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CodeIgniter provides a comprehensive form validation and data prepping class that helps minimize the amount of code you will write.Validation is an important process while building web application.
Create a view file login.php and save the below code it in application/views/login.php. The login.php page will display form where user can submit his name and we will validate this page to ensure that it should not be empty while submitting.
<!DOCTYPE html>
<html>
<head>
<title>Login form</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<form method="post">
<div class="col-md-6">
<h3 class="text-center"><?php echo isset($errors['invalid']) ? $errors['invalid'] :''; ?></h3>
Enter Your Email<br/>
<div class="text-danger"><?php echo isset($errors['email'])?$errors['email']:''; ?></div>
<input type="text" name="email"class="form-control" />
<br/><br/>
Enter Your Password <br/>
<div class="text-danger"><?php echo isset($errors['pass'])?$errors['pass']:''; ?></div>
<input type="password" name="pass" class="form-control" />
<br/><br/>
<input type="submit" name="login" value="Login" class="form-control" />
</div>
</form>
</div>
</div>
</body>
</html>
Create a controller file User.php and save it in application/controller/User.php.
<?php
class User extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->library('form_validation');
}
public function login() {
$this->form_validation->set_rules('email', 'Email Id', 'trim|required|valid_email');
$this->form_validation->set_rules('pass', 'Password', 'trim|required');
$data['errors'] = array();
if ($this->form_validation->run() == FALSE) {
$error_messages = $this->form_validation->error_array();
$data['errors'] = $error_messages;
}
$this->load->view('login', $data);
}
}
?>
Let us execute this example by the following URL in the browser. This URL may be different based on your website.
https://howtowebcode.com/user/login
