integrate the simple CRUD and login system

application\controllers\home.php

<?php
class Home extends CI_Controller {
    public function index(){
        if($this->session->userdata('logged_in')){
            //Get the logged in users id
            $user_id = $this->session->userdata('user_id');
            //Get all lists from the model
             // $this->load->library('/controllers/person');    to load the library
              $data['person'] = $this->Person_model->list_all();
            //$data['lists'] = $this->List_model->get_all_lists($user_id);
          //  $data['tasks'] = $this->Task_model->get_users_tasks($user_id);
        }

        $data['main_content'] = 'home';
        $this->load->view('layouts/main',$data);
    }
}

application\controllers\person.php

<?php

class Person extends CI_Controller {

	// num of records per page
	private $limit = 10;

	function __construct()
	{
		parent::__construct();

		// load library
		$this->load->library(array('table','form_validation'));

		// load helper
		$this->load->helper('url');

		// load model
		$this->load->model('Person_model','',TRUE);
	}

	function index($offset = 0)
	{
		// offset
		$uri_segment = 3;
		$offset = $this->uri->segment($uri_segment);

		// load data
		$persons = $this->Person_model->get_paged_list($this->limit, $offset)->result();

		// generate pagination
		$this->load->library('pagination');
		$config['base_url'] = site_url('person/index/');
 		$config['total_rows'] = $this->Person_model->count_all();
 		$config['per_page'] = $this->limit;
		$config['uri_segment'] = $uri_segment;
		$this->pagination->initialize($config);
		$data['pagination'] = $this->pagination->create_links();

		// generate table data
		$this->load->library('table');
		$this->table->set_empty("&nbsp;");
		$this->table->set_heading('No', 'Name', 'Gender', 'Date of Birth (dd-mm-yyyy)', 'Actions');
		$i = 0 + $offset;
		foreach ($persons as $person)
		{
			$this->table->add_row(++$i, $person->name, strtoupper($person->gender)=='M'? 'Male':'Female', date('d-m-Y',strtotime($person->dob)),
				anchor('person/view/'.$person->id,'view',array('class'=>'view')).' '.
				anchor('person/update/'.$person->id,'update',array('class'=>'update')).' '.
				anchor('person/delete/'.$person->id,'delete',array('class'=>'delete','onclick'=>"return confirm('Are you sure want to delete this person?')"))
			);
		}
		$data['table'] = $this->table->generate();

		// load view
		$this->load->view('personList', $data);
	}
	
	function add()
	{
		// set empty default form field values
		$this->_set_fields();
		// set validation properties
		$this->_set_rules();
		
		// set common properties
		$data['title'] = 'Add new person';
		$data['message'] = '';
		$data['action'] = site_url('person/addPerson');
		$data['link_back'] = anchor('person/index/','Back to list of persons',array('class'=>'back'));
	
		// load view
		$this->load->view('personEdit', $data);
	}

	function addPerson()
	{
		// set common properties
		$data['title'] = 'Add new person';
		$data['action'] = site_url('person/addPerson');
		$data['link_back'] = anchor('person/index/','Back to list of persons',array('class'=>'back'));

		// set empty default form field values
		$this->_set_fields();
		// set validation properties
		$this->_set_rules();
		
		// run validation
		if ($this->form_validation->run() == FALSE)
		{
			$data['message'] = '';
		}
		else
		{
			// save data
			$person = array('name' => $this->input->post('name'),
							'gender' => $this->input->post('gender'),
							'dob' => date('Y-m-d', strtotime($this->input->post('dob'))));
			$id = $this->Person_model->save($person);
			
			// set user message
			$data['message'] = '<div class="success">add new person success</div>';
		}
		
		// load view
		$this->load->view('personEdit', $data);
	}
	
	function view($id)
	{
		// set common properties
		$data['title'] = 'Person Details';
		$data['link_back'] = anchor('person/index/','Back to list of persons',array('class'=>'back'));

		// get person details
		$data['person'] = $this->Person_model->get_by_id($id)->row();

		// load view
		$this->load->view('personView', $data);
	}
	
	function update($id)
	{
		// set validation properties
		$this->_set_rules();
		
		// prefill form values
		$person = $this->Person_model->get_by_id($id)->row();
		$this->form_data->id = $id;
		$this->form_data->name = $person->name;
		$this->form_data->gender = strtoupper($person->gender);
		$this->form_data->dob = date('d-m-Y',strtotime($person->dob));
		
		// set common properties
		$data['title'] = 'Update person';
		$data['message'] = '';
		$data['action'] = site_url('person/updatePerson');
		$data['link_back'] = anchor('person/index/','Back to list of persons',array('class'=>'back'));
	
