phpmd.xml

<?xml version="1.0"?>
<ruleset name="Parcel Pro PHPMD Ruleset"
         xmlns="http://pmd.sf.net/ruleset/1.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd"
         xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd">
    <description>The Parcel Pro mess detection ruleset.</description>

    <!-- See: https://phpmd.org/rules/index.html -->

    <rule ref="rulesets/cleancode.xml">
        <exclude name="StaticAccess"/>
        <exclude name="ElseExpression"/>
        <exclude name="BooleanArgumentFlag"/>
    </rule>

    <rule ref="rulesets/design.xml"/>

    <rule ref="rulesets/unusedcode.xml">
        <exclude name="UnusedLocalVariable"/>
    </rule>
    <!--
    We don't want to use the standard "UnusedLocalVariable" rule, since it gives a false-positive in this scenario:
    `foreach ($arr as $key => $value) {`
    where only `$key` is used.
    Instead, we want to be able to use `$_` instead of `$value` to indicate an unused variable.
    The above example would then become:
    `foreach ($arr as $key => $_) {`
    -->
    <rule ref="rulesets/unusedcode.xml/UnusedLocalVariable">
        <properties>
            <property name="exceptions" value="_"/>
        </properties>
    </rule>
</ruleset>