: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
$bv_maintenance = plugin_dir_path(__FILE__) . '/wp_maintenance.php';
if (file_exists($bv_maintenance)) {
require_once $bv_maintenance;
header("Cache-Control: no-cache, no-store, must-revalidate");
header("Pragma: no-cache");
header('HTTP/1.1 503 Down For Maintenance');
echo BVWPMaintenance::$template;