Codeigniter. Controller cannot receive session data - codeigniter

Question

I set session successfully as output profiler show me session name and value.
But when I POST data controller cannot receive session data.
Library is loaded, $config['sess_expire_on_close'] = TRUE I've changed TRUE-FALSE without any success. Also tried rewrite code.
And another question I use two PC and on Linux machine I get error "Header already sent...", but on Win machine I don't receive this message. How to enable it on Win PC. Notices and warnings are enabled.
So ...
Controller kmgld:
function authorisation_user()
{
......
$data['set_cookie'] = "Surname";
......
$this->load->view('vheader', $data);
$this->load->view('vuser_kmgld');
$this->output->enable_profiler(TRUE); //show me only session name and value which I set
}
View:
if ($set_cookie!=NULL)
{
$this->session->set_userdata('surname',$set_cookie);
}
<!Doctype...>
<form action="<?php echo base_url()?>index.php/kmgld/update_kmgld" method="post" name="">
And again Controller kmgld
function update_kmgld()
{
...update DB
$test=$this->session->userdata('surname');
echo $test; //it is NULL
$this->output->enable_profiler(TRUE); // show me only now session id, ip, user agent
}

Answer 1

you have to set the userdata in the controller, the view isn't the proper place for it. so you probably would do something like this in your controller:
$surname = "Surname";
$this->session->set_userdata('surname',$surname);
$data['set_cookie'] = $surname;
...
$this->load->view('vheader', $data);
don't know if you autoload the session library. otherwise you have to load it in every function you need it.

Answer 2

remove session setting from view and do it in controller:
function authorisation_user()
{
$data['set_cookie'] = "Surname";
$this->session->set_userdata('surname',$set_cookie);
$this->load->view('vheader', $data);//are you sure here is where $data should go ?
$this->load->view('vuser_kmgld');//not $data here?
$this->output->enable_profiler(TRUE); //show me only session name and value which I set
}

Answer 3

Controller:
<?php
class Kmgld extends CI_Controller {
function index()
{
$data['flag'] = "first";
$this->load->model('Mkmgld');
$this->load->view('vheader');
$this->load->view('vauthorisation',$data);
$this->load->view('vfooter');
}
function get_kmgld()
{
$this->load->model('Mkmgld');
$this->Mkmgld->get_kmgld();
$this->load->view('vheader');
$this->load->view('kmgld');
$this->load->view('vfooter');
}
function authorisation_user()
{
$this->load->model('Mkmgld');
$surname_session = $this->session->userdata('surname');
$data['surname_post'] = mb_convert_case($this->input->post('surname'), MB_CASE_TITLE, "UTF-8");
$data['user_id'] = $this->Mkmgld->valid_user($data['surname_post']);
$surname = (isset($data['user_id'][0]->surname)? $data['user_id'][0]->surname: "");
if(isset($surname) and $surname !=NULL)
{
$data['query'] = $this->Mkmgld->get_kmgld($data['surname_post']);
$data['get_trip_target_id'] = $this->Mkmgld->get_trip_target_id();
$data['set_cookie'] = $data['surname_post'];
$this->session->sess_destroy();
$this->load->view('vheader', $data);
$this->load->view('vuser_kmgld');
$this->load->view('vfooter');
}else if (isset($surname_session) and $surname_session!= NULL)
{
//echo "you are in session";
$data['query'] = $this->Mkmgld->get_kmgld($surname_session);
$data['get_trip_target_id'] = $this->Mkmgld->get_trip_target_id();
$this->load->view('vheader', $data);
$this->load->view('vuser_kmgld');
$this->load->view('vfooter');
} else
{
$data['flag'] = "wrong";
$this->load->view('vheader');
$this->load->view('vauthorisation',$data);
$this->load->view('vfooter');
}
//echo "<pre>";
//var_dump($data);
$this->output->enable_profiler(TRUE);
}//end authorisation_user()
function update_kmgld()
{
$this->load->model('Mkmgld');
$data['get_trip_target_id'] = $this->Mkmgld->get_trip_target_id();
$trip_target_id = $data['get_trip_target_id'][0]->Auto_increment;
$this->Mkmgld->update_kmgld($this->input->post('day')
,$this->input->post('mon')
,$this->input->post('year')
,$this->input->post('spd_before')
,$this->input->post('spd_after')
,$this->input->post('total')
,$this->input->post('target')
,$this->input->post('approved')
,$this->input->post('user_id')
,$trip_target_id);
$a=$this->session->userdata('surname');
if ($a==NULL)
{
echo $a;
//redirect('kmgld/authorisation_user');
$this->output->enable_profiler(TRUE);
}
}
}//end class kmgld
?>
Model:
enter code here<?php
Class Mkmgld extends CI_Model {
function __construct()
{
parent::__construct();
}
function get_kmgld($surname){
$query = $this->db->query("SELECT
*
FROM `user`
INNER JOIN `user_has_trip`
ON `user`.`user_id` = `user_has_trip`.`user_id`
INNER JOIN `trip_target`
ON `user_has_trip`.`user_has_trip_id` = `trip_target`.`trip_target_id`
WHERE `user`.`surname` = '$surname'
");
return $query->result();
}
function valid_user($surname)
{
$user_id = $this->db->query("SELECT
*
FROM `user`
WHERE `user`.`surname`='$surname'
");
return $user_id->result();
}
function get_trip_target_id()
{
$get_trip_target_id = $this->db->query("SHOW TABLE STATUS LIKE 'trip_target'");
return $get_trip_target_id->result();
}
function update_kmgld($day, $mon, $year, $spd_before, $spd_after, $total, $target, $approved, $user_id, $trip_target_id)
{
$date = $year."-".$mon."-".$day;
$this->db->query("INSERT INTO `trip_target` (`trip_target_id`
,`date`
,`speedometer_before`
,`speedometer_after`
,`duration`
,`target`
,`approved`)
VALUES (NULL
,'$date'
,'$spd_before'
,'$spd_after'
,'$total'
,'$target'
,'$approved')
");
$this->db->query("INSERT INTO `user_has_trip`
(`user_has_trip_id`
,`user_id`
,`trip_target_id`
)
VALUES (NULL
,'$user_id'
,'$trip_target_id'
)
");
}
}//end class
?>
View vauthorisation:
<?php
$surname_value = $this->session->userdata('surname');
?>
<?php
if ($flag =="wrong")
{
echo "...Bad very bad. Try use another language ";
}
?>
html:
form method="post" action="authorisation_user"
input type="text" name="surname"
View vheader:
<?php
if ($set_cookie!=NULL)
{
$this->session->set_userdata('surname',$set_cookie);
echo "cookie set".$set_cookie;
}
?>
View vuser_kmgld:
html:
form action="update_kmgld"
inputs name=day, name=mon, name=year, name=spd_before...etc. After php code:
if (isset($user_id[0]->user_id))
{
foreach ($query as $row)
{
echo "<tr>
<td>".(isset($row->date)? date("d.m.Y", strtotime($row->date)): "")."</td>
<td>". (isset($row->speedometer_before)? $row->speedometer_before : "")."</td>
<td>". (isset($row->speedometer_after)? $row->speedometer_after : "")."</td>
<td>". (isset($row->duration)? $row->duration : "")."</td>
<td>". (isset($row->target)? $row->target : "")."</td>
<td>". (isset($row->aproved)? $row->aproved : "")."</td>
</tr>";
}
} //else redirect('kmgld/index');
?>