phpmd_ruleset.xml

<?xml version="1.0"?>
<ruleset name="PHPMD rule set for my project" 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>Custom rules for checking my project</description>

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

    <rule ref="rulesets/design.xml">
        <exclude name="CouplingBetweenObjects"/>
    </rule>

    <rule ref="rulesets/design.xml/CouplingBetweenObjects">
        <properties>
            <property name="minimum" value="25" />
        </properties>
    </rule>

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

    <rule ref="rulesets/naming.xml/ShortVariable">
        <properties>
            <property name="minimum" value="2" />
        </properties>
    </rule>

    <rule ref="rulesets/naming.xml/LongVariable">
        <properties>
            <property name="maximum" value="30" />
        </properties>
    </rule>
</ruleset>