Codeigniter User Registration and Login Script

Today we are going to learn about how to create simple user registration, login script with the session. Here I have created a simple users register,login, and logout module coding. For form validation,email validation,session validations i have used CodeIgniter validation libraries functions.

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Database

Create a new 'user_registration' table using the below code.

CREATE TABLE IF NOT EXISTS `user_registration` (
  `id` int(11) NOT NULL,
  `name` varchar(50) NOT NULL,
  `email` varchar(50) NOT NULL,
  `password` varchar(250) NOT NULL
)

Flow steps for user registration system.

Create a simple register and login HTML form layout. Load HTML page to your main or access controller.
To validating the form use CodeIgniter validation libraries. must you have to check unique email in the database.
After register, the user sends a new email to verify they email id.
Check your controller whether session values time to exit or not.

Controller(users.php)

Create a new controller object name called (users) load the below function to that controller.

<?php
class users extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        $this->load->helper(array('form', 'url'));
        $this->load->library('form_validation');
        $this->load->model('users_model','users'); 
        // users is users_model alias name        
    }

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

    public function login()
    {
        $this->form_validation->set_rules('email', 'email id ', 'trim|required');
        $this->form_validation->set_rules('password', 'password', 'trim|required');
        if ($this->form_validation->run() == FALSE):
            $this->load->view('signin_form');             
        else :
            $email     = $this->input->post('email');
            $password  = md5($this->input->post('password'));
            $log_users = $this->users->user_login($email,$password);
            if(is_object($log_users)) :
               $session_data=array('user_name'=>$log_users->name,

               'session_id'=>$log_users->id); 
               $this->session->set_userdata('user_session_info', $session_data);
               redirect(site_url('users/profile'));  
            else :
                $this->session->set_flashdata('error', 'Invalid username or password.');
                $this->load->view('signin_form');
            endif;            
        endif;
    }

    public function signup()
    {
        $this->form_validation->set_rules('username', 'Username', 'trim|required');
        $this->form_validation->set_rules('new_password', 'Password', 'trim|required');
        $this->form_validation->set_rules('passconf', 'Password Confirmation',
            'trim|required|matches[new_password]');
        $this->form_validation->set_rules('user_email', 'Email', 
            'required|is_unique[user_registration.email]');
        $this->form_validation->set_message('is_unique', 'The %s is already taken');

        if ($this->form_validation->run() == FALSE):
            $this->load->view('signin_form');             
        else :
            $data = array(
                'name'=>$this->input->post('username'),
                'email'=>$this->input->post('user_email'),
                'password'=>md5($this->input->post('new_password')),
            );
            $this->db->insert('user_registration',$data);
            unset($_POST);
            $this->session->set_flashdata('message', 'Successfully register.');
            redirect(site_url('users'));
        endif;
    }

    public function profile()
    {
        if($this->session->userdata['user_session_info']) :
            $session_info = $this->session->userdata['user_session_info'];
            $this->data['user_information'] = $this->users->get_user(

            $session_info['session_id']);
            $this->load->view('profile',$this->data);            
        else :
            $this->session->set_flashdata('error', 'Please login before access this page.');
            redirect(site_url('users'));
        endif;
    }

    public function logout()
    {
        $this->session->unset_userdata('user_session_info');
        redirect(site_url('users'));       

    }

}

$this->load->model('users_model','users') - load the users model users is a alias name of usersmodel
$this->session->set_userdata('user_session_info', $session_data) - user_session_info it's a session name we are storing user information to that session.
$this->session->set_flashdata - it will be store temporary session to that page.
$this->form_validation->set_rules - Validation rules either form value true or false checking conditions.

Models (users_model.php)

<?php
class Users_model extends CI_Model
{
    public function user_login($email,$password)
    {
        $sql = "SELECT * FROM user_registration 
                WHERE email='$email' AND password='$password' LIMIT 1 ";
        $result = $this->db->query($sql)->row();        
        return $result; 
    }

    public function get_user($id)
    {
        $sql = "SELECT * FROM user_registration WHERE id='$id' LIMIT 1 ";
        $result = $this->db->query($sql)->row();        
        return $result; 
    }  
}

View(signin_form.php)

<h3>Login form </h3>
<form method="post" action="<?php echo site_url('users/login') ?>">
  <h5>Email</h5>
  <input type="text" name="email" value="<?php echo set_value('email'); ?>" />
  <div class="errorMessage"><?php echo form_error('email'); ?></div>
  <h5>Password</h5>
  <input type="password" name="password" value="<?php echo set_value('password'); ?>" />
  <div class="errorMessage"><?php echo form_error('password'); ?></div>
  <input type="submit" class="btn btn-primary" value="Submit" />
</form>

<h3>New user regsirtation</h3>
<form method="post" action="<?php echo site_url('users/signup') ?>">
<h5>Name</h5>
<input type="text" name="username" value="<?php echo set_value('username'); ?>" />
<div class="errorMessage"><?php echo form_error('username'); ?></div>
<h5>Email Address</h5>
<input type="text"  name="user_email" value="<?php echo set_value('user_email'); ?>" />
<div class="errorMessage"><?php echo form_error('user_email'); ?></div>
<h5>Password</h5>
<input type="password" name="new_password" value="<?php echo set_value('new_password'); ?>"

 />
<div class="errorMessage"><?php echo form_error('new_password'); ?></div>
<h5>Password Confirm</h5>
<input type="password" name="passconf" value="<?php echo set_value('passconf'); ?>" />
<div class="errorMessage"><?php echo form_error('passconf'); ?></div>
<input type="submit" class="btn btn-primary" value="Submit" />
</form>

Session flashes message

<!-- Success Message -->
<?php if($this->session->flashdata('message')){?>
    <div class="success"> 
      <?php echo $this->session->flashdata('message')?>
    </div>
<?php } ?>
<!-- /Success Message -->
<!-- Error Message -->
<?php if($this->session->flashdata('error')){?>
  <div class="error">
    <?php echo $this->session->flashdata('error')?> 
  </div>
<?php } ?>
<!-- Error Message -->

profile.php

<h3><b> Welcome to profile page  </b></h3><br>
<p>Name : <?=$user_information->name; ?></p>
<p>Email : <?=$user_information->email; ?></p>
<p>Click here to <a href="<?=site_url('users/logout')?>">logout</a></p>

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25 July, 2016