NukeViet\Core\Request::get_value PHP Method

    private function get_value($name, $mode = null, $default = null, $decode = true)
    {
        $modes = $this->parse_mode($mode);
        foreach ($modes as $mode) {
            switch ($mode) {
                case 'get':
                    if (array_key_exists($name, $_GET)) {
                        $value = $_GET[$name];
                        return $value;
                    }
                    break;
                case 'post':
                    if (array_key_exists($name, $_POST)) {
                        $value = $_POST[$name];
                        if (empty($value) or is_numeric($value)) {
                            return $value;
                        }
                        return $this->security_post($value);
                    }
                    break;
                case 'cookie':
                    if (array_key_exists($this->cookie_prefix . '_' . $name, $_COOKIE)) {
                        $value = $_COOKIE[$this->cookie_prefix . '_' . $name];
                        if ($decode) {
                            $value = $this->decodeCookie($value);
                        }
                        if (empty($value)) {
                            return $value;
                        }
                        return $this->security_cookie($value);
                    }
                    break;
                case 'session':
                    if (array_key_exists($this->session_prefix . '_' . $name, $_SESSION)) {
                        if (!$this->is_session_start) {
                            $this->sessionStart();
                        }
                        $value = $_SESSION[$this->session_prefix . '_' . $name];
                        if ($decode) {
                            $value = $this->decodeCookie($value);
                        }
                        if (empty($value)) {
                            return $value;
                        }
                        return $this->security_session($value);
                    }
                    break;
                case 'request':
                    if (array_key_exists($name, $_POST)) {
                        $value = $_POST[$name];
                        if (empty($value) or is_numeric($value)) {
                            return $value;
                        }
                        return $this->security_post($value);
                    } elseif (array_key_exists($name, $_GET)) {
                        $value = $_GET[$name];
                        return $value;
                    }
                    break;
                case 'env':
                    if (array_key_exists($name, $_ENV)) {
                        $value = $_ENV[$name];
                        return $value;
                    }
                    break;
                case 'server':
                    if (array_key_exists($name, $_SERVER)) {
                        $value = $_SERVER[$name];
                        return $value;
                    }
                    break;
            }
        }
        return $default;
    }