Codeigniter表单验证规则一个字段应该大于其他

Question

我需要确保amount字段大于amount_left字段。

$config=array(
    array(
        'field'   => 'amount',
        'label'   => 'actual amount',
        'rules'   => 'trim|required'
    ),
    array(
        'field'   => 'amount_left',
        'label'   => 'amount left',
        'rules'   => 'trim|required'
    )
)

Answer 1

试用此代码：

创建一个函数：

希望它能奏效：

function check_bigger($amount,$amount_left)
 {
    if ($amount >= $amount_left)
    {
        $this->form_validation->set_message('check_bigger', 'The First &/or Second fields have errors.');
        return false;       
    }
    else
   {
        return true;
   }
   }

$v$this->input->post('amount_left');
$config=array(
    array(
        'field'   => 'amount',
        'label'   => 'actual amount',
        'rules'   => 'trim|required|callback_check_bigger['.$v.']',

    ),
    array(
        'field'   => 'amount_left',
        'label'   => 'amount left',
        'rules'   => 'trim|required'
    )