如何生成驗證碼圖片？

Question

控制器在下面給出。如何在文件夾中生成驗證碼圖片。有人可以提供幫助嗎？這裏給出了圖像文件夾的路徑。但如何自動生成圖像？

function getCaptchImage(){ 
      $response['captcha'] = $this->generateCaptcha(); 

      echo json_encode($response); 
      exit; 
     } 



    function generateCaptcha() { 

     //Load Captcha helper 
     $this->load->helper('captcha'); 

      $vals = array(
       'word'  => 'Security Key words', 
       'img_path' => './uploads/captcha/', 
       'img_url' => base_url() . 'captcha/', 
       'img_width' => 200, 
       'img_height' => 50, 
       'expiration' => 7200, 
      ); 

      /* Generate the captcha */ 
      $captcha = create_captcha($vals); 

      /* Store the captcha value (or 'word') in a session to retrieve later */ 
      $this->session->set_userdata('captchaWord', $captcha['word']); 
      $this->session->set_userdata('captchaImage', $captcha['image']); 

      return $captcha['image']; 
     } 

Answer 1

嗨，你可以在下面的網址上找到所有關於該Captcha驗證碼輔助信息https://ellislab.com/codeigniter/user-guide/helpers/captcha_helper.html