Codeigniter validation errors are not displaying - php

Question

My codeigniter validation errors are not displaying someone can help?
my code is
public function addProduct(){
$this->load->view('header', $this->data);
$this->load->view('product/addProduct');
$this->load->view('footer');
$this->form_validation->set_rules('productName', 'Product Name', 'required|trim');
$this->form_validation->set_rules('productPrice', 'Product Price', 'required|trim');
if (!$this->form_validation->run() == FALSE)
{
// some stuff on validation success
}
else{
$this->load->view('product/addProduct');
}
}
and i have added
echo validation_errors(); in my view and action of the form is product/addProduct.

Answer 1

Try this it's work for you.
form_error() function return your form error.
$post_fields = $this->input->post();
$data['msg'] = '<ul>';
foreach ($post_fields as $k => $v) {
if (form_error($k))
$data['msg'] .= "<li>" . strip_tags(form_error($k)) . "</li>\n";
}
$data['msg'].='</ul>';
$this->load->view('product/addProduct',$data);
OR
echo validation_errors();//this function also return form error.

Answer 2

On view example
<?php echo validation_errors('<div class="error">', '</div>'); ?>
<!-- lower case for the controller name on form open -->
<?php echo form_open_multipart('product/addProduct');?>
<h5>productName</h5>
<input type="text" name="productName" value="<?php echo set_value('productName'); ?>" size="50" />
<h5>productPrice</h5>
<input type="text" name="productPrice" value="<?php echo set_value('productPrice'); ?>" size="50" />
<div><input type="submit" value="Submit" /></div>
<?php echo form_close();?>
Controller
Make sure your file name and class name is something like this below where first letter only upper case
Guide
Filename: Product.php
<?php
class Product extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->library('form_validation');
$this->load->helper('form');
$this->load->helper('url');
}
public function addProduct(){
// You can get data from here also
$this->data['some'] = 'Blah';
$this->form_validation->set_rules('productName', 'Product Name', 'required|trim');
$this->form_validation->set_rules('productPrice', 'Product Price', 'required|trim');
// remove your !
if ($this->form_validation->run() == FALSE){
// You can just display view in this area you do not have to load it multiple times
$this->load->view('header', $this->data);
$this->load->view('product/addProduct');
$this->load->view('footer');
} else {
// some stuff on validation success
}
}
}
Also check you have set your base url in config.php is required now in CI3 versions.