PHP Recaptcha::recaptcha_post示例

 function validate($text, $control, $form)
 {
     // note, $text will be null
     $chall = isset($_POST['recaptcha_challenge_field']) ? $_POST['recaptcha_challenge_field'] : false;
     $resp = isset($_POST['recaptcha_response_field']) ? $_POST['recaptcha_response_field'] : false;
     if (!$chall || !$resp) {
         $result = array('false', 'incorrect-captcha-sol');
     } else {
         $result = Recaptcha::recaptcha_post(array('privatekey' => $this->options['private_key'], 'remoteip' => $_SERVER['REMOTE_ADDR'], 'challenge' => $chall, 'response' => $resp));
     }
     // if the first part isn't true then return the second part
     return trim($result[0]) == 'true' ? array() : array('You did not complete the reCAPTCHA correctly (' . $result[1] . ')');
 }