Scalr\UI\Request\JsonData::initFromRequest PHP Метод

    public static function initFromRequest($value, $name = '')
    {
        if (is_array($value)) {
            throw new BadRequestException(sprintf('JsonData expects parameter "%s" to be string, array given', $name));
        }
        $decoded = json_decode($value, true);
        if (is_null($decoded) && !empty($value) && !(strlen($value) == 4 && strtolower($value) === 'null')) {
            throw new BadRequestException(sprintf('JsonData expects parameter "%s" to be json-encoded string, but it could not be decoded: %s', $name, json_last_error_msg()));
        }
        if (!empty($decoded) && !is_array($decoded)) {
            // decoded could be int, string or bool
            throw new BadRequestException(sprintf('Passed parameter "%s" is not an array or object', $name));
        }
        return new self($decoded ? $decoded : []);
    }