如何在蛋糕php中添加驗證以僅允許字符？

Question

我是cakephp的新手。我創建了一個表單來添加用戶。我只想讓用戶名字符。我的驗證代碼如下：

public $validate = array(
     "username" => array(
      "required" => array(
       "rule" => array("notEmpty"), 
       "message" => "Name is required" 
      ) 
     ), 
     "age" => array(
      "required" => array(
       "rule" => array("notEmpty"), 
       "message" => "Age is required" 
      ) 
     ) 
); 

我應該添加什麼，只允許用戶名字符。

Answer 1

使用the "custom" rule，這需要一個正則表達式：

"rule" => array('custom', '[a-zA-Z]'), 

見Regex to match only letters

CakePHP Validation manual page.