<documentation title="Control Structure Spacing">
    <standard>
    <![CDATA[
    Control Structures should have 0 spaces after opening parentheses and 0 spaces before closing parentheses.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: Correct spacing.">
        <![CDATA[
if (<em></em>$foo<em></em>) {
    $var = 1;
}
        ]]>
        </code>
        <code title="Invalid: Whitespace used inside the parentheses.">
        <![CDATA[
if (<em> </em>$foo<em> </em>) {
    $var = 1;
}
        ]]>
        </code>
    </code_comparison>
</documentation>