non-Yoda style (['equal' => false, 'identical' => false, 'less_and_greater' => false]) or ignore those conditions (null) based on configuration.

Doctrine Annotation

doctrine_annotation_array_assignment

Doctrine annotations must use configured operator for assignment in arrays.
doctrine_annotation_braces

Doctrine annotations without arguments must use the configured syntax.
doctrine_annotation_indentation

Doctrine annotations must be indented with four spaces.
doctrine_annotation_spaces

Fixes spaces in Doctrine annotations.

Function Notation

combine_nested_dirname (risky)

Replace multiple nested calls of dirname by only one call with second $level parameter.
date_time_create_from_format_call (risky)

The first argument of DateTime::createFromFormat method must start with !.
fopen_flag_order (risky)

Order the flags in fopen calls, b and t must be last.
fopen_flags (risky)

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

Spaces should be properly placed in a function declaration.
function_typehint_space (deprecated)

Ensure single space between function's argument and its typehint.
implode_call (risky)

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

Lambda must not import variables it doesn't use.
method_argument_space

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.
multiline_promoted_properties (experimental)

Promoted properties must be on separate lines.
native_function_invocation (risky)

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

When making a method or function call, there MUST NOT be a space between the method or function name and the opening parenthesis.
no_trailing_comma_in_singleline_function_call (deprecated)

When making a method or function call on a single line there MUST NOT be a trailing comma after the last argument.
no_unreachable_default_argument_value (risky)

In function arguments there must not be arguments with default values before non-default ones.
no_useless_printf (risky)

There must be no printf calls with only the first argument.
no_useless_sprintf (risky)

There must be no sprintf calls with only the first argument.
nullable_type_declaration_for_default_null_value

Adds or removes ? before single type declarations or |null at the end of union types when parameters have a default null value.
phpdoc_to_param_type (experimental, risky)

Takes @param annotations of non-mixed types and adjusts accordingly the function signature.
phpdoc_to_property_type (experimental, risky)

Takes @var annotation of non-mixed types and adjusts accordingly the property signature..
phpdoc_to_return_type (experimental, risky)

Takes @return annotation of non-mixed types and adjusts accordingly the function signature.
regular_callable_call (risky)

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

Adjust spacing around colon in return type declarations and backed enum types.
single_line_throw

Throwing exception must be done in single line.
static_lambda (risky)

Lambdas not (indirectly) referencing $this must be declared static.
use_arrow_functions (risky)

Anonymous functions with return as the only statement must use arrow functions.
void_return (risky)

Add void return type to functions with missing or empty return statements, but priority is given to @return annotations.

Import

fully_qualified_strict_types

Removes the leading part of fully qualified symbol references if a given symbol is imported or belongs to the current namespace.
global_namespace_import

Imports or fully qualifies global classes/functions/constants.
group_import

There MUST be group use for the same namespaces.
no_leading_import_slash

Remove leading slashes in use clauses.
no_unneeded_import_alias

Imports should not be aliased as the same name.
no_unused_imports

Unused use statements must be removed.
ordered_imports

Ordering use statements.
single_import_per_statement

There MUST be one use keyword per declaration.
single_line_after_imports

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

Language Construct

class_keyword (experimental, risky)

Converts FQCN strings to *::class keywords.
class_keyword_remove (deprecated)

Converts ::class keywords to FQCN strings.
combine_consecutive_issets

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

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

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

There must not be spaces around declare statement parentheses.
dir_constant (risky)

Replaces dirname(__FILE__) expression with equivalent __DIR__ constant.
error_suppression (risky)

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

Add curly braces to indirect variables to make them clear to understand.
function_to_constant (risky)

Replace core functions calls returning constants with the constants.
get_class_to_class_keyword (risky)

Replace get_class calls on object variables with class keyword syntax.
is_null (risky)

Replaces is_null($var) expression with null === $var.
no_unset_on_property (risky)

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

Nullable single type declaration should be standardised using configured syntax.
single_space_after_construct (deprecated)

Ensures a single space after language constructs.
single_space_around_construct

Ensures a single space after language constructs.

List Notation

list_syntax

List (array destructuring) assignment should be declared using the configured syntax.

