friendica/ruleset.xml

<?xml version="1.0"?>
<ruleset name="Friendica">
    <description>Friendica Coding Standards: PSR2 with tabs instead of spaces</description>
    <arg name="tab-width" value="4"/>
    <rule ref="PSR2">
        <exclude name="Generic.WhiteSpace.DisallowTabIndent"/>
    </rule>
    <rule ref="Generic.WhiteSpace.DisallowSpaceIndent"/>
    <rule ref="Generic.WhiteSpace.ScopeIndent">
        <properties>
            <property name="indent" value="4"/>
            <property name="tabIndent" value="true"/>
        </properties>
    </rule>
</ruleset>