1<documentation title="Opening Tag at Start of File">
2    <standard>
3    <![CDATA[
4    The opening php tag should be the first item in the file.
5    ]]>
6    </standard>
7    <code_comparison>
8        <code title="Valid: A file starting with an opening php tag.">
9        <![CDATA[
10<em></em><?php
11echo 'Foo';
12        ]]>
13        </code>
14        <code title="Invalid: A file with content before the opening php tag.">
15        <![CDATA[
16<em>Beginning content</em>
17<?php
18echo 'Foo';
19        ]]>
20        </code>
21    </code_comparison>
22</documentation>
23