functions.md

November 22, 2025 · View on GitHub

Functions

SlevomatCodingStandard.Functions.ArrowFunctionDeclaration 🔧

Checks fn declaration.

Sniff provides the following settings:

  • spacesCountAfterKeyword: the number of spaces after fn.
  • spacesCountBeforeArrow: the number of spaces before =>.
  • spacesCountAfterArrow: the number of spaces after =>.
  • allowMultiLine: allows multi-line declaration.

SlevomatCodingStandard.Functions.DisallowArrowFunction

Disallows arrow functions.

SlevomatCodingStandard.Functions.DisallowEmptyFunction

Reports empty functions body and requires at least a comment inside.

SlevomatCodingStandard.Functions.FunctionLength

Disallows long functions. This sniff provides the following setting:

  • includeComments (default: false): should comments be included in the count.
  • includeWhitespace (default: false): should empty lines be included in the count.
  • maxLinesLength (default: 20): specifies max allowed function lines length.

SlevomatCodingStandard.Functions.RequireArrowFunction 🔧

Requires arrow functions.

Sniff provides the following settings:

  • allowNested (default: true)
  • enable: either to enable or not this sniff. By default, it is enabled for PHP versions 7.4 or higher.

SlevomatCodingStandard.Functions.RequireMultiLineCall 🔧

Enforces function call to be split to more lines so each parameter is on its own line.

Sniff provides the following settings:

  • minLineLength: specifies min line length to enforce call to be split. Use 0 value to enforce for all calls, regardless of length.
  • minParametersCount: specifies min parameters count to enforce call to be split.
  • excludedCallPatterns: allows to configure which calls are excluded from sniff detection. This is an array of regular expressions (PCRE) with delimiters.

SlevomatCodingStandard.Functions.RequireSingleLineCall 🔧

Enforces function call to be on a single line.

Sniff provides the following settings:

  • maxLineLength: specifies max allowed line length. If call would fit on it, it's enforced. Use 0 value to enforce for all calls, regardless of length.
  • ignoreWithComplexParameter (default: true): ignores calls with arrays, closures, arrow functions and nested calls.

SlevomatCodingStandard.Functions.DisallowNamedArguments

This sniff disallows usage of named arguments.

SlevomatCodingStandard.Functions.NamedArgumentSpacing 🔧

Checks spacing in named argument.

SlevomatCodingStandard.Functions.DisallowTrailingCommaInCall 🔧

This sniff disallows trailing commas in multi-line calls.

This sniff provides the following setting:

  • onlySingleLine: to enable checks only for single-line calls.

SlevomatCodingStandard.Functions.RequireTrailingCommaInCall 🔧

Commas after the last parameter in function or method call make adding a new parameter easier and result in a cleaner versioning diff.

This sniff enforces trailing commas in multi-line calls.

This sniff provides the following setting:

  • enable: either to enable or not this sniff. By default, it is enabled for PHP versions 7.3 or higher.

SlevomatCodingStandard.Functions.DisallowTrailingCommaInClosureUse 🔧

This sniff disallows trailing commas in multi-line use of closure declaration.

This sniff provides the following setting:

  • onlySingleLine: to enable checks only for single-line use declarations.

SlevomatCodingStandard.Functions.RequireTrailingCommaInClosureUse 🔧

Commas after the last inherited variable in multi-line use of closure declaration make adding a new variable easier and result in a cleaner versioning diff.

This sniff enforces trailing commas in multi-line declarations.

This sniff provides the following setting:

  • enable: either to enable or not this sniff. By default, it is enabled for PHP versions 8.0 or higher.

SlevomatCodingStandard.Functions.DisallowTrailingCommaInDeclaration 🔧

This sniff disallows trailing commas in multi-line declarations.

This sniff provides the following setting:

  • onlySingleLine: to enable checks only for single-line declarations.

SlevomatCodingStandard.Functions.RequireTrailingCommaInDeclaration 🔧

Commas after the last parameter in function or method declaration make adding a new parameter easier and result in a cleaner versioning diff.

This sniff enforces trailing commas in multi-line declarations.

This sniff provides the following setting:

  • enable: either to enable or not this sniff. By default, it is enabled for PHP versions 8.0 or higher.

SlevomatCodingStandard.Functions.StaticClosure 🔧

Reports closures not using $this that are not declared static.

SlevomatCodingStandard.Functions.StrictCall

Some functions have $strict parameter. This sniff reports calls to these functions without the parameter or with $strict = false.

SlevomatCodingStandard.Functions.UnusedInheritedVariablePassedToClosure 🔧

Looks for unused inherited variables passed to closure via use.

SlevomatCodingStandard.Functions.UnusedParameter 🚧

Looks for unused parameters.

This sniff provides the following setting:

  • allowedParameterPatterns: allows to configure which parameters are always allowed, even if unused. This is an array of regular expressions (PCRE) with delimiters, but without the leading $ from variable names. (For example, use [/^_/] to allow parameters that start with an underscore, like $_unused.)

SlevomatCodingStandard.Functions.UselessParameterDefaultValue 🚧

Looks for useless parameter default value.