Wordpress Maintenance mode

Asset.txt

<?php
/**
 * Maintenance WordPress file
 *
 * Rename this file to .maintenance and
 * Wordpress will enter maintenance mode. 
 * 
 * It will look for a "maintenance.php" 
 * file inside wp-contents folder
 * 
 * Allowed IPs: insert you machine IP 
 * to visit the normal site.
 *
 */

	$allow = array('201.37.47.79', '177.41.105.163');
	if(!in_array($_SERVER['REMOTE_ADDR'], $allow)) {
	$upgrading = time();
	}
?>