Codeigniter自动加载会话不起作用

Question

the problem is this, when i login into the project, it creates the session, but when i try to acces the session from other controller, or even from the same controller, the session data doesn't existe, i have loaded session from autoload, and i also tried loading the session in the constructor, but the issue is still there. forgive for my english, this is not my native language, i hope you can help me please, thanks

Controller login function:

public function do_login(){
        $user = $this->input->post('usuario');
        $passwd = $this->input->post('clave');
        $data = $this->login_model->do_login($user,$passwd);

        if($data){
            $this->session->set_userdata("login",(array)$data); 
            //print_r($this->session->userdata());
            echo json_encode(array('status' => 1,'message'=>'Bienvenido','idPerfil'=> $data->idPerfil));
        }else
            echo json_encode(array('status' => 0,'message'=>'Usuario o contraseña incorrecto'));
    }

constructor
public function __construct(){
        parent::__construct();

        $this->load->model('login_model');
        $this->load->library('Mobile_Detect');
        //$this->load->model('cat_usuarios_model');
    //  $this->load->model('cat_sucursales_model');
    $this->load->library("session");

    }  

this is the autoload.php line

$autoload['libraries'] = array('session','database','form_validation','email');

Answer 1

Your problem is with configuration.

$config['sess_save_path'] = NULL

This is causing the failure.

If $config['sess_driver'] = 'files'; then $config['sess_save_path'] must be set to an absolute path to the folder where the files will be saved.

You can create a folder for the files. See the documentation for more information . Or, you can use the following.

$config['sess_save_path'] = sys_get_temp_dir();

It is probably better to create a specific folder to save session files than to use sys_get_temp_dir() . It is a tiny bit more work because setting permissions and ownership of the folder can be tricky if you just learning how to do those things.