Login Form in CodeIgniter (without MySQL)

Here, we'll make a simple login page with the help of session.

Go to file autoload.php in application/config/autoload.php

Set session in library and helper.

Create controller page Login.php in application/controllers folder.

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

class Login extends CI_Controller {
	
	public function index()
	{
		$this->load->view('login_view');
	}
	public function process()
	{
		$user = $this->input->post('user');
		$pass = $this->input->post('pass');
		if ($user=='juhi' && $pass=='123') 
		{
			//declaring session
			$this->session->set_userdata(array('user'=>$user));
			$this->load->view('welcome_view');
		}
		else{
			$data['error'] = 'Your Account is Invalid';
			$this->load->view('login_view', $data);
		}
	}
	public function logout()
	{
		//removing session
		$this->session->unset_userdata('user');
		redirect("Login");
	}

}
?>

Look at the above snapshot, we have created a session for a single user with Username juhi and Password 123. For a valid login and logout we will use this username and password.

Create view page login_view.php in application/views folder.

<!DOCTYPE html>
<html>
<head>
	<title>Login Page</title>
</head>
<body>
	<?php echo isset($error) ? $error : ''; ?>
	<form method="post" action="<?php echo site_url('Login/process'); ?>">
		<table cellpadding="2" cellspacing="2">
			<tr>
				<td><th>Username:</th></td>
				<td><input type="text" name="user"></td>
			</tr>
			<tr>
				<td><th>Password:</th></td>
				<td><input type="password" name="pass"></td>
			</tr>

			<tr>
				<td> </td>
				<td><input type="submit" value="Login"></td>
			</tr>
		</table>
	</form>
</body>
</html>

Create view page welcome_view.php in application/views folder to show the successful login message.

<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<body>
	Welcome <?php echo $this->session->userdata('user'); ?>	
<br>
	<?php echo anchor('Login/logout', 'Logout'); ?>


</body>
</html>

Output

Type URL localhost/login/index.php/Login