reCaptcha 集成：模型还是函数？

Question

我正在使用本教程将 reCaptcha 与我的项目集成。但是在我无法完全理解并写在下面的第四步我该怎么办？

Add the following function to your MY_Validation class as seen below in the libraries folder. (If you don’t already have one a MY_Validation class, make one.)

教程第四步下类似这样的代码。

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class MY_Validation 扩展 CI_Validation {

function MY_Validation()
{
    parent::CI_Validation();
}

function recaptcha_matches()
{
    $CI =& get_instance();
    $CI->config->load('recaptcha');
    $public_key = $CI->config->item('recaptcha_public_key');
    $private_key = $CI->config->item('recaptcha_private_key');
    $response_field = $CI->input->post('recaptcha_response_field');
    $challenge_field = $CI->input->post('recaptcha_challenge_field');
    $response = recaptcha_check_answer($private_key,
                                       $_SERVER['REMOTE_ADDR'],
                                       $challenge_field,
                                       $response_field);
    if ($response->is_valid)
    {
        return TRUE;
    }
    else 
    {
        $CI->validation->recaptcha_error = $response->error;
        $CI->validation->set_message('recaptcha_matches', 'The %s is incorrect. Please try again.');
        return FALSE;
    }
}

}

你能帮我解决这个问题吗？下面是教程link

教程link：https://ellislab.com/forums/viewthread/94299/

Answer 1

有很多简单的库可以用于重新验证

下载这个https://github.com/appleboy/CodeIgniter-reCAPTCHA

（顺便说一句，您的教程 link 不起作用）