Codeigniter：退出问题

Question

I am not actually login in to the page.But when i click on the services on index page for more services , show logout button instead of login.Please provide solution for this issue.

Controller:

public function more_services($serviceid)
    {
        $data = $this->data;
        $this->load->helper(array('form','url'));
        $id=$this->session->userdata('id');
        $this->load->model('realpropertiesmodel');
        $data['service']=$this->realpropertiesmodel->getServicesbyID($serviceid);

        $this->smarty->view('service/service_viewdetails.tpl',$data);

    }
public function logout()
        {
            $this->session->sess_destroy();
            $data = $this->data;
            redirect("realestate/index" ,'refresh');

        }

In the view i add the following code:

[~if $id==''~] 
 [~include file="common/realestate_header.tpl"~]
 [~else~]
 [~include file="home/realestate_header.tpl"~]
 [~/if~] 

But i got the same error when add this much f code.Please provide solution for this issue

Answer 1

your id variable might be false so your check with "" might fail.

First solution:

Change the id variable as -1 if no login information is present:

$this->load->helper(array('form','url'));
$id= $this->session->userdata('id');
$id = ($id) ? $id : -1;
$this->load->model('realpropertiesmodel');

And then check for:

[~if $id!=-1~] 

Second solution

Directly check for false:

[~if $id==false~]