<?xml version="1.0"?>
<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="WordPress-Extra" xsi:noNamespaceSchemaLocation="https://schema.phpcodesniffer.com/phpcs.xsd">

	<description>Best practices beyond core WordPress Coding Standards</description>

	<rule ref="WordPress-Core"/>

	<!-- Silence the "no nested dirnames, use $levels" notice, which is included in Core,
		 as plugin/themes may still support PHP < 7.0. -->
	<rule ref="Modernize.FunctionCalls.Dirname.Nested">
		<severity>0</severity>
	</rule>

	<!-- Generic PHP best practices.
		 https://github.com/WordPress/WordPress-Coding-Standards/pull/382 -->
	<rule ref="Generic.PHP.DeprecatedFunctions"/>
	<rule ref="Generic.PHP.ForbiddenFunctions"/>
	<rule ref="Generic.CodeAnalysis.EmptyStatement"/>
	<rule ref="Generic.CodeAnalysis.ForLoopShouldBeWhileLoop"/>
	<rule ref="Generic.CodeAnalysis.ForLoopWithTestFunctionCall"/>
	<rule ref="Generic.CodeAnalysis.JumbledIncrementer"/>
	<rule ref="Generic.CodeAnalysis.UnconditionalIfStatement"/>
	<rule ref="Generic.CodeAnalysis.UnnecessaryFinalModifier"/>
	<rule ref="Generic.CodeAnalysis.UselessOverridingMethod"/>
	<rule ref="Generic.Classes.DuplicateClassName"/>
	<rule ref="Generic.Strings.UnnecessaryStringConcat">
		<properties>
			<property name="allowMultiline" value="true"/>
		</properties>
	</rule>
	<rule ref="Generic.Strings.UnnecessaryHeredoc"/>
	<rule ref="Generic.WhiteSpace.HereNowdocIdentifierSpacing"/>

	<!-- More generic PHP best practices.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/607 -->
	<rule ref="Squiz.PHP.NonExecutableCode"/>
	<rule ref="Squiz.Operators.IncrementDecrementUsage"/>
	<rule ref="Squiz.Operators.ValidLogicalOperators"/>
	<rule ref="Squiz.Functions.FunctionDuplicateArgument"/>

	<!-- And even more generic PHP best practices.
		 https://github.com/WordPress/WordPress-Coding-Standards/pull/809 -->
	<rule ref="Squiz.PHP.DisallowSizeFunctionsInLoops"/>

	<!-- Do not allow ambiguous conditions.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/2429 -->
	<rule ref="Generic.CodeAnalysis.RequireExplicitBooleanOperatorPrecedence"/>

	<!-- Check that functions use all parameters passed.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/1510 -->
	<rule ref="Generic.CodeAnalysis.UnusedFunctionParameter">
		<!-- Allow for callback functions which may not need all parameters passed. -->
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundBeforeLastUsed"/>
		<!-- Allow for functions in extended classes/implemented interfaces. -->
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInExtendedClass"/>
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInExtendedClassBeforeLastUsed"/>
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInExtendedClassAfterLastUsed"/>
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterface"/>
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceBeforeLastUsed"/>
		<exclude name="Generic.CodeAnalysis.UnusedFunctionParameter.FoundInImplementedInterfaceAfterLastUsed"/>
	</rule>

	<!-- Do not allow leading underscores in property or method names. Visibility should be used instead.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/1101 -->
	<rule ref="PSR2.Classes.PropertyDeclaration.Underscore">
		<severity>5</severity>
	</rule>
	<rule ref="PSR2.Methods.MethodDeclaration.Underscore">
		<severity>5</severity>
	</rule>

	<!-- Warn against using fully-qualified class names instead of the self keyword. -->
	<rule ref="Squiz.Classes.SelfMemberReference.NotUsed">
		<!-- Restore default severity of 5 which WordPress-Core sets to 0. -->
		<severity>5</severity>
	</rule>

	<rule ref="WordPress.Security.EscapeOutput"/>

	<!-- Encourage use of wp_safe_redirect() to avoid open redirect vulnerabilities.
		 https://github.com/WordPress/WordPress-Coding-Standards/pull/1264 -->
	<rule ref="WordPress.Security.SafeRedirect"/>

	<!-- Verify that a nonce check is done before using values in superglobals.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/73 -->
	<rule ref="WordPress.Security.NonceVerification"/>

	<rule ref="WordPress.PHP.DevelopmentFunctions"/>
	<rule ref="WordPress.PHP.DiscouragedPHPFunctions"/>
	<rule ref="WordPress.WP.DeprecatedFunctions"/>
	<rule ref="WordPress.WP.DeprecatedClasses"/>
	<rule ref="WordPress.WP.DeprecatedParameters"/>
	<rule ref="WordPress.WP.DeprecatedParameterValues"/>
	<rule ref="WordPress.WP.AlternativeFunctions"/>
	<rule ref="WordPress.WP.DiscouragedConstants"/>
	<rule ref="WordPress.WP.DiscouragedFunctions"/>

