function recaptcha_check_answer in reCAPTCHA 8

Same name and namespace in other branches

1. 5.2 recaptcha/recaptchalib.php \recaptcha_check_answer()
2. 6 recaptcha-php-1.11/recaptchalib.php \recaptcha_check_answer()
3. 7 recaptcha-php-1.11/recaptchalib.php \recaptcha_check_answer()

Calls an HTTP POST function to verify if the user's guess was correct

Parameters

string $privkey:

string $remoteip:

string $challenge:

string $response:

array $extra_params an array of extra variables to post to the server:

Return value

ReCaptchaResponse

2 calls to recaptcha_check_answer()

example-captcha.php in recaptcha-php-1.11/example-captcha.php

recaptcha_captcha_validation in ./recaptcha.module

CAPTCHA Callback; Validates the reCAPTCHA code.

File

recaptcha-php-1.11/recaptchalib.php, line 152

Code

function recaptcha_check_answer($privkey, $remoteip, $challenge, $response, $extra_params = array()) {
  if ($privkey == null || $privkey == '') {
    die("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
  }
  if ($remoteip == null || $remoteip == '') {
    die("For security reasons, you must pass the remote ip to reCAPTCHA");
  }

  //discard spam submissions
  if ($challenge == null || strlen($challenge) == 0 || $response == null || strlen($response) == 0) {
    $recaptcha_response = new ReCaptchaResponse();
    $recaptcha_response->is_valid = false;
    $recaptcha_response->error = 'incorrect-captcha-sol';
    return $recaptcha_response;
  }
  $response = _recaptcha_http_post(RECAPTCHA_VERIFY_SERVER, "/recaptcha/api/verify", array(
    'privatekey' => $privkey,
    'remoteip' => $remoteip,
    'challenge' => $challenge,
    'response' => $response,
  ) + $extra_params);
  $answers = explode("\n", $response[1]);
  $recaptcha_response = new ReCaptchaResponse();
  if (trim($answers[0]) == 'true') {
    $recaptcha_response->is_valid = true;
  }
  else {
    $recaptcha_response->is_valid = false;
    $recaptcha_response->error = $answers[1];
  }
  return $recaptcha_response;
}