codeigniter session is not working - php

Question

I'm using codeigniter
i want to show some data taken form a database by querying as following.
$this->db->where('sex !=', $iam);
$this->db->where('sex', $searching_for);
$this->db->where('Age >=' , $age_from);
$this->db->where('Age <=' , $age_to);
if($Province != 1){
$this->db->where('Province' , $Province);
}
$this->db->limit($limit, $start);
$query = $this->db->get("members");
return $query->result_array();
The $iam,$searching_for, $age, $age_to is provided by user and I'm passing them from conttroller file using session array.
$search_info=array(
'iam' => $this->input->post('iam'),
'searching_for' => $this->input->post('searching_for'),
'age_from' => $this->input->post('age_from'),
'age_to' => $this->input->post('age_to'),
'country' => $this->input->post('country'),
'Province' => $this->input->post('Province')
);
$this->session->set_userdata(array("search_info" => $search_info));
and my pagination function is also in controller file and it is like this
public function pagination(){
$this->load->library("pagination");
$config = array();
$config["base_url"] = base_url() . "controller_search/index";
$this->load->model('models_search');
$config["total_rows"] = $this->models_search->search();
$config["per_page"] = 1;
$config["uri_segment"] = 3;
$this->pagination->initialize($config);
//$page = ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;3
//echo $this->uri->segment(3);
//echo ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;3;
$page = $this->uri->segment(3);
$data["search_result"] = $this->models_search->fetch_categories($config["per_page"], $page);
$data["links"] = $this->pagination->create_links();
$data['error'] = '';
$this->load->view('home_header.php');
$this->load->view('search/search_result',$data);
}
But the thing is when i click the page numbers it didn't show any thing, i tried commenting all the where clues in the query and then it works.So i think the error is in session array and i tried to var_dump the session_all so then it shows array(0){}
Can anyone help me in this case ?

Answer 1

Use this code:
$this->session->set_userdata("search_info" => $search_info);
code to set session

Answer 2

Set your session data by this code:
$this->session->set_userdata("sess_data", "mydata");
Retrive this session data by this code:
$this->session->userdata("sess_data");

Answer 3

I think you are accessing session array wrong way.
Instead of
$iam
use
$this->session->userdata('iam');
Or
$this->session->userdata('$iam');
Whichever works in your case....

Answer 4

I just took all the posted values to variables in index function and then i put them in to session array as
$search_info=array(
'iam' => $iam,
'searching_for' => $searching_for,
'age_from' => $age_from,
'age_to' => $age_to,
'country' => $country,
'Province' => $Province
);
$this->session->set_userdata(array("search_info" => $search_info));
then i redirect it to pagination function. then it works neatly. before it was overwrite the post items and the session array when i moving towards pages. now because of the redirect it was stoped. as i think. any way it is working now very well
than you every one for helping me.
specially Mr.John Blake thank you very much sir.

Answer 5

check if you have load the session library.If not either load in your controller as
$this->load->library('session')
or you may auto load session in library of config/autoload.php