如何在Codeigniter中从数据库设置会话用户数据？

Question

I have problem with my session login in codeigniter 3. I can't get data from database to insert session. Whats wrong with my code?

My Controller

function __construct(){
    parent::__construct();      
    $this->load->model('m_login');
}

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

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
        'password' => md5($password)
        );
    $cek = $this->m_login->cek_login("admin",$where)->num_rows();
    if($cek > 0){
        $data_session = array(
            'username' => $cek['username'],
            'nama'     => $cek['nama']
            'status'   => "login"
            );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}
}

My Model

<?php 
class M_login extends CI_Model{ 
function cek_login($table,$where){      
    return $this->db->get_where($table,$where);
    }   
}

Answer 1

 Try This 
if($cek > 0){
   $cek = $cek->row_array();
    $data_session = array(
        'username' => $cek['username'],
        'nama'     => $cek['nama']
        'status'   => "login"
        );
    $this->session->set_userdata($data_session);
    redirect(base_url("admin"));
}else{
    echo "Username dan password salah !";
}

Answer 2

Try like this...

In codeigniter row_array() takes the first matched row in array format.So your function aksi_login() must be like this...

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
        'password' => md5($password)
        );
    $result = $this->m_login->cek_login("admin",$where);
    $cek = $this->m_login->cek_login("admin",$where)->num_rows();
    if($cek > 0){
        $cek = $result->row_array();//no your records are in array format having matched row
        $data_session = array(
            'username' => $cek['username'],
            'nama'     => $cek['nama']
            'status'   => "login"
            );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}

For more refer here.. https://www.codeigniter.com/userguide3/database/results.html

Answer 3

1.m_login->cek_login
this functions returns a SQL QUERY OBJECT
2.the SQL QUERY OBJECT ->num_rows() function returns a INT ($cek)
3.so $cek is a INT . so u cant use like an array ($cek['username'])

so Please try this code

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
       'password' => md5($password)
    );
   $cek = $this->m_login->cek_login("admin",$where);//$cek is a Query Object
   $rows = $cek->num_rows();//$rows is a INT
   if($rows > 0){
        $cek = $cek->row_array();//now u get an Array
        $data_session = array(
           'username' => $cek['username'],
           'nama'     => $cek['nama']
           'status'   => "login"
           );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}