ruleset.xml

<ruleset name="phpmd"
         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>PHPMD Rules</description>

    <rule ref="rulesets/cleancode.xml" />
    <rule ref="rulesets/codesize.xml" />
    <rule ref="rulesets/design.xml" />
    <rule ref="rulesets/controversial.xml" />
    <rule ref="rulesets/unusedcode.xml" />
    <rule ref="rulesets/naming.xml">
        <exclude name="ShortVariable"/>
    </rule>

    <rule ref="rulesets/naming.xml/ShortVariable">
        <properties>
            <property name="exceptions" value="io,id"/>
        </properties>
    </rule>
</ruleset>