gistfile1.txt

<?php

class Module_Form_NewSomething extends Zend_Form
{
    public function init()
    {
        $this->addElements(array(
            $name  = new Zend_Form_Element_Text('name'),
            $email = new Zend_Form_Element_Text('email'),
        ));

        $name->setLabel('Name')
             ->addValidator('Alnum', false, array('messages' => array(
                      // set message here
               ))
             ->setRequired(true);
    }
}