场景：
我正在开发CMS系统，我想添加一些类别的对象（网页，帖子，媒体等）。在我看来，要保存一个新的类别，我使用HTML表单放置在Bootstrap模式，通过 AJAX 发送到我的控制器。在整个站点上启用CSRF保护。
在第一次发送数据时，我通过表单传递CSRF令牌名称和散列。一旦在控制器中被PHP代码处理，我想在响应中传递CSRF值，这样我就可以在模态中“重用”表单（例如：显示错误消息或/和创建另一个类别）。
然而，我无法访问get_csrf_token_name()和get_csrf_hash()方法来将值传递回视图。
在我的视图admin/category/create.php中：

...
<!-- CREATE CATEGORY MODAL MODAL -->
    <div class="modal" id="createCategory" tabindex="-1">
        <div class="modal-dialog modal-sm">
            <div class="modal-content">

                <div class="modal-header">
                    <h5 class="modal-title">Nová kategorie</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Zavřít"></button>
                </div>

                <div class="modal-body">  
                    <form action="" method="post" id="createCategoryForm">
                        <input type="hidden" value="<?= csrf_hash(); ?>" name="<?= csrf_token(); ?>" id="csrf">

                        <div class="form-group mb-3">
                            <label for="title" class="form-label">Název kategorie</label>
                            <input type="text" class="form-control" name="title" id="title" value="">
                        </div>   
                </div>

                <div class="modal-footer">
                        <button type="submit" class="btn btn-primary" id="createCategoryConfirm">Vytvořit novou kategorii</button>
                    </form>
                </div>

            </div>
        </div>
    </div>

...

<script>
    $('#head').on('click', '.create', function() {

        $('#createCategory').modal('show');
        $('#createCategoryForm').attr('action', '<?= base_url(); ?>/admin/category/create');

        $('#createCategoryConfirm').click(function(e) {            
            e.preventDefault();         
           
            var url = $('#createCategoryForm').attr('action');
            var csrfElement = $('#csrf');
            var csrfName = csrfElement.attr('name');
            var csrfHash = csrfElement.attr('value');
            var categoryTitle = $('input[name=title]').val();

            var data = {
                [csrfName]: csrfHash,
                'title': categoryTitle
            };
            
            console.log(data);

            $.ajax({
                type: 'ajax',
                method: 'POST',
                url: url,
                data: data,
                dataType: 'json',
                contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
                headers: {'X-Requested-With': 'XMLHttpRequest'},
                success: function(result) {
                    console.log(result); 

                },
                error: function(result) {
                    console.log(result); 
                },
            });
        });
    });
        
</script>

在我的控制器Category.php中：

<?php

namespace App\Controllers\Admin;

use App\Controllers\BaseController;
use App\Models\CategoryModel;
use CodeIgniter\I18n\Time;

class Category extends BaseController {

    protected $model;
    protected $validator;
    protected $security;

    public function __construct() { 
        $this->model = new CategoryModel();
        $this->validation =  \Config\Services::validation();
        $this->security =  \Config\Services::security();
        helper(['form', 'date', 'url']);
    }

...

    public function create() {
        $response = [];

        // This part of code returns error
        // 
        // $response['csrf'] = array(
        //     'name' => $this->security->get_csrf_token_name(),
        //     'hash' => $this->security->get_csrf_hash()
        // );

        $response['security'] = $this->security;
        
        if ($this->request->isAJAX()) {

            $newCategory = [
                'title' => $this->request->getVar('title'),
                'slug' => url_title($this->request->getVar('title')),
                'author' => session()->get('id'),
                'created_at' => Time::now('Europe/Prague')->toDateTimeString(),
                'updated_at' => Time::now('Europe/Prague')->toDateTimeString(),
                'parent' => '0'
            ];

            $this->validation->run($newCategory, 'categoryRules');

            if (!empty($this->validation->getErrors())) {
                $this->model->save($newCategory);   
                $response['errors'] = $this->validation->getErrors();
                echo json_encode($response);
            } else {
                $this->model->save($newCategory);   
                $response['success'] = 'New category was created';
                echo json_encode($response);

            }
        }          
    }

...

在浏览器控制台中， AJAX 响应是POST http://localhost/admin/category/create 500 (Internal Server Error)，并带有完整响应：

code: 500
file: "D:\Web\XAMPP\htdocs\lenka\app\Controllers\Admin\Category.php"
line: 38
message: "Call to undefined method CodeIgniter\Security\Security::get_csrf_token_name()"
title: "Error"

有没有人能看到这里的问题？在CI 4中如何重用CSRF令牌有什么好的解决方案吗？我尝试将CSRF regenerate的配置值设置为true和false，但没有效果。