hi guys ive came up with a way to have a hifi version and lofi version of your site with out having a sub domain with a copy of everything
this is simple and self explaining
try it and see how it works 
it was an idea to save on server space
this is simple and self explaining
PHP Code:
$site = ($_GET["site"]);
if($site=="lofi"){
echo "<a href=\"index.php\">Hifi Version</a><br/>";
}else{
echo "<a href=\"index.php?site=lofi\">Lofi Version</a><br/>";
}

it was an idea to save on server space