ruleset.xml

<?xml version="1.0"?>
<ruleset name="PSR2Mage">
    <description>PSR2 with exclude rules for Magento 1 code</description>
    <!-- Include the whole PSR-2 standard -->
    <rule ref="PSR2">
        <exclude name="Squiz.Classes.ValidClassName"/>
        <exclude name="Generic.Files.LineLength.TooLong"/>
        <exclude name="PSR1.Classes.ClassDeclaration.MissingNamespace"/>
        <exclude name="PSR2.Classes.PropertyDeclaration.Underscore"/>
        <exclude name="PSR2.Methods.MethodDeclaration.Underscore"/>
    </rule>
    <rule ref="PEAR.NamingConventions.ValidClassName"/>
    <!-- Only one argument per line in multi-line function calls -->
    <rule ref="PEAR.Functions.FunctionCallSignature">
        <properties>
            <property name="allowMultipleArguments" value="false"/>
        </properties>
    </rule>
</ruleset>