Codeigniter表單驗證規則一個字段應該大於其他

Question

我需要確保amount字段大於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

試試這個代碼：

創建一個函數：

希望它會工作：

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' 
    )