The CSRF helper is used to protect post request from cross site request forgeries. For more information on CSRF seehttps://www.owasp.org/index.php/Cross-Site_Request_Forgery_%28CSRF%29_Prevention_Cheat_Sheet

To use place at the top of controller like:

namespace Controllers;
use Core\Controller;
use Helpers\Csrf;
use Helpers\Session;
class Pet extends Controller
{ private $model; public function __construct() { parent::__construct(); $this->model = new \\Models\\PetModel(); }

In your add or edit method create the token. If you use separate methods to open an edit view and a different method to update, create it in the edit method like:

function edit()
{ $id = $_GET['id']; // or $id = filter_input(INPUT_GET, 'id'); //suggested way.... $data['csrf_token'] = Csrf::makeToken(); $data['row'] = $this->model->getPet($id); $this->view->renderTemplate('header', $data); $this->view->render('pet/edit', $data, $error); $this->view->renderTemplate('footer', $data);

Before the submit button in same view, place this hidden field:

<input type="hidden" name="token" value="<?php echo $data['csrf_token']; ?>" />

In the controller and at the top of the method that processes the form, update here is only an example, place:

function update()
{ if (isset($_POST['submit'])) { // or the name/value you assign to button. if (!Csrf::isTokenValid()) { Url::redirect('admin/login'); // Or to a url you choose....... } $id = $_POST['id']; $petname = $_POST['petname']; // other processing code