Codeigniter中的动态最大长度值

Question

我可以动态设置max_length验证吗？例如max_length['.$this->store->select($id)->stock.']＆lt; - 它无效

Answer 1

请确保$this->store->select($id)->stock返回有效数字：

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

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