<?php
/**
 * Form to proceed to printing partial application
 *
 * @author zburnham
 * @version 0.01
 */
class Efi_Form_Nmarp_ContinueToExtendedInfo extends Zend_Form
{
    /**
     * Registration code.
     *
     * @var string
     */
    protected $code;

    /**
     * Target of form (action)
     *
     * @var string
     */
    protected $actionTarget;

    /**
     * Value for submit button
     *
     * @var string
     */
    protected $submitValue;

    /**
     * Namespace to differentiate different instances of same form
     *
     * @var Zend_Session_Namespace
     */
    protected $csrfNamespace;

    /**
     * Initialize form.
     *
     */

    public function __construct($code = NULL, $action = NULL, $submitValue = NULL, Zend_Session_Namespace $csrfNamespace = NULL)
    {
        $this->setCode($code);
        $this->setAction($action);
        $this->setSubmitValue($submitValue);
        $this->setCsrfNamespace($csrfNamespace);
        parent::__construct();
    }

    public function init()
    {
        $this->setMethod('POST');

        /**
         * code element
         */
        $code = new Zend_Form_Element_Hidden('code');
        $code->addFilter(new Zend_Filter_StripTags())
             ->addValidator(new Zend_Validate_StringLength(8,8))
             ->addValidator(new Zend_Validate_Alnum())
             ->setValue($this->getCode())
             ->setLabel("Code:")
             ->clearDecorators()
             ->addDecorator('ViewHelper')
             ->setRequired();
        $this->addElement($code);

        /**
         * CSRF protection
         */
        $csrf = new Zend_Form_Element_Hash('csrf');
        $csrf->addFilter(new Zend_Filter_StripTags())
             ->addFilter(new Zend_Filter_Alnum())
             ->setRequired()
             ->setSession($this->getCsrfNamespace())
             ->clearDecorators()
             ->addDecorator('ViewHelper')
             ->setIgnore(TRUE);
        $this->addElement($csrf);

        /**
         * submit element
         */
        $submit = new Zend_Form_Element_Submit('submit');
        $submit->addFilter(new Zend_Filter_StripTags())
               ->addFilter(new Zend_Filter_Alnum())
               ->setRequired()
               ->setValue($this->getSubmitValue())
               ->setLabel($this->getSubmitValue())
               ->clearDecorators()
               ->addDecorator('ViewHelper')
               ->addDecorator('Errors')
               ->addDecorator('Description', array('tag' => 'p', 'class' => 'description'))
               ->addDecorator('HtmlTag', array('tag' => 'td',
                                               'id'  => $submit->getName() . '-element'));
        $this->addElement($submit);
    }

    /**
     * @return string
     */
    public function getCode()
    {
        return $this->code;
    }

    /**
     * @param string $registrationCode
     * @return Efi_Form_Nmarp_PrintPartialApplication
     */
    public function setCode($code)
    {
        $this->code = $code;
        return $this;
    }

    /**
     * @return string
     */
    public function getActionTarget()
    {
        return $this->actionTarget;
    }

    /**
     * @param string $actionTarget
     * return Efi_Form_Nmarp_ContinueToExtendedInfo
     */
    public function setActionTarget($actionTarget)
    {
        $this->actionTarget = $actionTarget;
        return $this;
    }

    /**
     * @return string
     */
    public function getSubmitValue()
    {
        return $this->submitValue;
    }

    /**
     * @param string $submitValue
     * @return Efi_Form_Nmarp_ContinueToExtendedInfo
     */
    public function setSubmitValue($submitValue)
    {
        $this->submitValue = $submitValue;
        return $this;
    }

    /**
     * @return Zend_Session_Namespace
     */
    public function getCsrfNamespace()
    {
        return $this->csrfNamespace;
    }

    /**
     * @param Zend_Session_Namespace $csrfNamespace
     * @return Efi_Form_Nmarp_ContinueToExtendedInfo
     */
    public function setCsrfNamespace($csrfNamespace)
    {
        $this->csrfNamespace = $csrfNamespace;
        return $this;
    }
}

Controller code:
            $printPartialApplicationForm = new Efi_Form_Nmarp_ContinueToExtendedInfo($newCode, '/' . $this->getOriginalControllerName() . '/printpartial', "Print Mail-In Application Now", new Zend_Session_Namespace('partial'));
            $this->view->printPartialApplicationForm = $printPartialApplicationForm;

            $proceedToCompleteForm = new Efi_Form_Nmarp_ContinueToExtendedInfo($newCode, '/' . $this->getOriginalControllerName() . '/step4', 'Proceed to Complete Application Now', new Zend_Session_Namespace('full'));
            $this->view->proceedToCompleteForm = $proceedToCompleteForm;

...

           $continueToExtendedInfoValidationForm = new Efi_Form_Nmarp_ContinueToExtendedInfo(NULL, NULL, NULL, new Zend_Session_Namespace('partial'));
            if ($continueToExtendedInfoValidationForm->isValid($post)){  etc.