Codeigniter Form Validation: How to redirect to the previous page if found any validation error? - codeigniter

Question

I am using Codeigniter's validation class to validate my form. Could you please tell me how to redirect to the previous page from controller if found any validation error?
In my controller:
if ($this->form_validation->run() == FALSE){
//**** Here is where I need to redirect
} else {
// code to send data to model...
}

Answer 1

I extended the URL helper for this.
https://github.com/jonathanazulay/CodeIgniter-extensions/blob/master/MY_url_helper.php
In your controller:
$this->load->helper('url');
redirect_back();
Just put the MY_url_helper.php in application/helpers and you're good to go.

Answer 2

UPDATE
You want to post a form, validate it, then show the form again with the validation errors if validation fails, or show something entirely different if validation passes.
The best way to do this is to post a form back to itself. So the action of your form would be action="". This way, in your method, you can check to see if the form was submitted, and determine what to do there:
// in my form method
if ($this->input->post('submit')) // make sure your submit button has a value of submit
{
// the form was submitted, so validate it
if ($this->form_validation->run() == FALSE)
{
$this->load->view('myform');
}
else
{
$this->load->view('formsuccess');
}
}
else
{
// the form wasn't submitted, so we need to see the form
$this->load->view('myform');
}
OLD ANSWER
You can always pass the current URI in a hidden field in the form:
<input name="redirect" type="hidden" value="<?= $this->uri->uri_string() ?>" />
And then redirect if the validation fails:
redirect($this->input->post('redirect'));
Or you can set the redirect url in a flashdata session variable:
// in the method that displays the form
$this->session->set_flashdata('redirect', $this->uri->uri_string());
And then redirect if the validation fails:
redirect($this->session->flashdata('redirect'));

Answer 3

Well, usually you should do like this (pseudocode for now):
if form_validation == false --> the form is either not submitted yet or validation failed --> load the form view;
if form_validation == true --> do the processing.
This means you have to stay within the same controller. Your code should already be doing this behaviour, which is the intended one.
If you still feel the urge to redirect, call the appropriate function:
redirect('updatebatch/get/40','refresh');
// assuming 'updatebatch' is the name of your controller, and 'sundial' just a folder

Answer 4

I have created a function inside a library to create redirects when I need them.
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Functions {
public function generateRedirectURL()
{
$CI =& get_instance();
$preURL = parse_url($_SERVER['REQUEST_URI']);
$redirectUrl = array('redirectUrl' => 'http://' . $_SERVER['SERVER_NAME'] . $preURL['path']);
$CI->session->set_userdata($redirectUrl);
}
}
//End of the file
and when you want to create the redirect to that page, just write on the function:
$this->load->library('functions'); //you can put it in the autoloader config
$this->functions->generateRedirectURL();
Then you only need to call:
redirect($this->session->userdata['redirectUrl']);