Namespace Notation

blank_line_after_namespace

There MUST be one blank line after the namespace declaration.
blank_lines_before_namespace

Controls blank lines before a namespace declaration.
clean_namespace

Namespace must not contain spacing, comments or PHPDoc.
no_blank_lines_before_namespace (deprecated)

There should be no blank lines before a namespace declaration.
no_leading_namespace_whitespace

The namespace declaration line shouldn't contain leading whitespace.
single_blank_line_before_namespace (deprecated)

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

Naming

no_homoglyph_names (risky)

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

Operator

assign_null_coalescing_to_coalesce_equal

Use the null coalescing assignment operator ??= where possible.
binary_operator_spaces

Binary operators should be surrounded by space as configured.
concat_space

Concatenation should be spaced according to configuration.
increment_style

Pre- or post-increment and decrement operators should be used if possible.
logical_operators (risky)

Use && and || logical operators instead of and and or.
long_to_shorthand_operator (risky)

Shorthand notation for operators should be used if possible.
new_expression_parentheses

All new expressions with a further call must (not) be wrapped in parentheses.
new_with_braces (deprecated)

All instances created with new keyword must (not) be followed by braces.
new_with_parentheses

All instances created with new keyword must (not) be followed by parentheses.
no_space_around_double_colon

There must be no space around double colons (also called Scope Resolution Operator or Paamayim Nekudotayim).
no_useless_concat_operator

There should not be useless concat operations.
no_useless_nullsafe_operator

There should not be useless Null-safe operator ?-> used.
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

There should not be space before or after object operators -> and ?->.
operator_linebreak

Operators - when multiline - must always be at the beginning or at the end of the line.
standardize_increment

Increment and decrement operators should be used if possible.
standardize_not_equals

Replace all <> with !=.
ternary_operator_spaces

Standardize spaces around ternary operator.
ternary_to_elvis_operator (risky)

Use the Elvis operator ?: where possible.
ternary_to_null_coalescing

Use null coalescing operator ?? where possible.
unary_operator_spaces

Unary operators should be placed adjacent to their operands.

PHP Tag

blank_line_after_opening_tag

Ensure there is no code on the same line as the PHP open tag and it is followed by a blank line.
echo_tag_syntax

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

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

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

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

PHPUnit

php_unit_assert_new_names (risky)

Rename deprecated PHPUnit assertions like assertFileNotExists to new methods like assertFileDoesNotExist.
php_unit_attributes

PHPUnit attributes must be used over their respective PHPDoc-based annotations.
php_unit_construct (risky)

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

Data provider method must be placed after/before the last/first test where used.
php_unit_data_provider_name (risky)

Data provider names must match the name of the test.
php_unit_data_provider_return_type (risky)

The return type of PHPUnit data provider must be iterable.
php_unit_data_provider_static (risky)

Data providers must be static.
php_unit_dedicate_assert (risky)

PHPUnit assertions like assertInternalType, assertFileExists, should be used over assertTrue.
php_unit_dedicate_assert_internal_type (risky)

PHPUnit assertions like assertIsArray should be used over assertInternalType.
php_unit_expectation (risky)

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

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

All PHPUnit test classes should be marked as internal.
php_unit_method_casing

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

Usages of ->getMock and ->getMockWithoutInvokingTheOriginalConstructor methods MUST be replaced by ->createMock or ->createPartialMock methods.
php_unit_mock_short_will_return (risky)

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

PHPUnit classes MUST be used in namespaced version, e.g. \PHPUnit\Framework\TestCase instead of \PHPUnit_Framework_TestCase.
php_unit_no_expectation_annotation (risky)

Usages of @expectedException* annotations MUST be replaced by ->setExpectedException* methods.
php_unit_set_up_tear_down_visibility (risky)

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

All PHPUnit test cases should have @small, @medium or @large annotation to enable run time limits.
php_unit_strict (risky)

PHPUnit methods like assertSame should be used instead of assertEquals.
php_unit_test_annotation (risky)

Adds or removes @test annotations from tests, following configuration.
php_unit_test_case_static_method_calls (risky)

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

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

PHPDoc

align_multiline_comment

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

Removes configured annotations from PHPDoc.
general_phpdoc_tag_rename

Renames PHPDoc tags.
no_blank_lines_after_phpdoc

There should not be blank lines between docblock and the documented element.
no_empty_phpdoc

There should not be empty PHPDoc blocks.
no_superfluous_phpdoc_tags

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

PHPDoc should contain @param for all params.
phpdoc_align

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

PHPDoc annotation descriptions should not be a sentence.
phpdoc_array_type (risky)

