(1)
create table user_login
(
id int primary key auto_increment,
user_name varchar(200),
user_email varchar(200),
user_password varchar(200),
name varchar(200));
(2)write code for "login_database.php" save this into models folder:
<?php
Class Login_Database extends CI_Model
{
// Insert registration data in database
public function registration_insert($data)
{
$this->load->database();
// 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($sess_array) {
$condition = "user_name =" . "'" . $sess_array['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 $query->result();
} else {
return false;
}
}
}
?>
(3)wrtie code for "login_form.php" file & save this into views folder:
<html>
<head>
<title>Login Form</title>
<link rel="stylesheet" type="text/css" href="<?php echo base_url(); ?>css/style.css">
<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro|Open+Sans+Condensed:300|Raleway' rel='stylesheet' type='text/css'>
</head>
<body>
<?php
if (isset($logout_message)) {
echo "<div class='message'>";
echo $logout_message;
echo "</div>";
}
?>
<?php
if (isset($message_display)) {
echo "<div class='message'>";
echo $message_display;
echo "</div>";
}
?>
<div id="main">
<div id="login">
<h2>Login Form</h2>
<?php echo form_open('index.php/user_authentication/user_login_process'); ?>
<?php
echo "<div class='error_msg'>";
if (isset($error_message)) {
echo $error_message;
}
echo validation_errors();
echo "</div>";
?>
<label>UserName :</label>
<input type="text" name="username" id="name" placeholder="username"/>
<label>Password :</label>
<input type="password" name="password" id="password" placeholder="**********"/>
<input type="submit" value=" Login " name="submit"/>
<a href="user_registration_show">To SignUp Click Here</a>
<?php echo form_close(); ?>
</div>
</div>
</body>
</html>
(4)write code for "registration_form.php" file & save into views folder:
<html>
<head>
<title>Registration Form</title>
<link rel="stylesheet" type="text/css" href="<?php echo base_url(); ?>css/style.css">
<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro|Open+Sans+Condensed:300|Raleway' rel='stylesheet' type='text/css'>
</head>
<body>
<div id="main">
<div id="login">
<h2>Registration Form</h2>
<?php
echo "<div class='error_msg'>";
echo validation_errors();
echo "</div>";
echo form_open('index.php/user_authentication/new_user_registration');
echo form_label('Name : ');
echo form_input('name');
echo form_label('Create Username : ');
echo form_input('username');
echo "<div class='error_msg'>";
if (isset($message_display)) {
echo $message_display;
}
echo "</div>";
echo form_label('Email : ');
$data = array(
'type' => 'email',
'name' => 'email_value'
);
echo form_input($data);
echo form_label('Password : ');
echo form_password('password');
echo form_submit('submit', 'Sign Up');
echo form_close();
?>
</div>
</div>
</body>
</html>
(5)write code for "admin_page.php" file:
<html>
<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>" . $name . "</i> !</b>";
echo "Welcome to Admin Page";
echo "Your Username is " . $username;
echo "Your Email is " . $email;
echo "Your Password is " . $password;
?>
<b id="logout"><a href="logout">Logout</a></b>
</div>
</body>
</html>
(6)write code for user_authentication.php file & save it to controllers folder:
<?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();
$this->load->library('session');
$this->load->library('encrypt');
$this->load->helper('url');
// 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->database();
$this->load->model('login_database');
}
// Show login page
public function user_login_show() {
$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('name', 'Name', 'trim|required|xss_clean');
$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(
'name' => $this->input->post('name'),
'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) {
$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){
$sess_array = array(
'username' => $this->input->post('username')
);
// Add user data in session
$this->session->set_userdata('logged_in', $sess_array);
$result = $this->login_database->read_user_information($sess_array);
if($result != false){
$data = array(
'name' =>$result[0]->name,
'username' =>$result[0]->user_name,
'email' =>$result[0]->user_email,
'password' =>$result[0]->user_password
);
$this->load->view('admin_page', $data);
}
}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);
}
}
?>
NOTE:
Setting your Key
Your key can be either stored in your
application/config/config.php, or you can design your own
storage mechanism and pass the key dynamically when encoding/decoding.
To save your key to your
application/config/config.php, open the file and set:
$config['encryption_key'] = "YOUR KEY";
Message Length
It's important for you to know that the encoded messages the
encryption function generates will be approximately 2.6 times longer
than the original
message. For example, if you encrypt the string "my super secret data",
which is 21 characters in length, you'll end up
with an encoded string that is roughly 55 characters (we say "roughly"
because the encoded string length increments in
64 bit clusters, so it's not exactly linear). Keep this information in
mind when selecting your data storage mechanism. Cookies,
for example, can only hold 4K of information.
Initializing the Class
Like most other classes in CodeIgniter, the Encryption class is initialized in your controller using the
$this->load->library function:
$this->load->library('encrypt');
(7)to run type in browser:
http://localhost/ci/index.php/user_authentication/user_login_show
(8)css code for save it into root folder under css folder:
#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;
}
