Global MySQL query in Codeigniter - mysql

Question

In an attempt to try and narrow my query down, I'm still very new to Codeigniter framework...
I want to define global variables (eg. in autoloaded helpers) and use global mysql queries throughout my site - but I don't understand how to do the latter (global mysql queries).
I understand the concept of defining single variables in a helper... and I understand the concept of creating a single mysql query in a model, loading it in a controller and using it in a view file (with a foreach loop).
How (and where) do I create a mysql query that can be autoloaded (or whatever) and used anywhere on my site - without the need to load it in every controller?

Answer 1

this might help.. models would probably be your best bet. below i have given some insite on how to use controlelrs/models/libraries in general, i would put my mysql code into the appropriate model file. and call it via any controller
// Library/profiles.php
class My_library
{
protected $CI;
public function __construct()
{
$this->CI =& get_instance(); // Existing Code Igniter Instance
}
public function my_lib_method()
{
// Your Code Here
// can communicate back with CI by using $this->CI
// $this->CI->load->view(....);
// $this->CI->load->model(...);
// ETC
}
}
// models/my_model.php
class My_model extends CI_Model{
public function my_mdl_method(){
// Your Code Here
}
}
// controllers/my_controller.php
class My_controller extends CI_Controller
{
public function my_ctrl_method(){
$this->load->library('my_library');
$this->load->model('my_model');
// calling a library method
$this->my_library->my_lib_method();
// calling a model method
$this->my_model->my_mdl_method();
}
}