Change Server url dynamically for xampp or LIVE server in php

<?php 

$whitelist = array( '127.0.0.1', '::1', '192.168.2.10' );

if(in_array( $_SERVER['REMOTE_ADDR'], $whitelist)){

    $serverHost = 'http://'.$_SERVER['HTTP_HOST'].'/mentor/';

}else{

    $serverHost = 'http://'.$_SERVER['HTTP_HOST'].'/';

}


$PATH = $serverHost."abcsite/assets/";

?>