Crud Controller in CodeIgniter 3

 <?php

defined("BASEPATH") or exit("No direct script access allowed");

class Crud extends CI_Controller

{

    public function __construct()

    {

        parent::__construct();

        $this->load->model("Crud_model");

    }

    public function index()

    {

        $this->load->model("Crud_model");

        $data["product_details"] = $this->Crud_model->getAllProducts();

        $this->load->view("crud_view", $data);

    }

    public function addProduct()

    {

        $this->form_validation->set_rules("name", "Product Name", "trim|required");

        $this->form_validation->set_rules("price", "Product Price", "trim|required");

        $this->form_validation->set_rules("quantity", "Product Quantity", "trim|required");

        if ($this->form_validation->run() == false) {

            $data_error = [

                "error" => validation_errors()

            ];

            $this->session->set_flashdata($data_error);

        } else {

            $result = $this->Crud_model->insertProduct([

                "name" => $this->input->post("name"),

                "price" => $this->input->post("price"),

                "quantity" => $this->input->post("quantity")

            ]);

            if ($result) {

                $this->session->set_flashdata("inserted", "Your data has been successfully inserted!");

            }

        }

        redirect("Crud");

    }

    public function editProduct($id)

    {

        echo $id;

        $data["singleProduct"] = $this->Crud_model->getSingleProduct($id);

        $this->load->view("edit_view", $data);

    }

    public function update($id)

    {

        echo $id;

        $this->form_validation->set_rules("name", "Product Name", "trim|required");

        $this->form_validation->set_rules("price", "Product Price", "trim|required");

        $this->form_validation->set_rules("quantity", "Product Quantity", "trim|required");

        if ($this->form_validation->run() == false) {

            $data_error = [

                "error" => validation_errors()

            ];

            $this->session->set_flashdata($data_error);

        } else {

            $result = $this->Crud_model->updateProduct([

                "name" => $this->input->post("name"),

                "price" => $this->input->post("price"),

                "quantity" => $this->input->post("quantity")

            ], $id);

            if ($result) {

                $this->session->set_flashdata("updated", "Your data has been Successfully updated!");

            }

        }

        redirect("Crud");

    }

    public function deleteProduct($id)

    {

        echo $id;

        $result = $this->Crud_model->deleteItem($id);

        if ($result == true) {

            $this->session->set_flashdata("deleted", "Your data has been Successfully deleted!");

        }

        redirect("Crud");

    }

}