Host path, HTTP path

$host_path = substr($_SERVER['SCRIPT_FILENAME'], 0, strlen($_SERVER['SCRIPT_FILENAME']) - strpos(strrev($_SERVER['SCRIPT_FILENAME']), "/"));
$http_path = "http://" . $_SERVER['HTTP_HOST'] . substr($_SERVER['PHP_SELF'], 0, strlen($_SERVER['PHP_SELF']) - strpos(strrev($_SERVER['PHP_SELF']), "/"));