	<!-- Verify that capabilities are being used correctly. -->
	<rule ref="WordPress.WP.Capabilities"/>

	<!-- Scripts & style should be enqueued.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/35 -->
	<rule ref="WordPress.WP.EnqueuedResources"/>

	<!-- Warn against overriding WP global variables.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/26 -->
	<rule ref="WordPress.WP.GlobalVariablesOverride"/>

	<!-- Detect incorrect or risky use of the `ini_set()` function.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/1447 -->
	<rule ref="WordPress.PHP.IniSet"/>

	<!-- Check enqueue and register styles and scripts to have version and in_footer parameters explicitly set.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/1146 -->
	<rule ref="WordPress.WP.EnqueuedResourceParameters"/>


	<!-- Check for PHP Parse errors.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/522 -->
	<rule ref="Generic.PHP.Syntax"/>

	<!-- Make the translators comment check which is included in core stricter. -->
	<rule ref="WordPress.WP.I18n.MissingTranslatorsComment">
		<type>error</type>
	</rule>
	<rule ref="WordPress.WP.I18n.TranslatorsCommentWrongStyle">
		<type>error</type>
	</rule>

	<!-- Verify that everything in the global namespace is prefixed. -->
	<rule ref="WordPress.NamingConventions.PrefixAllGlobals"/>

	<!-- Validates post type slugs for valid characters, length and reserved keywords. -->
	<rule ref="WordPress.NamingConventions.ValidPostTypeSlug"/>

	<!-- https://github.com/WordPress/WordPress-Coding-Standards/issues/1157 -->
	<rule ref="WordPress.Security.PluginMenuSlug"/>
	<rule ref="WordPress.WP.CronInterval"/>
	<rule ref="WordPress.WP.PostsPerPage"/>

	<!-- Verify some regex best practices.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/1371 -->
	<rule ref="WordPress.PHP.PregQuoteDelimiter"/>

	<!-- The Core ruleset respects the PHP allowed functions list. For `Extra` the sniff is stricter.
		 https://github.com/WordPress/WordPress-Coding-Standards/pull/1450 -->
	<rule ref="WordPress.PHP.NoSilencedErrors">
		<properties>
			<property name="usePHPFunctionsList" value="false"/>
		</properties>
	</rule>

	<!-- Commented out code should not be committed.
		 https://github.com/WordPress/WordPress-Coding-Standards/pull/1463 -->
	<rule ref="Squiz.PHP.CommentedOutCode">
		<properties>
			<property name="maxPercentage" value="40"/>
		</properties>
	</rule>

	<!-- Prevent some typical mistakes people make accidentally.
		 https://github.com/WordPress/WordPress-Coding-Standards/pull/1777 -->
	<rule ref="WordPress.CodeAnalysis.EscapedNotTranslated"/>

	<!-- Detects duplicate array keys in array declarations. -->
	<rule ref="Universal.Arrays.DuplicateArrayKey"/>

	<!-- Disallows return type declarations on constructor/destructor methods,
		 and constructor/destructor methods returning a value. -->
	<rule ref="Universal.CodeAnalysis.ConstructorDestructorReturn"/>

	<!-- Detects foreach control structures using the same variable for both key and value. -->
	<rule ref="Universal.CodeAnalysis.ForeachUniqueAssignment"/>

	<!-- Detects using static instead of self in object-oriented constructs which are final. -->
	<rule ref="Universal.CodeAnalysis.StaticInFinalClass"/>

	<!-- Disallow if statements, if they are the only statement in an else block. -->
	<rule ref="Universal.ControlStructures.DisallowLonelyIf"/>

	<!-- Enforce for a file to either declare (global/namespaced) functions
		 or declare object-oriented structures, but not both. -->
	<rule ref="Universal.Files.SeparateFunctionsFromOO"/>

	<!-- Detect useless "echo sprintf(...)". -->
	<rule ref="Universal.CodeAnalysis.NoEchoSprintf"/>

	<!-- Detect use of double negative `!!`. -->
	<rule ref="Universal.CodeAnalysis.NoDoubleNegative"/>

	<!-- Flags calls to get_*_meta() and get_metadata*() functions
		 that include the $[meta_]key parameter but omit the $single parameter.
		 https://github.com/WordPress/WordPress-Coding-Standards/issues/2459 -->
	<rule ref="WordPress.WP.GetMetaSingle"/>

	<!--
	#############################################################################
	Code style sniffs for more recent PHP features and syntaxes.
	#############################################################################
	-->

	<!-- Check for single blank line after namespace declaration. -->
	<rule ref="PSR2.Namespaces.NamespaceDeclaration"/>

</ruleset>