1<documentation title="Unnecessary String Concatenation">
2    <standard>
3    <![CDATA[
4    Strings should not be concatenated together.
5    ]]>
6    </standard>
7    <code_comparison>
8        <code title="Valid: A string can be concatenated with an expression.">
9        <![CDATA[
10echo '5 + 2 = ' . (5 + 2);
11        ]]>
12        </code>
13        <code title="Invalid: Strings should not be concatenated together.">
14        <![CDATA[
15echo 'Hello' . ' ' . 'World';
16        ]]>
17        </code>
18    </code_comparison>
19</documentation>
20