Can't Display Form Errors in Codeigniter - php

Question

I am Creating a Blogging Application with Codeigniter. So therefor i have created admin panel for admin. But on my new article controller i cant display form errors. Here is my code.
Add Article and Store Article Controllers
public function add_article()
{
$this->load->model('dashboardmodel');
$username = $this->dashboardmodel->get_username();
$this->load->helper('form');
$this->load->view('admin/add_article', ['user'=>$username]);
}
public function store_article()
{
$this->load->library('form_validation');
$this->form_validation->set_error_delimiters('<div class="alert alert-dismissible alert-danger">', '</div>');
$this->form_validation->set_rules('title', 'Post Title', 'required|trim|alpha');
$this->form_validation->set_rules('body', 'Post Content', 'required');
if ($this->form_validation->run()) {
$title = $this->input->post('title');
$body = $this->input->post('body');
echo 'Successful';
} else {
return redirect('admin/add_article');
}
}
Add Article View
<?php
include_once('admin_header.php');
?>
<div class="container">
<fieldset>
<legend>New Post</legend>
//Here ERRORS SHOULD BE DISPLAYED
<?php echo validation_errors(); ?>
<?php echo form_open('admin/store_article', ['class'=>'form-horizontal']);
if ($error = $this->session->flashdata('login_failed')) : ?>
<div class="alert alert-dismissible alert-danger">
<?= $error ?>
</div>
<?php endif; ?>
<div class="form-group">
<div class="col-lg-10">
<?php echo form_input(['name'=>'title', 'class'=>'form-control', 'placeholder'=>'Post Title', 'value'=>set_value('title')]); ?>
</div>
</div>
<div class="form-group">
<div class="col-lg-10">
<?php echo form_textarea(['name'=>'body', 'class'=>'form-control', 'placeholder'=>'Post Content']); ?>
</div>
</div>
<div class="form-group">
<div class="col-lg-10">
<?php echo form_reset(['name'=>'reset', 'value'=>'Reset', 'class'=>'btn btn-default']),
form_Submit(['type'=>'submit', 'value'=>'Publish', 'class'=>'btn btn-primary']); ?>
</div>
</div>
</fieldset>
</form>
</div>
<?php
include_once('admin_footer.php');
?>
Dont What's Going On but i am Stuck in it.

Answer 1

Your problem is that when the form submission contains errors, you redirect to the page again, which refreshes the page and all errors are gone. What you need to do is replace your return redirect('admin/add_article'); line with actually loading the same view again, which would contain the errors this time. And since you load other things for the view, you'll have to replace it with this whole code (which is the same as the other method so maybe you should give the structure of this code more thought):
$this->load->model('dashboardmodel');
$username = $this->dashboardmodel->get_username();
$this->load->helper('form');
$this->load->view('admin/add_article', ['user'=>$username]);