md-ruleset.xml

<?xml version="1.0"?>
<ruleset name="My first PHPMD rule set"
         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>
        Mk Default Code rule set
    </description>

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

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

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

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

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

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

    <rule ref="rulesets/naming.xml/LongVariable"
          since="0.2"
          message="Avoid excessively long variable names like {0}. Keep variable name length under {1}."
          class="PHPMD\Rule\Naming\LongVariable"
          externalInfoUrl="http://phpmd.org/rules/naming.html#longvariable">
        <description>
            Detects when a field, formal or local variable is declared with a long name.
        </description>
        <priority>3</priority>
        <properties>
            <property name="maximum" description="The variable length reporting threshold" value="25"/>
        </properties>
    </rule>
</ruleset>