McGansWebsite/admin/application/controllers/Welcome.php

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

class Welcome extends CI_Controller {
	
	public function __construct()
	{
		parent::__construct();
		$this->load->model('Common_model');
		$this->load->model('Project_model');
	}

	public function index()
	{
		$this->load->view('login');
	}
	
	public function dashboard()
	{
		
		$data['project']=$this->Project_model->totalProjects();
		$data['student']=$this->Project_model->totalStudents();
		$data['subject']=$this->Project_model->totalSubject();
		$data['faculty']=$this->Project_model->totalFaculties();
		$data['projectList']=$this->Project_model->recentlyAddedProject();
		$this->load->view('dashboard',$data);
	}
	
	public function login()
	{
	//echo "dsds";exit;
		$username=$this->input->post('username');
		$password=$this->input->post('password');
	 
		$check=$this->Common_model->get_login_detail($username,$password);
		//echo $this->db->last_query();exit;
		if($check->num_rows()>0)
		{
		 $ch	=$check->row();
		$this->session->set_userdata('username',$ch->username);
		$this->session->set_userdata('id',$ch->id);
		$this->session->set_userdata('suc',' Successfully Logged in..!');
		redirect('dashboard');
		
		}
		else
		{
		$this->session->set_userdata('err','The username or password is incorrect.');
		redirect('');
		}
		
	}
	public function logout()
	{
		$admin_id=$this->session->userdata('id');
		
        $data = array('id' => '', 'username' => '');
        $this->session->unset_userdata($data);
        $this->session->sess_destroy();
		redirect('');
	}
	
}