xamxam/app/templates/partials/form/form-help-block.php

<?php
/**
 * Renders a single form help block as HTML.
 *
 * Variables consumed:
 *   string $helpContent — raw Markdown string from the DB (may be empty).
 *   string $helpKey     — block key, used as element id.
 *
 * Outputs nothing when $helpContent is empty or whitespace-only.
 */

$helpContent = trim($helpContent ?? '');
if ($helpContent === '') {
    return;
}

$converter = new League\CommonMark\CommonMarkConverter(['html_input' => 'strip']);
$html = $converter->convert($helpContent)->getContent();
?>
<div class="student-help-block" id="help-<?= htmlspecialchars($helpKey ?? 'unknown') ?>">
    <?= $html ?>
</div>
<?php
unset($helpContent, $converter, $html);