<?php 
class TestController extends AppController
{
  var $name = 'Test';
  var $components = array('Acl');
  var $uses = array('User');
  var $curLoggedInUserId = 3;

  function view()
  { 
    $aroAlias = 'User::'.$curLoggedInUserId;
    $acoAlias = 'User::5';

    if ($this->Acl->check($aroAlias, $acoAlias, 'read'))
    {
       echo 'Read access allowed for User Id'.$curLoggedInUserId;
    }
    else
    {
       echo 'Read access denied for User Id'.$curLoggedInUserId;
    }
  }
}
?>