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  • 2.0.1 2.0.1

    • Fixed spacesCountAroundEqualsSign settings for DeclareStrictTypesSniff
    • TypeHintDeclaration.UselessDocComment was sometimes reported for generator functions
  • 2.0 2.0

    Slevomat Coding Standard 2.0

    New major version has been in the works for a long time. Its main focus is to help projects with transition from PHP 5.x to PHP 7.0 and 7.1, but includes a lot of other cool features as well.

    All new sniffs are flexible and configurable and although we'd like you to, it's not required to use the coding standard as a whole, you can choose only the sniffs that make sense to you and make your code better.

    The release notes only focus on the changes, you can find the complete documentation and manual in the project's README.

    🔧 = Automatic errors fixing

    🚧 = Sniff check can be suppressed locally using @phpcsSuppress annotation with the name of the sniff

    New sniffs:

    Functional - improving the safety and behaviour of code

    SlevomatCodingStandard.TypeHints.TypeHintDeclaration 🔧🚧

    • Checks for missing property types in phpDoc @var.
    • Checks for missing typehints in case they can be declared natively. If the phpDoc contains something that can be written as a native PHP 7.0 or 7.1 typehint, this sniff reports that.
    • Checks for missing @return and/or native return typehint in case the method body contains return with a value.
    • Checks for useless doc comments. If the native method declaration contains everything and the phpDoc does not add anything useful, it's reported as useless and can optionally be automatically removed with phpcbf.
    • Some phpDocs might still be useful even if they do not add any typehint information. They can contain textual descriptions of code elements and also some meaningful annotations like @expectException or @dataProvider. These annotations that prevent the phpDoc to be marked as useless and removed can be configured in usefulAnnotations property.
    • Forces to specify what's in traversable types like array, iterable and \Traversable. Additional traversable types like custom collections can be configured using traversableTypeHints property.
    • Distinguishes what's possible in PHP 7.0 (scalar typehints) and PHP 7.1 (nullable types and void return typehint).

    SlevomatCodingStandard.Exceptions.ReferenceThrowableOnly 🔧

    In PHP 7.0, a Throwable interface was added that allows catching and handling errors in more cases than Exception previously allowed. So if the catch statement contained Exception on PHP 5.x, it means it should probably be rewritten to reference Throwable on PHP 7.x. This sniff enforces that.

    SlevomatCodingStandard.TypeHints.DeclareStrictTypes 🔧

    Enforces having declare(strict_types = 1) at the top of each PHP file. Allows configuring how many newlines should be between the <?php opening tag and the declare statement.


    Disallows assignments in if, elseif and do-while loop conditions:

    if ($file = findFile($path)) {

    Assignment in while loop condition is specifically allowed because it's commonly used.

    This is a great addition to already existing SlevomatCodingStandard.ControlStructures.YodaComparison because it prevents the danger of assigning something by mistake instead of using comparison operator like ===.

    SlevomatCodingStandard.ControlStructures.DisallowEqualOperators 🔧

    Disallows using loose == and != comparison operators. Use === and !== instead, they are much more secure and predictable.

    Cleaning - detecting dead code


    This sniffs finds unreachable catch blocks:

    try {
    } catch (\Throwable $e) {
    } catch (\InvalidArgumentException $e) {
    	// unreachable!

    Formatting - rules for consistent code looks


    In PHP 7.1 it's possible to declare visibility of class constants. In a similar vein to optional declaration of visibility for properties and methods which is actually required in sane coding standards, this sniff also requires to declare visibility for all class constants.

    const FOO = 1; // visibility missing!
    public const BAR = 2; // correct

    On PHP 7.0, this sniff must be manually excluded.

    SlevomatCodingStandard.TypeHints.ReturnTypeHintSpacing 🔧

    Enforces consistent formatting of return typehints, like this:

    function foo(): ?int

    SlevomatCodingStandard.TypeHints.NullableTypeForNullDefaultValue 🔧

    Checks whether the nullablity ? symbol is present before each nullable and optional parameter (which are marked as = null):

    function foo(
    	int $foo = null, // ? missing
    	?int $bar = null // correct
    ) {

    On PHP 7.0, this sniff must be manually excluded.

    SlevomatCodingStandard.TypeHints.ParameterTypeHintSpacing 🔧

    • Checks that there's a single space between a typehint and a parameter name: Foo $foo
    • Checks that there's no whitespace between a nullability symbol and a typehint: ?Foo


    Enforces fully qualified names of classes and interfaces in phpDocs - in @var, @param, @return, @throws. This results in unambiguous phpDocs.


    Enforces using shorthand scalar typehint variants in phpDocs: int instead of integer and bool instead of boolean. This is for consistency with native scalar typehints which also allow shorthand variants only.

