Login form using codegnitor

// first call the following log() function in your controller 
eg :-
  function log()
        {	
		//$this->load->helper(array('url'));
		$this->load->view('login_view');
        }
 // this function call through the form after submit the login form 
  eg:
   
   function login_check()
		{
			$user_name = $this->input->post('user_name');
			$user_password = $this->input->post('user_password');
			$table = "login";
			$where=array('user_name'=>$user_name,'user_password'=>$user_password);
			$result = $this->Login->validate($table,$where);
			if($result!=0)
			{
				echo "success";
			}
			else if($result==0)
			{
				echo "failed";
			}
			
		}

 // After that  controller call the  login_view.php  view file in that file normal login form code as--
  eg:- 
  
   <h2 class="texzt-center"> <strong> Login Form </strong> </h2> <br>
		
		<form name="myform" action="login_check" method="post">
			<div class="row">
				<div class="form-group col-md-offset-2 col-md-8">
					<input type="text" class="form-control" name="user_name" id="uname" placeholder="User Name" style="input-placeholder:color:black;"/>
					   
			   </div>
			   </div>
			   <div class="row">
			   <div class="form-group col-md-offset-2 col-md-8">
					 
					<input type="text" class="form-control"  name="user_password" id="password" placeholder="Password"/>
					
			   </div>
			   </div>
			   
			   <div class="row">
				   <div class="form-group col-md-6">
						<input type="checkbox" name="remeber" /> <b>Remember Me </b>
						 
				   </div>
					<div class="form-group col-md-6">
						<a href="#"><b> Forgot Password  </b></a> 
						 
				   </div>
			   </div>
			   
			    <div class="row">
				   <div class="form-group col-md-12">
					 <button type="submit" class="btn btn-default" > <b>Submit </b></button>
						 
				   </div>
					 
			   </div>
			    
		</form>
    
    // after submit the button through the action path call the login_check() function which was call in above controller file.
    
    // In Login_check() function check the username and password and run the query and for validate username and passowrd in this function 
    I call the in login.php file which save in  models in that call the validate() function
    
    eg :- 
    
      <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Login extends CI_Model{
    function __construct(){
        parent::__construct();
    }
    
    public function validate($table,$where){
     
		$query = $this->db->get_where($table,$where);
			 //echo $this->db->last_query();      // echo query on browser
			if($query->num_rows()==1){
				
				foreach ($query->result() as $row)
				{
					$data = array(
					'id'=> $row->id,
					'user_name'=> $row->user_name,
					'user_passwrod'=> $row->user_passwrod,
					'logged_in'=>TRUE
					);
				}
				  
				$this->session->set_userdata($data);
				//print_r($data);
				return $query->result();
				
			}
			else
			{
				return '0';
			}
			
		}
}
?>
    //