		// load view
		$this->load->view('personEdit', $data);
	}
	
	function updatePerson()
	{
		// set common properties
		$data['title'] = 'Update person';
		$data['action'] = site_url('person/updatePerson');
		$data['link_back'] = anchor('person/index/','Back to list of persons',array('class'=>'back'));
		
		// set empty default form field values
		$this->_set_fields();
		// set validation properties
		$this->_set_rules();
		
		// run validation
		if ($this->form_validation->run() == FALSE)
		{
			$data['message'] = '';
		}
		else
		{
			// save data
			$id = $this->input->post('id');
			$person = array('name' => $this->input->post('name'),
							'gender' => $this->input->post('gender'),
							'dob' => date('Y-m-d', strtotime($this->input->post('dob'))));
			$this->Person_model->update($id,$person);
			
			// set user message
			$data['message'] = '<div class="success">update person success</div>';
		}

		// load view
		$this->load->view('personEdit', $data);
	}
	
	function delete($id)
	{
		// delete person
		$this->Person_model->delete($id);
		
		// redirect to person list page
		redirect('person/index/','refresh');
	}

	// set empty default form field values
	function _set_fields()
	{
		$this->form_data->id = '';
		$this->form_data->name = '';
		$this->form_data->gender = '';
		$this->form_data->dob = '';
	}
	
	// validation rules
	function _set_rules()
	{
		$this->form_validation->set_rules('name', 'Name', 'trim|required');
		$this->form_validation->set_rules('gender', 'Gender', 'trim|required');
		$this->form_validation->set_rules('dob', 'DoB', 'trim|required|callback_valid_date');
		
		$this->form_validation->set_message('required', '* required');
		$this->form_validation->set_message('isset', '* required');
		$this->form_validation->set_message('valid_date', 'date format is not valid. dd-mm-yyyy');
		$this->form_validation->set_error_delimiters('<p class="error">', '</p>');
	}

	// date_validation callback
	function valid_date($str)
	{
		//match the format of the date
		if (preg_match ("/^([0-9]{2})-([0-9]{2})-([0-9]{4})$/", $str, $parts))
		{
			//check weather the date is valid of not
			if(checkdate($parts[2],$parts[1],$parts[3]))
				return true;
			else
				return false;
		}
		else
			return false;
	}
}
?>

application\controllers\users.php

<?php
class Users extends CI_Controller{
    
    public function register(){
        if($this->session->userdata('logged_in')){
            redirect('home/index');
        }
        $this->form_validation->set_rules('first_name','First Name','trim|required|xss_clean');
        $this->form_validation->set_rules('last_name','Last Name','trim|required|xss_clean');
        $this->form_validation->set_rules('email','Email','trim|required|valid_email|xss_clean');
        
        $this->form_validation->set_rules('username','Username','trim|required|min_length[4]|xss_clean');      
        $this->form_validation->set_rules('password','Password','trim|required|min_length[4]|max_length[50]|xss_clean');
        $this->form_validation->set_rules('password2','Confirm Password','trim|required|matches[password]|xss_clean');
        
        if($this->form_validation->run() == FALSE){
            //Load view and layout
            $data['main_content'] = 'users/register';
            $this->load->view('layouts/main',$data);
        //Validation has ran and passed    
        } else {
           if($this->User_model->create_member()){
                $this->session->set_flashdata('registered', 'You are now registered, please log in');
                //Redirect to index page with error above
                redirect('home/index');
           }
        }
    }
    
    
    public function login(){
        $this->form_validation->set_rules('username','Username','trim|required|min_length[4]|xss_clean');      
        $this->form_validation->set_rules('password','Password','trim|required|min_length[4]|max_length[50]|xss_clean');        
        
        if($this->form_validation->run() == FALSE){
            //Set error
            $this->session->set_flashdata('login_failed', 'Sorry, the login info that you entered is invalid');
            redirect('home/index');
        } else {
           //Get from post
           $username = $this->input->post('username');
           $password = $this->input->post('password');
               
           //Get user id from model
           $user_id = $this->User_model->login_user($username,$password);
               
           //Validate user
           if($user_id){
               //Create array of user data
               $user_data = array(
                       'user_id'   => $user_id,
                       'username'  => $username,
                       'logged_in' => true
                );
                //Set session userdata
               $this->session->set_userdata($user_data);
                                  
               redirect('home/index');
            } else {
                //Set error
                $this->session->set_flashdata('login_failed', 'Sorry, the login info that you entered is invalid');
                redirect('home/index');
            }
        }
    }
    
    
    public function logout(){
        //Unset user data
        $this->session->unset_userdata('logged_in');
        $this->session->unset_userdata('user_id');
        $this->session->unset_userdata('username');
        $this->session->sess_destroy();
        
