这是我的代码
$firstname = new Zend_Form_Element_Text('firstname', array('id' => 'firstname'));
$firstname->setLabel('Firstname')
->addError('Your firstname.')
->addFilter('StringTrim')
->addFilter('StripTags')
->addValidator('StringLength', false, array(1))
->setRequired(true);
$form->addElement($firstname);
加载页面后,addValidator 会立即触发,并显示错误消息。