Zend Framework User Auth model

by Gabi Solomon

All of the applications this days will involve a database to store data and most of them will also have a user system. This means that beside building a login/register page you also need a method to store the data of the logged-in user while they are logged in.

Normally in php driven websites you will have that data storred in sessions, but in Zend Framework its easyer to use Zend_Auth to help you manage that part for you. The way i implemented my login is that i save the the user model in Zend_Auth storage, this helps me by having acces to the models methods like isAdmin for example.

Although this is so far pretty ok, i dont really like calling Zend_Auth to get the current user all the time, plus i would enjoy to have an empty user model returned if no user is logged in. This is why i wrote a small model that i named Users_Auth.

class Users_Auth
private $_user;

public function __construct()
$table = Users::instance();

if ($this->hasIndentity()) {
$this->_user = $this->getIdentity();
} else {
$this->_user = $table->fetchNew();

public function get() {
return $this->_user;

public function set(Users_Row $user) {
$this->_user = $user;

private function hasIndentity()
return ($this->getIdentity() !== null);

private function getIdentity()
return Zend_Auth::getInstance()->getIdentity();

* Singleton pattern
* @staticvar Users_Auth $instance
* @return Users_Auth
public function getInstance()
static $instance;
if (!($instance instanceof Users_Auth)) {
$instance = new Users_Auth();
return $instance;

The use is quite easy to understand, you just call Users_Auth::getInstance()->get(); to have the current logged user.

If you look in the construct you will see this line $this->_user->setTable($table); that is there because for some reason ( if you can figure it out pls tell me in the comment section ) after storing the model in Zend_Auth it looses connection with the model table.

That is it, not a very complicated post, just something that makes my coding just a little easyer.

  • http://stormwild.net stormwild

    I think your code trying to achieve something like what they are discussing in this article:

  • http://www.gsdesign.ro/ Gabi Solomon

    this is more specific to geting the user model from Zend_auth, and is not nearly as complex as that article

  • Anonymous

    are’t you creating a blank row by calling “fetchNew” ?