error(self::MISSING_VALUE);
return false;
}
if (empty($value[$this->_RESPONSE])) {
$this->error(self::MISSING_VALUE);
return false;
}
if (! extension_loaded('curl')) {
$this->error('reCAPTCHA 2 requires the PHP CURL extension');
return false;
}
// Google request was cached
if (in_array($value[$this->_RESPONSE], $_SESSION['recaptcha_cache'])) {
return true;
}
//set POST variables
$url = 'https://www.google.com/recaptcha/api/siteverify';
$fields = [
'secret' => urlencode($this->getPrivkey()),
'response' => urlencode($value[$this->_RESPONSE]),
'remoteip' => urlencode($_SERVER['REMOTE_ADDR']),
];
$fields_string = '';
foreach ($fields as $k => $v) {
$fields_string .= $k . '=' . $v . '&';
}
rtrim($fields_string, '&');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = @json_decode(curl_exec($ch), true);
if (! is_array($result)) {
$this->error(self::ERR_CAPTCHA);
return false;
}
if ($result['success'] == false) {
$this->error(self::BAD_CAPTCHA);
return false;
}
// Cache google respnonse to avoid second resubmission on ajax form
$_SESSION['recaptcha_cache'][] = $value[$this->_RESPONSE];
return true;
}
/**
* Render captcha
*
* @return string
*/
public function render()
{
TikiLib::lib('header')->add_css('.g-recaptcha-response {display:none !important;}');
return '';
}
/**
* Render captcha though Ajax
*
* @return string
*/
public function renderAjax()
{
static $id = 1;
TikiLib::lib('header')->add_js("
grecaptcha.render('g-recaptcha{$id}', {
'sitekey': '{$this->getPubkey()}'
});
", 100);
return '';
}
}