function runkit_superglobals () {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // %          note 1: You must manually define the superglobals to be able to use them.
  // %          note 2: Another alternative (though you can't reflect on them with this function) is to use import_request_variables()
  // *     example 1: runkit_superglobals();
  // *     returns 1: []
  var superglobal = {},
    p = '',
    arr = [];
  var superglobals = ['$_GET', '$_POST', '$_REQUEST', '$_COOKIE', '$_SESSION', '$_SERVER', '$_ENV', '$_FILES'];
  for (var i = 0; i < superglobals.length; i++) {
    superglobal = this.window[superglobals[i]];
    for (p in superglobal) {
      arr.push(superglobal[p]);
    }
  }
  return arr;
}

runkit_superglobals();

[]