How to pass data from controller to models in codeigniter - php

Question

I passed parameter from view to controller via URL. Now I want to send it from controller to model so that I can use it to pick data from tables. Here is my code:
controller:
function view(){
if(isset($_GET['r'])) {
$rank = $_GET['r'];
}
$rank=$this->uri->segment($rank);
$this->load->model('names_rank');
$data=$this->names_rank->get_names($rank);
print_r($rank);
}
model:
function get_names($rank){
$this->db->select('u.*,v.*');
$this->db->from('unit_member u, Vyeo v');
$this->db->where('v.fno = u.fno');
$this->db->where('u.present = ""');
$this->db->where('v.rank', $rank);
$this->db->where('v.date_of_end="0000-00-00"');
$query = $this->db->get();
return $query->result_array();
}
this is the result:
A PHP Error was encountered Severity: Warning Message: Missing
argument 1 for Names_rank::get_names(), called in
C:\xampp\htdocs\unit\application\controllers\names.php on line 32 and
defined

Answer 1

This will work to send to model but your code isn't understandable for me, you re-declare the variable after setting it in the IF? are you trying to print_r() the output from the model?
I think you are trying to achieve this maybe?
function view() {
if(isset($_GET['r'])) {
$rank = $_GET['r'];
}else{
$rank = $this->uri->segment($rank);
}
$this->load->model('names_rank');
$data = $this->names_rank->get_names($rank);
print_r($data);
}

Answer 2

You can pass a Parameter to your model. First you have to call your model within your controller if you not enable it on autoload.
Your Model:
<?php
class AwesomeModel extends CI_Model
{
publif function do_work($param, $anotherParam)
{
//code here
}
}
Then your controller:
<?php
class AwesomeController extends CI_Controller
{
public function __construct()
{
/*
* load in constructor so not need to recall every time you want use it
* second parameter is model renaming (optional)
*/
$this->load->model('AwesomeModel', 'awe');
}
public function pass_data()
{
$this->awe->do_work($param1, $param2);
}
?>
Thats all.