: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
* Similar to WordPress' `admin_url`, this returns a host-relative URL for the given path. It may be used to avoid
* canonicalization issues with CORS (e.g., the site is configured for the www. variant of the URL but doesn't forward
public static function relative_admin_url($path = '') {
$components = parse_url($url);
$s = $components['path'];
if (!empty($components['query'])) {
$s .= '?' . $components['query'];
if (!empty($components['fragment'])) {
$s .= '#' . $components['fragment'];