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Login Form with session

Database Table: user-login

Now first create table user-login

CREATE TABLE IF NOT EXISTS `user_login` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_name` varchar(255) NOT NULL,
`user_email` varchar(255) NOT NULL,
`user_password` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
)

Controller: user_authentication.php

First you create a contorller class User_Authentication.

File name : User_Authentication.php

<?php

session_start(); //we need to start session in order to access it through CI

Class User_Authentication extends CI_Controller {

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

// Load form helper library
$this->load->helper('form');

// Load form validation library
$this->load->library('form_validation');

// Load session library
$this->load->library('session');

// Load database
$this->load->model('login_database');
}

// Show login page
public function index() {
$this->load->view('login_form');
}

// Show registration page
public function user_registration_show() {
$this->load->view('registration_form');
}

// Validate and store registration data in database
public function new_user_registration() {

// Check validation for user input in SignUp form
$this->form_validation->set_rules('username', 'Username', 'trim|required|xss_clean');
$this->form_validation->set_rules('email_value', 'Email', 'trim|required|xss_clean');
$this->form_validation->set_rules('password', 'Password', 'trim|required|xss_clean');
if ($this->form_validation->run() == FALSE) {
$this->load->view('registration_form');
} else {
$data = array(
'user_name' => $this->input->post('username'),
'user_email' => $this->input->post('email_value'),
'user_password' => $this->input->post('password')
);
$result = $this->login_database->registration_insert($data);
if ($result == TRUE) {
$data['message_display'] = 'Registration Successfully !';
$this->load->view('login_form', $data);
} else {
$data['message_display'] = 'Username already exist!';
$this->load->view('registration_form', $data);
}
}
}

// Check for user login process
public function user_login_process() {

$this->form_validation->set_rules('username', 'Username', 'trim|required|xss_clean');
$this->form_validation->set_rules('password', 'Password', 'trim|required|xss_clean');

if ($this->form_validation->run() == FALSE) {
if(isset($this->session->userdata['logged_in'])){
$this->load->view('admin_page');
}else{
$this->load->view('login_form');
}
} else {
$data = array(
'username' => $this->input->post('username'),
'password' => $this->input->post('password')
);
$result = $this->login_database->login($data);
if ($result == TRUE) {

$username = $this->input->post('username');
$result = $this->login_database->read_user_information($username);
if ($result != false) {
$session_data = array(
'username' => $result[0]->user_name,
'email' => $result[0]->user_email,
);
// Add user data in session
$this->session->set_userdata('logged_in', $session_data);
$this->load->view('admin_page');
}
} else {
$data = array(
'error_message' => 'Invalid Username or Password'
);
$this->load->view('login_form', $data);
}
}
}

// Logout from admin page
public function logout() {

// Removing session data
$sess_array = array(
'username' => ''
);
$this->session->unset_userdata('logged_in', $sess_array);
$data['message_display'] = 'Successfully Logout';
$this->load->view('login_form', $data);
}

}

?>

Views: login_form.php

File name : login_form.php

<html>
<?php
if (isset($this->session->userdata['logged_in'])) {

header("location: http://localhost/login/index.php/user_authentication/user_login_process");
}
?>
<head>
<title>Login Form</title>
<link rel="stylesheet" type="text/css" href="<?php echo base_url(); ?>css/style.css">
<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro|Open+Sans+Condensed:300|Raleway' rel='stylesheet' type='text/css'>
</head>
<body>
<?php
if (isset($logout_message)) {
echo "<div class='message'>";
echo $logout_message;
echo "</div>";
}
?>
<?php
if (isset($message_display)) {
echo "<div class='message'>";
echo $message_display;
echo "</div>";
}
?>
<div id="main">
<div id="login">
<h2>Login Form</h2>
<hr/>
<?php echo form_open('user_authentication/user_login_process'); ?>
<?php
echo "<div class='error_msg'>";
if (isset($error_message)) {
echo $error_message;
}
echo validation_errors();
echo "</div>";
?>
<label>UserName :</label>
<input type="text" name="username" id="name" placeholder="username"/><br /><br />
<label>Password :</label>
<input type="password" name="password" id="password" placeholder="**********"/><br/><br />
<input type="submit" value=" Login " name="submit"/><br />
<a href="<?php echo base_url() ?>index.php/user_authentication/user_registration_show">To SignUp Click Here</a>
<?php echo form_close(); ?>
</div>
</div>
</body>
</html>

