Codeigniter中的動態最大長度值

Question

我可以設置動態max_length驗證嗎？例如max_length['.$this->store->select($id)->stock.'] < - 它不工作

Answer 1

只要確保，$this->store->select($id)->stock返回有效數字：

$this->form_validation 
     ->set_rules(
        'your_field', 
        'Label', 
        'max_length['.$this->store->select($id)->stock.']' 

        // You can also trim it before checking length like below 
        //'trim|max_length['.$this->store->select($id)->stock.']' 
     );