Auto change siteurl wordpress

auto_default_base_url.php

<?php 
include 'wp-load.php';
$folder = $_GET['folder'];
$results = $wpdb->get_results( "SELECT option_id,option_name,option_value FROM wp_options WHERE option_name = 'home' OR option_name = 'siteurl'");
$rows     = count($results);
if($rows > 0 AND is_array($results)){
  $host =  $_SERVER['HTTP_HOST'];
  $site_url = $results[0]->option_value;
  $home     = $results[1]->option_value;
  if(
    $host != $site_url AND 
    $host != $home AND
    $site_url === $home
    ){
    $host .= ($folder != '' AND strlen($folder) > 0) ? $folder : '';
     $res = $wpdb->query("
                UPDATE wp_options SET option_value = replace(option_value, '".$results[1]->option_value."', '".$host."') WHERE option_name = 'home' OR option_name = 'siteurl';
                UPDATE wp_posts SET guid = replace(guid, '".$results[1]->option_value."','".$host."');
                UPDATE wp_posts SET post_content = replace(post_content, '".$results[1]->option_value."', '".$host."');
                UPDATE wp_postmeta SET meta_value = replace(meta_value, '".$results[1]->option_value."', '".$host."');
                ");
  }
}
exit;
?>