ci = & get_instance();
$this->ci->load->config('recaptcha', TRUE);
if ($this->ci->config->item('recaptcha_secretkey', 'recaptcha') == NULL || $this->ci->config->item('recaptcha_secretkey', 'recaptcha') == "") {
die("To use reCAPTCHA you must get an API key from " . $this->signup_url . "");
}
if ($this->ci->config->item('recaptcha_sitekey', 'recaptcha') == NULL || $this->ci->config->item('recaptcha_sitekey', 'recaptcha') == "") {
die("To use reCAPTCHA you must get an API key from " . $this->signup_url . "");
}
$this->_secret = $this->ci->config->item('recaptcha_secretkey', 'recaptcha');
$this->_sitekey = $this->ci->config->item('recaptcha_sitekey', 'recaptcha');
if ($this->ci->config->item('lang', 'recaptcha') == NULL || $this->ci->config->item('lang', 'recaptcha') == "") {
$this->_lang = 'en';
} else {
$this->_lang = $this->ci->config->item('lang', 'recaptcha');
}
}
/**
* Function to convert an array into query string
* @param array $data Array of params
* @return String query string of parameters
*/
private function _encodeQS($data) {
$req = "";
foreach ($data as $key => $value) {
$req .= $key . '=' . urlencode(stripslashes($value)) . '&';
}
return substr($req, 0, strlen($req) - 1);
}
/**
* HTTP GET to communicate with reCAPTCHA server
* @param string $path URL to GET
* @param array $data Array of params
* @return string JSON response from reCAPTCHA server
*/
private function _submitHTTPGet($path, $data) {
$req = $this->_encodeQS($data);
$response = file_get_contents($path . $req);
return $response;
}
/**
* Function for rendering reCAPTCHA widget into views
* Call this function in your view
* @return string embedded HTML
*/
public function render() {
$return = '
';
return $return;
}
/**
* Function for verifying user's input
* @param string $response User's input
* @param string $remoteIp Remote IP you wish to send to reCAPTCHA, if NULL $this->input->ip_address() will be called
* @return array Array of response
*/
public function verifyResponse($response, $remoteIp = NULL) {
if ($response == null || strlen($response) == 0) {
// Empty user's input
$return = array(
'success' => FALSE,
'error_codes' => 'missing-input'
);
}
$getResponse = $this->_submitHttpGet(
$this->_siteVerifyUrl, array(
'secret' => $this->_secret,
'remoteip' => (!is_null($remoteIp)) ? $remoteIp : $this->ci->input->ip_address(),
'v' => $this->_version,
'response' => $response
)
);
$answers = json_decode($getResponse, TRUE);
if (trim($answers ['success']) == true) {
// Right captcha!
$return = array(
'success' => TRUE,
'error_codes' => ''
);
} else {
// Wrong captcha!
$return = array(
'success' => FALSE,
'error_codes' => $answers['error-codes']
);
}
return $return;
}
}