File: vendor/squizlabs/php_codesniffer/src/Standards/Squiz/Docs/WhiteSpace/SuperfluousWhitespaceStandard.xml

<documentation title="Superfluous Whitespace">
    <standard>
    <![CDATA[
    There should be no superfluous whitespace at the start of a file.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: No whitespace preceding first content in file.">
        <![CDATA[<?php
echo 'opening PHP tag at start of file';
        ]]>
        </code>
        <code title="Invalid: Whitespace used before content in file.">
        <![CDATA[
<em>        </em>
<?php
echo 'whitespace before opening PHP tag';
        ]]>
        </code>
    </code_comparison>
    <standard>
    <![CDATA[
    There should be no trailing whitespace at the end of lines.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: No whitespace found at end of line.">
        <![CDATA[
echo 'semicolon followed by new line char';
        ]]>
        </code>
        <code title="Invalid: Whitespace found at end of line.">
        <![CDATA[
echo 'trailing spaces after semicolon';<em>   </em>
        ]]>
        </code>
    </code_comparison>
    <standard>
    <![CDATA[
    There should be no consecutive blank lines in functions.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: Functions do not contain multiple empty lines in a row.">
        <![CDATA[
function myFunction()
{
    echo 'code here';

    echo 'code here';
}
        ]]>
        </code>
        <code title="Invalid: Functions contain multiple empty lines in a row.">
        <![CDATA[
function myFunction()
{
    echo 'code here';
    <em>

    </em>echo 'code here';
}
        ]]>
        </code>
    </code_comparison>
    <standard>
    <![CDATA[
    There should be no superfluous whitespace after the final closing PHP tag in a file.
    ]]>
    </standard>
    <code_comparison>
        <code title="Valid: A single new line appears after the last content in the file.">
        <![CDATA[
function myFunction()
{
    echo 'Closing PHP tag, then';
    echo 'Single new line char, then EOF';
}

?><em>
</em>
        ]]>
        </code>
        <code title="Invalid: Multiple new lines appear after the last content in the file.">
        <![CDATA[
function myFunction()
{
    echo 'Closing PHP tag, then';
    echo 'Multiple new line chars, then EOF';
}

?><em>

</em>
        ]]>
        </code>
    </code_comparison>
</documentation>