# Models From Wikipedia: > The model manages the behavior and data of the application domain, > responds to requests for information about its state (usually from the view), > and responds to instructions to change state (usually from the controller). Creating a simple model: class Model_Post extends Model { public function do_stuff() { // This is where you do domain logic... } } If you want database access, have your model extend the Model_Database class: class Model_Post extends Model_Database { public function do_stuff() { // This is where you do domain logic... } public function get_stuff() { // Get stuff from the database: return $this->db->query(...); } } If you want CRUD/ORM capabilities, see the [ORM Module](../../guide/orm)