core/Form.php
public function getHideBox(string $name = null)
    {
        if (empty($name)) {
            return $this->hideBox;
        }
        if (isset($this->hideBox[$name])) {
            return $this->hideBox[$name];
        }
        return null;
    }
public function getHideBox(string $name = null)
    {
        if (empty($name)) {
            return $this->hideBox;
        }
        if (isset($this->hideBox[$name])) {
            return $this->hideBox[$name];
        }
        return null;
    }
获取一个隐藏输入框的值
@param string|null $name
@return array|mixed