File: vendor/squizlabs/php_codesniffer/src/Standards/PEAR/Docs/ControlStructures/ControlSignatureStandard.xml

<documentation title="Control Structure Signatures">
    <standard>
    <![CDATA[
    Control structures should use one space around the parentheses in conditions.  The opening brace should be preceded by one space and should be at the end of the line.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: Correct spacing around the condition.">
        <![CDATA[
if<em> </em>($foo)<em> </em>{
}
        ]]>
        </code>
        <code title="Invalid: Incorrect spacing around the condition.">
        <![CDATA[
if<em></em>($foo)<em></em>{
}
        ]]>
        </code>
    </code_comparison>
    <code_comparison>
        <code title="Valid: Correct placement of the opening brace.">
        <![CDATA[
if ($foo) <em>{</em>
}
        ]]>
        </code>
        <code title="Invalid: Incorrect placement of the opening brace on a new line.">
        <![CDATA[
if ($foo)
<em>{</em>
}
        ]]>
        </code>
    </code_comparison>
</documentation>