phpmd.xml

<?xml version="1.0" encoding="UTF-8" ?>
<pmd>
    <rule ref="rulesets/cleancode.xml">
        <exclude name="StaticAccess" />
    </rule>

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

    <rule ref="rulesets/naming.xml">
        <exclude name="ShortVariable" />
    </rule>

    <rule ref="rulesets/naming.xml/ShortVariable"
          since="0.2"
          message="Avoid variables with short names like {0}. Configured minimum length is {1}."
          class="PHPMD\Rule\Naming\ShortVariable"
          externalInfoUrl="http://phpmd.org/rules/naming.html#shortvariable">
        <priority>3</priority>
        <properties>
            <property name="minimum" description="Minimum length for a variable, property or parameter name" value="3"/>
            <property name="exceptions" value="id,q,w,i,j,k,v,e,f,fp" />
        </properties>
    </rule>

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