Gazelle/sections/stats/index.php

<?php
#declare(strict_types=1);

enforce_login();

if (!isset($_REQUEST['action'])) {
    error(404);
} else {
    switch ($_REQUEST['action']) {
    case 'users':
      include SERVER_ROOT.'/sections/stats/users.php';
      break;

    case 'torrents':
      include SERVER_ROOT.'/sections/stats/torrents.php';
      break;
  }
}