         //Set message
        $this->session->set_flashdata('logged_out', 'You have been logged out');
        redirect('home/index');
    }
    
    
}

application\models\person_model.php

<?php
class Person_model extends CI_Model {
	
   //private $tbl_person= 'tbl_person';

	function __construct(){
	   parent::__construct();
	}

	function list_all(){
		$this->db->order_by('id','asc');
		return $this->db->get('tbl_person');
	}
	
	function count_all(){
		return $this->db->count_all($this->tbl_person);
	}
	
	function get_paged_list($limit = 10, $offset = 0){
		$this->db->order_by('id','asc');
		return $this->db->get($this->tbl_person, $limit, $offset);
	}
	
	function get_by_id($id){
		$this->db->where('id', $id);
		return $this->db->get($this->tbl_person);
	}
	
	function save($person){
		$this->db->insert($this->tbl_person, $person);
		return $this->db->insert_id();
	}
	
	function update($id, $person){
		$this->db->where('id', $id);
		$this->db->update($this->tbl_person, $person);
	}
	
	function delete($id){
		$this->db->where('id', $id);
		$this->db->delete($this->tbl_person);
	}
}
?>

application\models\user_model.php

<?php
class User_model extends CI_Model{
     
    public function create_member(){
        $new_member_insert = array(
            'first_name'       => $this->input->post('first_name'),
            'last_name'        => $this->input->post('last_name'),
            'email'            => $this->input->post('email'),
            'username'         => $this->input->post('username'),                    
            'password'         => md5($this->input->post('password'))
        );
        
        $insert = $this->db->insert('users', $new_member_insert);
        return $insert;
    }
    
    
    public function login_user($username,$passowrd){
        //Secure password
        $enc_password = md5($passowrd);
        
        //Validate
        $this->db->where('username',$username);
        $this->db->where('password',$enc_password);
        
        $result = $this->db->get('users');
        if($result->num_rows() == 1){
            return $result->row(0)->id;
        } else {
            return false;
        }
    }
    
}

application\views\home.php

<!--Display Messages-->
<?php if($this->session->flashdata('registered')) : ?>
    <?php echo '<p class="text-success">' .$this->session->flashdata('registered') . '</p>'; ?>
<?php endif; ?>
<?php if($this->session->flashdata('logged_out')) : ?>
    <?php echo '<p class="text-success">' .$this->session->flashdata('logged_out') . '</p>'; ?>
<?php endif; ?>
<?php if($this->session->flashdata('need_login')) : ?>
    <?php echo '<p class="text-error">' .$this->session->flashdata('need_login') . '</p>'; ?>
<?php endif; ?>

<h1>Welcome to CI Test!</h1>
<p>CI Test </p>
<?php if($this->session->userdata('logged_in')) : ?>
<br />
<!--Display Errors-->
//<?php $this->load->view('person'); ?>   //line 17

application\views\layouts\main.php

<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<a href="index.php"><title>login CRUD</title></a>
<link href="<?php echo base_url(); ?>assets/css/bootstrap.css" rel="stylesheet">
<link href="<?php echo base_url(); ?>assets/css/custom.css" rel="stylesheet">
<link href="<?php echo base_url(); ?>res/css/style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
</head>
<body>
 <div class="container">
 <div class="container navbar navbar-fixed-top span11">
      <div class="navbar-inner navbar-ct-blue">
        <div class="container-fluid">
          <a class="brand" href="#"></a>
          <div class="nav-collapse collapse">
            <p class="navbar-text pull-right">
             <!--RIGHT TOP CONTENT-->
             <?php if($this->session->userdata('logged_in')) : ?>
               Welcome,&nbsp <font style="text-transform: uppercase;" color="white"><strong><?php echo $this->session->userdata('username'); ?></strong></font>
             <?php else : ?>
                <a href="<?php echo base_url(); ?>users/register">Register</a>
             <?php endif; ?>
            </p>
            <ul class="nav nav-pills">
              <li class="active"><a href="<?php echo base_url(); ?>"><i class="icon-home icon-white"></i>Home</a></li>
               <?php if($this->session->userdata('logged_in')) : ?>
                    <li><a href="<?php echo base_url(); ?>lists">My List</a></li>
               <?php endif; ?>
            </ul>
          </div><!--/.nav-collapse -->
        </div>
      </div>
    </div>

    <div class="container-fluid span11">
      <div class="row-fluid">
        <div class="span3">
          <div class="well sidebar-nav">
          <div style="margin:0 0 10px 10px;">
			<!--SIDEBAR CONTENT-->
			<?php $this->load->view('users/login'); ?>
          </div>
          </div><!--/.well -->
        </div><!--/span-->

