Help with User Registration Function?

[eluser]Buso[/eluser]
The documentation is pretty clear and straight forward =S

A model is nothing but a class that extends Model, located at /models, and loaded from within your controller by $this->load->model('some_model');

Then, you can use it like $this->some_model->some_method();

The documentation has working examples http://userguide/general/models.html

To check a user against the db, you can do something like this (inside the model! always):

Code:

$query = $this->db->where('user',$data['user'])
  ->where('password',$data['password'])->get('users',1);
// Note that you should encrypt the passwords, this isn't safe

if($query->num_rows()<1) {
  //the user doens't exist
  return FALSE;
}

// the user exist

// save data to a session, etc

return TRUE; // you could also return the user data instead if needed

You could also check a full working auth system like this: http://ellislab.com/forums/viewthread/145263/

Maybe it can save you some hours of work, but if you don't know how to use models yet I would concentrate on that.