codeigniter form validation example

Example 1: codeigniter form_validation email

$this->form_validation->set_rules('email', 'Email', 'trim|required|valid_email');

Example 2: codeigniter load form_validation

<?php

class Form extends CI_Controller {

        public function index()
        {
                $this->load->helper(array('form', 'url'));

                $this->load->library('form_validation');

                if ($this->form_validation->run() == FALSE)
                {
                        $this->load->view('myform');
                }
                else
                {
                        $this->load->view('formsuccess');
                }
        }
}

Example 3: codeigniter validation text length

$this->form_validation->set_rules('ratingMessage', 'Review message', 'trim|max_length[255]|max_length[10]');

 $this->form_validation->set_message('max_length', 'Message you have entered for %s is too long please try again!');