Views: registration_form.php

<html>
<?php
if (isset($this->session->userdata['logged_in'])) {
header("location: http://localhost/login/index.php/user_authentication/user_login_process");
}
?>
<head>
<title>Registration Form</title>
<link rel="stylesheet" type="text/css" href="<?php echo base_url(); ?>css/style.css">
<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro|Open+Sans+Condensed:300|Raleway' rel='stylesheet' type='text/css'>
</head>
<body>
<div id="main">
<div id="login">
<h2>Registration Form</h2>
<hr/>
<?php
echo "<div class='error_msg'>";
echo validation_errors();
echo "</div>";
echo form_open('user_authentication/new_user_registration');

echo form_label('Create Username : ');
echo"<br/>";
echo form_input('username');
echo "<div class='error_msg'>";
if (isset($message_display)) {
echo $message_display;
}
echo "</div>";
echo"<br/>";
echo form_label('Email : ');
echo"<br/>";
$data = array(
'type' => 'email',
'name' => 'email_value'
);
echo form_input($data);
echo"<br/>";
echo"<br/>";
echo form_label('Password : ');
echo"<br/>";
echo form_password('password');
echo"<br/>";
echo"<br/>";
echo form_submit('submit', 'Sign Up');
echo form_close();
?>
<a href="<?php echo base_url() ?> ">For Login Click Here</a>
</div>
</div>
</body>
</html>

Views: admin_page.php

<html>
<?php
if (isset($this->session->userdata['logged_in'])) {
$username = ($this->session->userdata['logged_in']['username']);
$email = ($this->session->userdata['logged_in']['email']);
} else {
header("location: login");
}
?>
<head>
<title>Admin Page</title>
<link rel="stylesheet" type="text/css" href="<?php echo base_url(); ?>css/style.css">
<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro|Open+Sans+Condensed:300|Raleway' rel='stylesheet' type='text/css'>
</head>
<body>
<div id="profile">
<?php
echo "Hello <b id='welcome'><i>" . $username . "</i> !</b>";
echo "<br/>";
echo "<br/>";
echo "Welcome to Admin Page";
echo "<br/>";
echo "<br/>";
echo "Your Username is " . $username;
echo "<br/>";
echo "Your Email is " . $email;
echo "<br/>";
?>
<b id="logout"><a href="logout">Logout</a></b>
</div>
<br/>
</body>
</html>

,b>Models : login_database.php

<?php

Class Login_Database extends CI_Model {

// Insert registration data in database
public function registration_insert($data) {

// Query to check whether username already exist or not
$condition = "user_name =" . "'" . $data['user_name'] . "'";
$this->db->select('*');
$this->db->from('user_login');
$this->db->where($condition);
$this->db->limit(1);
$query = $this->db->get();
if ($query->num_rows() == 0) {

// Query to insert data in database
$this->db->insert('user_login', $data);
if ($this->db->affected_rows() > 0) {
return true;
}
} else {
return false;
}
}

// Read data using username and password
public function login($data) {

$condition = "user_name =" . "'" . $data['username'] . "' AND " . "user_password =" . "'" . $data['password'] . "'";
$this->db->select('*');
$this->db->from('user_login');
$this->db->where($condition);
$this->db->limit(1);
$query = $this->db->get();

if ($query->num_rows() == 1) {
return true;
} else {
return false;
}
}

// Read data from database to show data in admin page
public function read_user_information($username) {

$condition = "user_name =" . "'" . $username . "'";
$this->db->select('*');
$this->db->from('user_login');
$this->db->where($condition);
$this->db->limit(1);
$query = $this->db->get();

if ($query->num_rows() == 1) {
return $query->result();
} else {
return false;
}
}

}

?>

File name : style.css

#main{
width:960px;
margin:50px auto;
font-family:raleway;
}

span{
color:red;
}

h2{
background-color: #FEFFED;
text-align:center;
border-radius: 10px 10px 0 0;
margin: -10px -40px;
padding: 30px;
}

#login{

width:300px;
float: left;
border-radius: 10px;
font-family:raleway;
border: 2px solid #ccc;
padding: 10px 40px 25px;
margin-top: 70px;
}

input[type=text],input[type=password], input[type=email]{
width:99.5%;
padding: 10px;
margin-top: 8px;
border: 1px solid #ccc;
padding-left: 5px;
font-size: 16px;
font-family:raleway;
}

input[type=submit]{
width: 100%;
background-color:#FFBC00;
color: white;
border: 2px solid #FFCB00;
padding: 10px;
font-size:20px;
cursor:pointer;
border-radius: 5px;
margin-bottom: 15px;
}

#profile{
padding:50px;
border:1px dashed grey;
font-size:20px;
background-color:#DCE6F7;
}

#logout{
float:right;
padding:5px;
border:dashed 1px gray;
margin-top: -168px;
}

a{
text-decoration:none;
color: cornflowerblue;
}

i{
color: cornflowerblue;
}

.error_msg{
color:red;
font-size: 16px;
}

.message{
position: absolute;
font-weight: bold;
font-size: 28px;
color: #6495ED;
left: 262px;
width: 500px;
text-align: center;
}

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