Zend Form Validator Callback: How to exclude a username?
问题 I have written one function in User Mapper class userExist($username) which return true if same username does not exist in my database table. Now I want to use this function in the Add_User_Form class which extends Zend_Form. I want to use: $username = $this->createElement('text','username'); $username->setLabel('Username:') ->addValidator('Callback', true, array('callback'=>userExist???)); Can I use mapper class userExist($username) function as callback function? Please let me know if I am