phpcs.xml

<?xml version="1.0"?>
<ruleset name="SS3">
    <description>Coding standard for SilverStripe 4.x</description>

    <!-- Don't sniff third party libraries -->
    <exclude-pattern>*/vendor/*</exclude-pattern>
    <exclude-pattern>*/thirdparty/*</exclude-pattern>

    <!-- Show progress and output sniff names on violation, and add colours -->
    <arg value="sp"/>
    <arg name="colors"/>

    <!-- Use PSR-2 as a base standard -->
    <rule ref="PSR2">
        <!-- Allow classes to not declare a namespace -->
        <exclude name="PSR1.Classes.ClassDeclaration.MissingNamespace"/>

        <!-- Allow underscores in class names -->
        <exclude name="Squiz.Classes.ValidClassName.NotCamelCaps"/>

        <!-- Allow non camel cased method names -->
        <exclude name="PSR1.Methods.CamelCapsMethodName.NotCamelCaps"/>

    </rule>

    <rule ref="Generic.Metrics.NestingLevel">
        <properties>
            <property name="nestingLevel" value="2" />
            <property name="absoluteNestingLevel" value="2" />
        </properties>
    </rule>

    <rule ref="vendor/object-calisthenics/phpcs-calisthenics-rules/src/ObjectCalisthenics/Sniffs/Files/FunctionLengthSniff.php">
        <properties>
            <property name="maxLength" value="40"/>
        </properties>
    </rule>
</ruleset>