ruleset.xml

<?xml version="1.0"?>
<ruleset name="Required">
	<description>required Coding Standards</description>

	<!-- Check all PHP files in directory tree by default. -->
	<arg name="extensions" value="php"/>

	<!-- Show progress and sniff codes in all reports -->
	<arg value="ps"/>

	<!-- Check up to 20 files simultaneously. -->
	<arg name="parallel" value="20"/>

	<!-- Whenever possible, cache the scan results and re-use those for unchanged files on the next scan. -->
	<arg name="cache"/>

	<!-- Adds support for .phpcsignore
 		https://github.com/squizlabs/PHP_CodeSniffer/issues/1884 -->
	<autoload>./bootstrap.php</autoload>

	<exclude-pattern>*/node_modules/*</exclude-pattern>
	<exclude-pattern>*/vendor/*</exclude-pattern>
	<exclude-pattern>*\.min\.*</exclude-pattern>

	<!-- Analysis of problematic variable use. -->
	<rule ref="VariableAnalysis"/>

	<rule ref="WordPress-Core">
		<exclude name="WordPress.Files.FileName.NotHyphenatedLowercase"/>
		<exclude name="WordPress.Files.FileName.InvalidClassFileName"/>
		<exclude name="Generic.Arrays.DisallowShortArraySyntax"/>
		<exclude name="WordPress.PHP.DisallowShortTernary"/>
	</rule>

	<rule ref="WordPress-Docs">
		<!-- Documentation is organized with the use of namespaces. -->
		<exclude name="Squiz.Commenting.FileComment.MissingPackageTag"/>
	</rule>

	<rule ref="WordPress-Extra">
		<!-- _e() and _ex() are considered safe for internal translations -->
		<exclude name="WordPress.Security.EscapeOutput.UnsafePrintingFunction"/>
	</rule>

	<rule ref="WordPress.Files.FileName">
		<properties>
			<property name="strict_class_file_names" value="false"/>
		</properties>
	</rule>

	<!-- Allow . in hook names. -->
	<rule ref="WordPress.NamingConventions.ValidHookName">
		<properties>
			<property name="additionalWordDelimiters" value="."/>
		</properties>
	</rule>

	<!-- File Layout: Declare symbols or run code, but not both. -->
	<rule ref="PSR1.Files.SideEffects"/>

	<!-- Enforces short array syntax. -->
	<rule ref="Generic.Arrays.DisallowLongArraySyntax"/>

	<rule ref="WordPress.Security.EscapeOutput">
		<properties>
			<property name="customAutoEscapedFunctions" type="array">
				<!-- i18n functions are considered safe for internal translations. -->
				<element value="__"/>
				<element value="_x"/>
				<element value="_n"/>
				<element value="_nx"/>
				<element value="number_format_i18n"/>
				<element value="date_i18n"/>

				<!-- Considered some template functions as safe. -->
				<element value="paginate_links"/>
			</property>
		</properties>
	</rule>

	<!-- Make sure longer multiple statements are always properly aligned. -->
	<rule ref="WordPress.Arrays.MultipleStatementAlignment">
		<properties>
			<property name="maxColumn" value="200"/>
		</properties>
	</rule>

	<!-- Allow the use of filesystem functions. -->
	<rule ref="WordPress.WP.AlternativeFunctions">
		<properties>
			<property name="exclude" type="array">
				<element value="file_get_contents"/>
			</property>
		</properties>
	</rule>

	<rule ref="Squiz.PHP.CommentedOutCode">
		<properties>
			<property name="maxPercentage" value="75"/>
		</properties>
	</rule>

	<!-- Checks that there's no whitespace between a nullability symbol and a typehint. -->
	<rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHintSpacing"/>
	<!-- Checks whether the nullablity ? symbol is present before each nullable and optional parameter. -->
	<rule ref="SlevomatCodingStandard.TypeHints.NullableTypeForNullDefaultValue"/>
	<!-- Enforce no space between closing brace and colon of return typehint. -->
	<rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHintSpacing">
		<properties>
			<property name="spacesCountBeforeColon" value="0"/>
		</properties>
	</rule>
	<!-- Enforces using shorthand scalar typehint variants in phpDocs. -->
	<rule ref="SlevomatCodingStandard.TypeHints.LongTypeHints"/>

	<!-- Disallows grouped use declarations. -->
	<rule ref="SlevomatCodingStandard.Namespaces.DisallowGroupUse"/>
	<!-- Disallows leading backslash in use statement. -->
	<rule ref="SlevomatCodingStandard.Namespaces.UseDoesNotStartWithBackslash"/>
	<!-- Enforces fully qualified names of classes and interfaces in annotations. -->
	<rule ref="SlevomatCodingStandard.Namespaces.FullyQualifiedClassNameInAnnotation"/>
	<!-- Checks whether uses at the top of a file are alphabetically sorted. -->
	<rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses"/>
	<!-- Enforces one space after namespace, disallows content between namespace name and semicolon and disallows use of bracketed syntax. -->
	<rule ref="SlevomatCodingStandard.Namespaces.NamespaceDeclaration"/>
	<!-- Prohibits multiple uses separated by commas. -->
	<rule ref="SlevomatCodingStandard.Namespaces.MultipleUsesPerLine"/>
	<!-- Enforces one blank line before and after namespace. -->
	<rule ref="SlevomatCodingStandard.Namespaces.NamespaceSpacing">
		<properties>
			<property name="linesCountBeforeNamespace" value="1"/>
			<property name="linesCountAfterNamespace" value="1"/>
		</properties>
	</rule>
	<!-- Enforces one blank before first use, after last use and none between two different types of use. -->
	<rule ref="SlevomatCodingStandard.Namespaces.UseSpacing">
		<properties>
			<property name="linesCountBeforeFirstUse" value="1"/>
			<property name="linesCountBetweenUseTypes" value="0"/>
			<property name="linesCountAfterLastUse" value="1"/>
		</properties>
	</rule>
	<!-- Prohibits uses from the same namespace. -->
	<rule ref="SlevomatCodingStandard.Namespaces.UseFromSameNamespace"/>
	<!-- All references to types named Exception or ending with Exception must be referenced via a fully qualified name. -->
	<rule ref="SlevomatCodingStandard.Namespaces.FullyQualifiedExceptions"/>
	<!-- Looks for unused imports from other namespaces. -->
	<rule ref="SlevomatCodingStandard.Namespaces.UnusedUses"/>

	<!-- Class names should be referenced via ::class constant when possible. -->
	<rule ref="SlevomatCodingStandard.Classes.ModernClassNameReference"/>

	<!-- Requires use of null coalesce operator (??) when possible. -->
	<rule ref="SlevomatCodingStandard.ControlStructures.RequireNullCoalesceOperator"/>

	<!-- Reports forbidden annotations. -->
	<rule ref="SlevomatCodingStandard.Commenting.ForbiddenAnnotations">
		<properties>
			<property name="forbiddenAnnotations" type="array">
				<element value="@package"/>
				<element value="@author"/>
				<element value="@created"/>
				<element value="@copyright"/>
				<element value="@license"/>
				<element value="@access"/>
				<element value="@version"/>
			</property>
		</properties>
	</rule>

	<!--Require the latest version of WordPress. -->
	<config name="minimum_supported_wp_version" value="4.9"/>

	<!-- Run against the PHPCompatibilityWP ruleset -->
	<rule ref="PHPCompatibilityWP"/>

	<config name="testVersion" value="7.1-"/>
</ruleset>