<ul><li>Fixed <code>custom_domain.php</code>: <code>$rsDomainStatus</code>, <code>$rsRegistrar</code>, and <code>$rsOwnerID</code> used but never initialized — added <code>?? null</code> null coalescing initializations at top of file; these were previously populated by an <code>extract()</code> call that no longer exists</li><li>Fixed <code>website_settings.php</code> line 160: <code>$_GET[siteid]</code> undefined array key — added <code>?? </code></li><li>Fixed <code>website_settings.php</code> line 1053 (×4 occurrences): <code>(isset($_GET[siteid]))?$_GET[siteid]:$_REQUEST[siteid]</code> — $_REQUEST[siteid] accessed without null safety when GET param missing — replaced with <code>$_GET[siteid] ?? $_REQUEST[siteid] ?? </code></li><li>Fixed <code>settings.php</code> line 13: same $_REQUEST[siteid] fallback missing null safety — replaced with <code>$siteidget ?? $_REQUEST[siteid] ?? </code></li></ul>