/**
* Submits an HTTP POST to a reCAPTCHA server
* @param string $host
* @param string $path
* @param array $data
* @param int port
* @return array response
*/
public static function _recaptcha_http_post($host, $path, $data, $port = 80)
{
$req = Recaptcha::_recaptcha_qsencode($data);
$http_request = "POST {$path} HTTP/1.0\r\n";
$http_request .= "Host: {$host}\r\n";
$http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
$http_request .= "Content-Length: " . strlen($req) . "\r\n";
$http_request .= "User-Agent: reCAPTCHA/PHP\r\n";
$http_request .= "\r\n";
$http_request .= $req;
$response = '';
if (false == ($fs = @fsockopen($host, $port, $errno, $errstr, 10))) {
die('Could not open socket');
}
fwrite($fs, $http_request);
while (!feof($fs)) {
$response .= fgets($fs, 1160);
}
// One TCP-IP packet
fclose($fs);
$response = explode("\r\n\r\n", $response, 2);
return $response;
}