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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