验证码不工作在php，聪明(Captcha not working in php , smarty)

 我正在尝试在我的网站上实现验证码，但它始终给出错误 - captcha-sol错误。 
 
 请看我的代码 
 
require_once('recaptchalib.php');
$publickey = "xxxxxxxxxxxxxx";
$privatekey = "xxxxxxxxxxxxxxxxxxxxxxxxx";

$resp = recaptcha_check_answer ($privatekey,$_SERVER["REMOTE_ADDR"],$_POST["recaptcha_challenge_field"],$_POST["recaptcha_response_field"]);
if ($resp->is_valid) {
            echo "You got it!";
    } else {

            echo "Error=". $resp->error;
    }
 
 请在这里查看这是一个Ajax电话 

I am trying to implement a captcha in my web site , but it is always giving an error incorrect-captcha-sol. 
 
Please see my code
 
require_once('recaptchalib.php');
$publickey = "xxxxxxxxxxxxxx";
$privatekey = "xxxxxxxxxxxxxxxxxxxxxxxxx";

$resp = recaptcha_check_answer ($privatekey,$_SERVER["REMOTE_ADDR"],$_POST["recaptcha_challenge_field"],$_POST["recaptcha_response_field"]);
if ($resp->is_valid) {
            echo "You got it!";
    } else {

            echo "Error=". $resp->error;
    }
 
Please check here It is an Ajax call

原文：https://stackoverflow.com/questions/16387150