<documentation title="Forbidden Functions">
    <standard>
    <![CDATA[
    The forbidden functions sizeof and delete should not be used.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: count is used in place of sizeof.">
        <![CDATA[
$foo = <em>count</em>($bar);
        ]]>
        </code>
        <code title="Invalid: sizeof is used.">
        <![CDATA[
$foo = <em>sizeof</em>($bar);
        ]]>
        </code>
    </code_comparison>
</documentation>