Codeigniter 3 Routes and Handling 404 Errors - php

Question

I am trying to configure pretty URLs in codeigniter and it's not making much sense to me. I'd like my URLs to follow the following structure;
example.com/admin/view/form/123
I can successfully view data when I visit the URL above. I see the same data when I visit;
example.com/admin/view/123
Notice the 3rd segment /form/ is missing, but still returns the data. It's almost like it's ignoring this - I thought CI should throw a 404 error, or do I need to check for this manually? If so, how?
When I visit this URL;
example.com/admin/view
I see the following error;
An uncaught Exception was encountered
Type: ArgumentCountError
Message: Too few arguments to function Admin::view(), 0 passed
My code can be seen below;
Controller
defined('BASEPATH') OR exit('No direct script access allowed');
class Admin extends CI_Controller
{
public function __construct()
{
parent::__construct();
$this->load->helper('url');
$this->load->database();
$this->load->model('Admin_model');
}
public function index()
{
$this->load->view('template/header');
$data = array(
'title' => 'Admin Page'
);
$this->load->view('admin/index', $data);
$this->load->view('template/footer');
}
public function view($form_submission_id)
{
$this->load->view('template/header');
$data = array(
'title' => 'Form View Page',
'record' => $this->Admin_model->getSubmissionById($form_submission_id)
);
$this->load->view('admin/view/index', $data);
$this->load->view('template/footer');
}
}
Model
class Admin_model extends CI_Model {
public function getSubmissionById($form_submission_id) {
$this->db->select('*');
$this->db->from('submissions');
$this->db->where('id', $form_submission_id);
$query = $this->db->get();
return $query->row();
}
}
Routes
// redirect any urls that contain a number after /form
$route['admin/view/form/(:num)'] = "admin/view/$1";
My views folder structure looks like this;
- views
-- admin
- index.php
- view
-- index.php
Ideally I want my URLs to look like this, and throw 404 errors where they don't.
example.com/admin/view/form/123
example.com/admin/update/form/123
example.com/admin/delete/form/123

Answer 1

You can do this by several ways.
The fastest way is by creating routes like this:
$route['admin/view/form/(:num)'] = "Admin/view/$1";
When typing exemple.com/admin/view/form/9 , it will redirect to the controller admin, function view and the "9" will be the parameter $form_submission_id
The same thing for routes below.
$route['admin/update/form/(:num)'] = "Admin/update/$1";
$route['admin/delete/form/(:num)'] = "Admin/delete/$1";
of course you could create a function for each one, view, update, delete ... etc
It's normal that you see error when you enter example.com/admin/view because the view function take 1 parameter $form_submission_id