Refreshing page null record automatically inserting in database - php

Question

I am using codeigniter MVC pattern . Whenever i am refreshing the page, Null record automatically inserting in database. In database, I set the all column as null except primary key.
Please help me.
View page code(index.php)
<div class="title">
<p><strong>ADD USER</strong></p>
</div>
<?php echo form_open("Welcome/index"); ?>
<input type="text" name="userId" placeholder="USER ID" style="width:500px">
<input type="date" name="date" style="width:500px">
<input type="text" name="firtsname" placeholder="FIRST NAME" style="width:330px">
<input type="text" name="middlename" placeholder="MIDDLE NAME" style="width:330px">
<input type="text" name="lastname" placeholder="LAST NAME" style="width:330px">
<input type="text" name="mobileno" placeholder="ENTER MOBILE NO." style="width:500px">
<input type="text" name="landline" placeholder="LANDLINE No." style="width:500px">
<textarea name="address" placeholder="ENTER ADDRESS"></textarea>
<input type="text" name="city" placeholder="CITY" style="width:500px">
<input type="text" name="locality" placeholder="LOCALITY" style="width:500px">
<input type="text" name="email" placeholder="ENTER EMAIL" style="width:1010px"></br>
<input type="submit" class="submit" name="SUBMIT">
<?php echo form_close(); ?>
</div>
Model page code(model_add_user.php)
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Model_add_user extends CI_Model {
public function __construct() {
parent:: __construct();
$this->load->database();
}
public function add_user() {
$data = array(
'userId' => $this->input->post('userId'),
'date' => $this->input->post('date'),
'firtsname' => $this->input->post('firtsname'),
'middlename' => $this->input->post('middlename'),
'lastname' => $this->input->post('lastname'),
'mobileno' => $this->input->post('mobileno'),
'landline' => $this->input->post('landline'),
'address' => $this->input->post('address'),
'city' => $this->input->post('city'),
'locality' => $this->input->post('locality'),
'email' => $this->input->post('email'),
);
$this->db->insert('add_user', $data);
}
}
?>
Controller page code(Welcome.php)
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Welcome extends CI_Controller {
/**
* Index Page for this controller.
*
* Maps to the following URL
* http://example.com/index.php/welcome
* - or -
* http://example.com/index.php/welcome/index
* - or -
* Since this controller is set as the default controller in
* config/routes.php, it's displayed at http://example.com/
*
* So any other public methods not prefixed with an underscore will
* map to /index.php/welcome/<method_name>
* #see http://codeigniter.com/user_guide/general/urls.html
*/
public function index()
{
//$this->load->view('welcome_message');
$this->load->view('index');
$this->load->model('model_add_user');
$this->model_add_user->add_user();
}
}
?>

Answer 1

In your controller make the following change :
public function index() {
if ($this->input->post()) {
$this->load->model('model_add_user');
$this->model_add_user->add_user();
}
$this->load->view('index');
}

Answer 2

Path up to controller name directly hit the index function of your controller. Here in your code you load view and call add_user function.So every time you refresh the page your model call and null insert into your database
You need to create a separate function for your insert data
public function index()
{
//$this->load->view('welcome_message');
$this->load->view('index');
}
function add_user()
{
$this->load->model('model_add_user');
$this->model_add_user->add_user();
}
And change form action to
<?php echo form_open("Welcome/add_user"); ?>

Answer 3

After successful insertion.. Just redirect it to... function / controller it will refresh the page and prevent the form submission again.
public function index() {
//$this->load->view('welcome_message');
$this->form_validation->set_rules('field', 'Field', 'trim|required');
if ($this->form_validation->run()) {
$this->load->model('model_add_user');
$this->model_add_user->add_user();
redirect('welcome')
} else {
$this->load->view('index');
}
}