False-positive in SlevomatCodingStandard.ControlStructures.RequireMultiLineTernaryOperator

[rosasurfer]

Given the following sniff configuration:

<rule ref="SlevomatCodingStandard.ControlStructures.RequireMultiLineTernaryOperator">
  <properties>
    <property name="lineLengthLimit" value="100"/>
  </properties>
</rule>

and the following test file/code:

<?php
declare(strict_types=1);

class PHPTest {

    public static function testPhpCs(): void {
        $config = isset($_GET['config']);
        ?>
        <a href="?">
           <?=$config ? 'Hide' : 'Show'?> Configuration
        </a>
        <?php
        echo '';
    }
}

Expected result: no error

Actual result:

The false-positive shows up depending on the terminating semicolon after the ternary. Without it, PHPCS scan until the next ; in the code which commonly exceeds the configured line limit.

However, in PHP the closing tag has the same function as a semicolon (statement terminator).

[kukulich]

our sniffs are not planned for use on templates and similar use cases...

[rosasurfer]

The issue is not about templates. It's about parsing of regular PHP. A closing tag is regular PHP. According to the docs, for short echo syntax the semicolon is part of the implicit echo statement.

[kukulich]

"and similar use cases..."