php-如何在codeigniter中对多个文本字段使用相同的回调函数

我想检查值是否不是整数和浮点数,我已书面形式验证如下,

$this->form_validation->set_rules('charge_hour', 'Per hour', 'xss_clean|callback_money_type');
$this->form_validation->set_rules('charge_day', 'Per day', 'xss_clean|callback_money_type');
$this->form_validation->set_rules('charge_weekly', 'Per week', 'xss_clean|callback_money_type');
$this->form_validation->set_rules('charge_monthly', 'Per month', 'xss_clean|callback_money_type');

所有提交的文本的通用回调函数是money_type()

    public function money_type($charge)
        {
            if (is_float($charge) == false && is_int($charge) == false && $charge >= 0)
            {
                $this->form_validation->set_message('{WHAT TO ENTER HERE}', 'Enter valid charges for space.');
                return FALSE;
            }
        else
        {
            return TRUE;
        }
    }

我如何在验证过程中找出{在这里输入什么}？字段名称在运行时是charge_hour,charge_day,charge_weekly,charge_monthly之一？这样表单验证将为每个字段显示不同的错误消息.

谢谢.

解决方法:

$this->form_validation->set_message('money_type','%s my message');

https://www.codeigniter.com/user_guide/libraries/form_validation.html#callbacks-your-own-validation-methods