[eluser]ahmadalyan[/eluser]
ok i 'm trying to write my authentication library so i wrote this code
Code:
public function __construct()
{
//session_start();
// get codeigniter object to work with
$CI =& get_instance();
// load config file of the library
$this->auth_config = $CI->load->config('auth', TRUE);
}
function is_logged_in()
{
$CI =& get_instance();
if(isset($_SESSION["user_id"]) && isset($_SESSION["user_guid"]) && isset($_SESSION["user_email"]) && isset($_SESSION["ip_address"]) & isset($_SESSION["user_agent"]))
{
$user_id = $_SESSION["user_id"];
$user_guid = $_SESSION["user_guid"];
$ip_address = $_SESSION["ip_address"];
$user_agent = $_SESSION["user_agent"];
$CI->db->where($this->auth_config['user_id'],$user_id);
$CI->db->where($this->auth_config['user_guid'],$user_guid);
$CI->db->where($this->auth_config['user_agent'],$user_agent);
$CI->db->where($this->auth_config['ip_address'],$ip_address);
$query = $CI->db->get($this->auth_config['login_table'],1);
if($query->num_rows() !== 1)
{
/* there is a problem in the login information */
return false;
}
return true;
}
else
{
return $this->loggin_from_cookie();
}
}
function loggin_from_cookie()
{
// get Code igniter instance
$CI =& get_instance();
// read information from cookie
$user_id = $CI->input->cookie($this->auth_config['user_id']);
$user_guid = $CI->input->cookie($this->auth_config['user_guid']);
$user_agent = $CI->input->cookie($this->auth_config['user_agent']);
$last_login = $CI->input->cookie($this->auth_config['last_login']);
/* var_dump($_COOKIE);
echo $user_agent;
echo $user_guid;
exit()*/;
// build where segment of the SQL statment to check if login activity is exists or not
$CI->db->where($this->auth_config['user_id'],$user_id);
$CI->db->where($this->auth_config['user_guid'],$user_guid);
$CI->db->where($this->auth_config['user_agent'],$user_agent);
$CI->db->where($this->auth_config['last_login'],$last_login);
// get data
$query = $CI->db->get($this->auth_config['login_table'],1);
// check if there is any return ed data
if($query->num_rows() !== 1)
{
/* their username and password combination
* were not found in the databse */
return false;
}
else
{
// read variable from database
$row = $query->row_array();
$login_id = $row[$this->auth_config['login_id']];
$user_agent = $row[$this->auth_config['user_agent']];
$user_guid = $row[$this->auth_config['user_guid']];
$user_id = $row[$this->auth_config['user_id']];
// update database recored last login and ip address
$last_login = date("Y-m-d H-i-s");
$ip_address = $CI->input->ip_address();
// check if ip address is vaild
if(!$CI->input->valid_ip($ip_address))
{
return false;
}
// build array to update data
$data = array(
$this->auth_config['ip_address'] => $ip_address ,
$this->auth_config['last_login'] => $last_login
);
// where segment
$CI->db->where($this->auth_config['login_id'],$login_id);
// do update
$CI->db->update($this->auth_config['login_table'],$data);
// select segment
$CI->db->select($this->auth_config['user_name'],$auth_config['user_email']);
// where segment
$CI->db->where($this->auth_config['user_id'],$user_id);
//get data
$query = $CI->db->get($this->auth_config['user_table'],1);
if($query->num_rows() !== 1)
{
/* their username and password combination
* were not found in the databse */
return false;
}
// read variable
$row = $query->row_array();
$user_name = $row[$this->auth_config['user_name']];
$user_email = $row[$this->auth_config['user_email']];
//store user id in the session
$_SESSION["user_id"] = $user_id;
$_SESSION["user_name"] = $user_name;
$_SESSION["user_email"] = $user_email;
$_SESSION["ip_address"] = $ip_address;
$_SESSION["user_agent"] = $user_agent;
$_SESSION["last_login"] = $last_login;
$_SESSION["user_guid"] = $user_guid;
return true;
}
}
so this code test if the user is logged in or not using tow steps
1- test session variables if it has the session variable i will check if this variables are correct or not
2- if he hasn't session variables i will test if there is any cookie he is using to remember him in my website and do log in