        <div class="span9">
   		<!--MAIN CONTENT-->
			<?php $this->load->view($main_content); ?>
        </div><!--/span-->
		</div><!--/row-->
      <hr>

      <footer>
        <p>By Psionics</p>
      </footer>
    </div><!--/.fluid-container-->

</div><!--/.container-->
</body>
</html>

application\views\personList.php

	<div class="content">
		<h1>Simple CRUD Application</h1>
		<div class="paging"><?php echo $pagination; ?></div>
		<div class="data"><?php echo $table; ?></div>
		<br />
		<?php echo anchor('person/add/','add new data',array('class'=>'add')); ?>
	</div>

application\views\users\login.php

<?php if($this->session->userdata('logged_in')) : ?>
    <p>You are logged in as <?php echo $this->session->userdata('username'); ?></p>
    <!--Start Form-->
    <?php $attributes = array('id' => 'logout_form',
                          'class' => 'form-horizontal'); ?>
    <?php echo form_open('users/logout',$attributes); ?>
         <!--Submit Buttons-->
    <?php $data = array("value" => "Logout",
                    "name" => "submit",
                    "class" => "btn btn-primary"); ?>
    <?php echo form_submit($data); ?>
    <?php echo form_close(); ?>
<?php else : ?>
    <h3>Login Form</h3>

<?php if($this->session->flashdata('login_failed')) : ?>
    <?php echo '<p class="text-error">' .$this->session->flashdata('login_failed') . '</p>'; ?>
<?php endif; ?>

<!--Start Form-->
<?php $attributes = array('id' => 'login_form',
                          'class' => 'form-horizontal'); ?>
<?php echo form_open('users/login',$attributes); ?>

<!--Field: Username-->
<p>
<?php echo form_label('Username:'); ?>
<?php
$data = array(
              'name'        => 'username',
              'placeholder' => 'Enter Username', 
              'style'       => 'width:90%',
              'value'       => set_value('username')
            );
?>
<?php echo form_input($data); ?>
</p>

<!--Field: Password-->
<p>
<?php echo form_label('Password:'); ?>
<?php
$data = array(
              'name'        => 'password',
              'placeholder' => 'Enter Password',
              'style'       => 'width:70%',
              'value'       => set_value('password')
            );
?>
<?php echo form_password($data); ?>
</p>
<br />
<p>
    <!--Submit Buttons-->
    <?php $data = array("value" => "Login",
                    "name" => "submit",
                    "class" => "btn btn-primary"); ?>
    <?php echo form_submit($data); ?>
</p>
<?php echo form_close(); ?>
<?php endif; ?>

application\views\users\register.php

<h1>Register</h1>
<p>Please fill out the form below to create an account</p>
<!--Display Errors-->
<?php echo validation_errors('<p class="text-error">'); ?>
 <?php echo form_open('users/register'); ?>
<!--Field: First Name-->
<p>
<?php echo form_label('First Name:'); ?>
<?php
$data = array(
              'name'        => 'first_name',
              'value'       => set_value('first_name')
            );
?>
<?php echo form_input($data); ?>
</p>
<!--Field: Last Name-->
<p>
<?php echo form_label('Last Name:'); ?>
<?php
$data = array(
              'name'        => 'last_name',
              'value'       => set_value('last_name')
            );
?>
<?php echo form_input($data); ?>
</p>

<!--Field: Email Address-->
<p>
<?php echo form_label('Email Address:'); ?>
<?php
$data = array(
              'name'        => 'email',
              'value'       => set_value('email')
            );
?>
<?php echo form_input($data); ?>
</p>

<!--Field: Username-->
<p>
<?php echo form_label('Username:'); ?>
<?php
$data = array(
              'name'        => 'username',
              'value'       => set_value('username')
            );
?>
<?php echo form_input($data); ?>
</p>

<!--Field: Password-->
<p>
<?php echo form_label('Password:'); ?>
<?php
$data = array(
              'name'        => 'password',
              'value'       => set_value('password')
            );
?>
<?php echo form_password($data); ?>
</p>

<!--Field: Password2-->
<p>
<?php echo form_label('Confirm Password:'); ?>
<?php
$data = array(
              'name'        => 'password2',
              'value'       => set_value('password2')
            );
?>
<?php echo form_password($data); ?>
</p>

<!--Submit Buttons-->
<?php $data = array("value" => "Register",
                    "name" => "submit",
                    "class" => "btn btn-primary"); ?>
<p>
    <?php echo form_submit($data); ?>
</p>
<?php echo form_close(); ?>