PHPDoc array<T> type must be used instead of T[].
phpdoc_indent

Docblocks should have the same indentation as the documented subject.
phpdoc_inline_tag_normalizer

Fixes PHPDoc inline tags.
phpdoc_line_span

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

PHPDoc list type must be used instead of array without a key.
phpdoc_no_access

@access annotations must be removed from PHPDoc.
phpdoc_no_alias_tag

No alias PHPDoc tags should be used.
phpdoc_no_empty_return

@return void and @return null annotations must be removed from PHPDoc.
phpdoc_no_package

@package and @subpackage annotations must be removed from PHPDoc.
phpdoc_no_useless_inheritdoc

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

Order PHPDoc tags by value.
phpdoc_order

Annotations in PHPDoc should be ordered in defined sequence.
phpdoc_param_order

Orders all @param annotations in DocBlocks according to method signature.
phpdoc_return_self_reference

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

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

Annotations in PHPDoc should be grouped together so that annotations of the same type immediately follow each other. Annotations of a different type are separated by a single blank line.
phpdoc_single_line_var_spacing

Single line @var PHPDoc should have proper spacing.
phpdoc_summary

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

Fixes casing of PHPDoc tags.
phpdoc_tag_no_named_arguments

There must be @no-named-arguments tag in PHPDoc of a class/enum/interface/trait.
phpdoc_tag_type

Forces PHPDoc tags to be either regular annotations or inline.
phpdoc_to_comment

Docblocks should only be used on structural elements.
phpdoc_trim_consecutive_blank_line_separation

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

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

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

Sorts PHPDoc types.
phpdoc_var_annotation_correct_order

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

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

Return Notation

no_useless_return

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

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

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

Semicolon

multiline_whitespace_before_semicolons

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

Remove useless (semicolon) statements.
no_singleline_whitespace_before_semicolons

Single-line whitespace before closing semicolon are prohibited.
semicolon_after_instruction

Instructions must be terminated with a semicolon.
space_after_semicolon

Fix whitespace after a semicolon.

Strict

declare_strict_types (risky)

Force strict types declaration in all files.
strict_comparison (risky)

Comparisons should be strict.
strict_param (risky)

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

String Notation

escape_implicit_backslashes (deprecated)

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

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

Unify heredoc or nowdoc closing marker.
heredoc_to_nowdoc

Convert heredoc to nowdoc where possible.
multiline_string_to_heredoc

Convert multiline string to heredoc or nowdoc.
no_binary_string

There should not be a binary flag before strings.
no_trailing_whitespace_in_string (risky)

There must be no trailing whitespace at the end of lines in strings.
simple_to_complex_string_variable

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

Convert double quotes to single quotes for simple strings.
string_implicit_backslashes

Handles implicit backslashes in strings and heredocs. Depending on the chosen strategy, it can escape implicit backslashes to ease the understanding of which are special chars interpreted by PHP and which not (escape), or it can remove these additional backslashes if you find them superfluous (unescape). You can also leave them as-is using ignore strategy.
string_length_to_empty (risky)

String tests for empty must be done against '', not with strlen.
string_line_ending (risky)

All multi-line strings must use correct line ending.

Whitespace

array_indentation

Each element of an array must be indented exactly once.
blank_line_before_statement

An empty line feed must precede any configured statement.
blank_line_between_import_groups

Putting blank lines between use statement groups.
compact_nullable_type_declaration

Remove extra spaces in a nullable type declaration.
compact_nullable_typehint (deprecated)

Remove extra spaces in a nullable typehint.
heredoc_indentation

Heredoc/nowdoc content must be properly indented.
indentation_type

Code MUST use configured indentation type.
line_ending

All PHP files must use same line ending.
method_chaining_indentation

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

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

There MUST NOT be spaces around offset braces.
no_spaces_inside_parenthesis (deprecated)

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

There must be no trailing whitespace at the end of non-blank lines.
no_whitespace_in_blank_line

Remove trailing whitespace at the end of blank lines.
single_blank_line_at_eof

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

Parentheses must be declared using the configured whitespace.
statement_indentation

Each statement must be indented.
type_declaration_spaces

Ensure single space between a variable and its type declaration in function arguments and properties.
types_spaces

A single space or none should be around union type and intersection type operators.

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