Codeigniter Validation form not working - php

Question

I know that this problem is in some other question, but I can't figure it out how to handle it properly in my case. I've been searching for a while, and I can't find the solution:
I want to do one form and connect with my database, but something goes wrong and it's impossible to receive the values on the database.
Here it's the view (location: /application/view/pages/home.php):
<?php echo validation_errors();?>
<div id="signup" style='position: absolute; left:900px; top: 380px;'>
<?php echo form_open('user/signup');?>
<input type='text' required="required" placeholder="Full Name" name="fullname"/><br/>
<input type='text' required="required" placeholder="Email" name="email"/><br/>
<input type='text' required="required" placeholder="Password" name="password"/><br/>
<input type='text' required="required" placeholder="Confirm password" name="confirmpassword"/><br/>
<button type="submit" name="submit_signup">Sign up</button>
<?php echo form_close(); ?>
Here the controller (location: /application/controllers/user.php):
class User extends CI_Controller {
public function __construct()
{
parent::__construct();
$this->load->model('User_model');
}
public index(){
$this->load->view('view');
}
public function signup(){
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
$this->load->model('User_model');
$user_id = DEFAULT;
$data = array(){
'user_id' => $user_id,
'email' => $this->input->post('email'),
'password' => $this->input->post('password'),
'full_name' => $this->input->post('fullname')
}
$this->User_model->add_user($data);
$this->index();
}
}
And the model (location: /application/models/user_model.php):
<?php
class User_model extends CI_Model {
public function __construct()
{
$this->load->database();
}
public function add_user($data){
$this->load->database();
$this->db->insert('user',$data);
}
}
?>

Answer 1

You have syntax error in your array:
It should be:
$data = array(
'user_id' => $user_id,
'email' => $this->input->post('email'),
'password' => $this->input->post('password'),
'full_name' => $this->input->post('fullname')
)
If still didn't work, your $user_id is probably an INT type, so just give it some INT.
And you are not doing any validation at all!?

Answer 2

Your Solution is here:
<?php
class Form extends CI_Controller {
public function index()
{
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
$this->form_validation->set_rules('username', 'Username', 'callback_username_check');
$this->form_validation->set_rules('password', 'Password', 'required');
$this->form_validation->set_rules('passconf', 'Password Confirmation', 'required');
$this->form_validation->set_rules('email', 'Email', 'required|is_unique[users.email]');
if ($this->form_validation->run() == FALSE)
{
$this->load->view('myform');
}
else
{
$this->load->view('formsuccess');
}
}
}?>