Login

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Login extends CI_Controller {


	public function index()
	{
		$this->load->view('vlogin');
	}

	public function tlogin(){
		$username = $this->input->post('username', true);
		$password = $this->input->post('password', true);
		$this->db->where('username',$username);
		$cek = $this->db->get('tuser');
		if($cek->num_rows()>0){
			$cek =	$cek->row_array();
			$pwdb = $cek['password'];
			if(password_verify($password,$pwdb)){
				$newdata = array(
					'nama'  => $cek['id_user'],
					'level' => $cek['level'],
					'logged_in' => TRUE
				);
				if($cek['level']=='Siswa'){
					$this->session->set_userdata($newdata);
					redirect('siswa/HalSiswa');
				}else{
					$this->session->set_userdata($newdata);
					redirect('Dashboard');
				}

			}
		}
		if($this->session->userdata('logged_in')!=TRUE) {
			redirect('Login');
		}
	}

	public function logout(){
		$this->session->sess_destroy();
		redirect('Login');
	}
}



file controller
Controller/siswa/HalSiswa
<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class HalSiswa extends CI_Controller {

    function __construct(){
        parent::__construct();
        if($this->session->userdata('logged_in')!=TRUE) {
			redirect('Login');
		}
        $this->load->model('siswa/modelSiswa');
    }

    public function index()
	{
        $data['judul'] = 'Data Siswa';
        $data['halaman'] = 'siswa/dashboardSiswa';
        $data['tampil'] = $this->db->get('tsiswa');
		$this->load->view('template',$data);
    }