    SlevomatCodingStandard.Commenting.ForbiddenAnnotations 🔧

    Reports forbidden annotations. No annotations are forbidden by default, the configuration is completely up to the user. It's recommended to forbid obsolete and inappropriate annotations like:

    • @author, @created, @version - we have version control systems
    • @package - we have namespaces
    • @copyright, @license - it's not necessary to repeat licensing information in each file
    • @throws - it's not possible to enforce this annotation and the information can become outdated


    Group use declarations are ugly, make diffs ugly and this sniffs prohibits them.

    Enhancements and changes to existing sniffs:

    • Exceptions-related sniffs were updated to support PHP 7.1 exception union types in catch blocks

    SlevomatCodingStandard.Classes.UnusedPrivateElements 🚧

    • Checks for unused private constants
    • Supports suppressing reports of unused elements with @phpcsSuppress

    SlevomatCodingStandard.Namespaces.ReferenceUsedNamesOnly 🔧

    • Sniff is now automatically fixable
    • Added option to allow fully qualified name for a class with a colliding use: allowFullyQualifiedNameForCollidingClasses


    • Allows different file extensions using extensions property

    BC breaks:

    • PHP-Parallel-Lint was removed from dependencies to gain flexibility and loosen up dependencies. It is recommended to install and run the tool before running the sniffs because in a lot of instances, sniffs assume they are executed on valid PHP code. When executed on invalid code, they can lead to unexpected results and even infinite loops.
  • 1.1.1 1.1.1

    • UnusedUsesSniff - when a class implemented multiple interfaces with names listed in uses, the 2nd and next interfaces' use statements were marked as unused. (#55)
    • ReferenceUsedNamesOnlySniff - \Exception, \Throwable and PHP Errors referenced in files without namespace now report ReferenceViaFullyQualifiedNameWithoutNamespace code - consistent behaviour with other names. (f4c1d43)
    • FullyQualifiedExceptionsSniff & ReferenceUsedNamesOnlySniff - added configuration property ignoredNames. It should be used for type names that look like an exception (e. g. end with Exception or Error) but aren't. One example directly from PHP is LibXMLError. The sniffs will not enforce references to these types to be fully qualified. (#52 and #57)
  • 1.1

    • Consistent behaviour for fully qualified Throwable and Errors without any additional configuration (#41)
    • Support for use const and use function in AlphabeticallySortedUsesSniff (#47) - constants and functions are ordered at the end matching behaviour of "Optimize Imports" in PhpStorm
    • Support for use const and use function in UnusedUsesSniff (#43) - use statement will be marked as used only when a matching language construct mentions the used name (use const for referenced constants, use function for invoked functions and classes/interfaces/traits otherwise)
    • UnusedUsesSniff with searchAnnotations set to true (not enabled by default - see README) now searches phpDocs as fulltext (#25) - previously, used name had to be referenced in a listed and supported format. But there are a lot of formats annotations can be written in so the implementation was changed to a simple fulltext search of the used name in all phpDocs in a file.
    • Autoload sniffs in Composer so they can be used in 3rd party apps (#50)
  • 1.0.7 1.0.7

    • Updated dependencies (80f01d0)
    • Fixed phpdoc (78a44c5)
    • Fixed PHPStan configuration so it works on Windows too (cc8a132)
    • Added callable to ReferencedNameHelper (1986b15)
    • UnusedPrivateElementsSniff - optimization for classes without methods (702b989)
    • UnusedPrivateElementsSniff sometimes stopped prematurely after checking properties with multiple modifiers (3a3d1e7)
  • 1.0.6

    • Class constant is not a referenced name (5269229) (#21)
  • 1.0.5

    • Fixed ReferencedNameHelper to return underscored names from annotations (10726ed) (#10 #11)
    • Static analysis with PHPStan (3eaa085) (#13)
    • Normalize array properties (c117fe1) (#12)
  • 1.0.4

    • PHP7: return typehints are included in referenced names (cf23871)
    • Updated Consistence Coding Standard (6ef9a07)
  • 1.0.3

    • UnusedPrivateElementsSniff - fixed handling always-used property annotations (172a023)
  • 1.0.2

    • Fixed YodaComparisonSniff for negative or plus-prepended expressions (1a53b21)
    • ReferencedNameHelper - search in complex annotations (e. g. \Foo|\Bar) (46cd765)
    • UnusedPrivateElementsSniff - do not report private constructor (9dd9738)
    • UnusedPrivateElementsSniff - configurable always-used properties (f39a5e6)
    • ReferencedNameHelper - result contains traits used in a class (d93b9d4)
  • 1.0.1

    Fix FilepathNamespaceExtractor on Windows

  • 1.0.0 First stable open-source release

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