代码点火器验证码未显示，验证码由守护程序生成

如何解决代码点火器验证码未显示，验证码由守护程序生成

我通过此链接学习如何制作验证码：https://www.codexworld.com/implement-captcha-codeigniter-captcha-helper/。 但是遇到了问题，我使用 sudoers（我的假设问题）启动了 xampp，我的验证码文件夹如下所示：

当我点击f12时，它说没有找到图像，但是当我检查时，文件在那里，但有权限问题，，，

我的权限问题：

我的代码和我复制的源代码完全一样，
控制器：

<?php defined('BASEPATH') OR exit('No direct script access allowed');
class Captcha extends CI_Controller
{
    function __construct() {
        parent::__construct();
        
        // Load session library
        $this->load->library('session');
        
        // Load the captcha helper
        $this->load->helper('url');
        $this->load->helper('captcha');
    }
    
    public function index(){
        // If captcha form is submitted
        if($this->input->post('submit')){
            $inputCaptcha = $this->input->post('captcha');
            $sessCaptcha = $this->session->userdata('captchaCode');
            if($inputCaptcha === $sessCaptcha){
                echo 'Captcha code matched.';
            }else{
                echo 'Captcha code does not match,please try again.';
            }
        }

        // Captcha configuration
        $config = array(
            'img_path'      => 'captcha_images/','img_url'       => base_url().'captcha_images/','font_path'     => 'system/fonts/texb.ttf','img_width'     => '160','img_height'    => 50,'word_length'   => 8,'font_size'     => 18
        );
        $captcha = create_captcha($config);
        
        // Unset previous captcha and set new captcha word
        $this->session->unset_userdata('captchaCode');
        $this->session->set_userdata('captchaCode',$captcha['word']);
        
        // Pass captcha image to view
        $data['captchaImg'] = $captcha['image'];
        
        // Load the view
        $this->load->view('captcha/index',$data);
    }
    
    public function refresh(){
        // Captcha configuration
        $config = array(
            'img_path'      => './captcha_images/',$captcha['word']);
        
        // Display captcha image
        echo $captcha['image'];
    }
}

查看：

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<!-- captcha refresh code -->
<script>
$(document).ready(function(){
    $('.refreshCaptcha').on('click',function(){
        $.get('<?php echo base_url().'captcha/refresh'; ?>',function(data){
            $('#captImg').html(data);
        });
    });
});
</script>

<h4>Submit Captcha Code</h4>
<p id="captImg"><?php echo $captchaImg; ?></p>
<p>Can't read the image? click <a href="javascript:void(0);" class="refreshCaptcha">here</a> to refresh.</p>
<form method="post">
    Enter the code : 
    <input type="text" name="captcha" value=""/>
    <input type="submit" name="submit" value="SUBMIT"/>
</form>