Custom PHP Code Sniffer ruleset, uses PSR2 as a base and uses tabs for indenting instead of spaces.

ruleset.xml

<?xml version="1.0"?>
<ruleset name="CustomCfg">
	<description>
		PSR2 style guide + tab indent instead of space.
	</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>