<documentation title="Scope Indentation">
    <standard>
    <![CDATA[
    Indentation for control structures, classes, and functions should be 4 spaces per level.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: 4 spaces are used to indent a control structure.">
        <![CDATA[
if ($test) {
<em>    </em>$var = 1;
}
        ]]>
        </code>
        <code title="Invalid: 8 spaces are used to indent a control structure.">
        <![CDATA[
if ($test) {
<em>        </em>$var = 1;
}
        ]]>
        </code>
    </code_comparison>
</documentation>