$state = getOptionalParameter($_POST, 'state', null);
$code = getOptionalParameter($_POST, 'code', null);
$state = getOptionalParameter($_POST, 'state', null);
$code = getOptionalParameter($_POST, 'code', null);
//code only given for "code" response_type, not for "id" mode
parse_str(base64_decode($code), $codeParts);
$emoji = verifyParameter($codeParts, 'emoji');
//code only given for "code" response_type, not for "id" mode
parse_str(base64_decode($code), $codeParts);
$emoji = verifyParameter($codeParts, 'emoji');