在Zend_Form中创建自定义表单元素

我正在尝试创建一个自定义表单字段Zend_Form来存储SWFUpload所需的HTML片段(用于flash文件上传器的目的).

我已经尝试过几个不同的教程,但我感到非常困惑,到目前为止,这就是我所拥有的:

/application/forms/elements/SwfUpload.php
                            SwfUploadHelper.php

这些文件在Bootstrap中自动加载(好吧,SwfUpload.php肯定是).

SwfUpload.php:

class Custom_Form_Element_SwfUpload extends Zend_Form_Element
{
    public $helper = 'swfUpload';
}

SwfUploadHelper.php:

class Custom_Form_Helper_SwfUpload extends Zend_View_Helper_FormElement
{
    public function swfUpload()
    {
        $html = '

                    
Upload upto 5 image files(jpg, png, gif), each having maximum size of 1MB(Use Ctrl/Shift to select multiple files)
                    
                    

                    

                
';
        return $html;
    }
}

当我像这样实例化这个类:

class Form_ApplicationForm extends Zend_Form
{
    public function init()
    {
        $custom = new Custom_Form_Element_SwfUpload('swfupload');
        // etc etc

我收到此错误:

消息:在注册表中找不到名称为"SwfUpload"的插件; 使用的路径:Zend_View_Helper_:Zend/View/Helper /:/ home/mysite/application/views/helpers /

它是否预期我的助手会在" home/mysite/application/views/helpers/"？我尝试使用文件名"SwfUpload.php"在那里创建相同的帮助程序,但错误仍然存​​在.不确定我这纯粹是文件名/路径问题还是其他问题.

谢谢.

这就是我最终的结果,希望它可以帮助别人:

在 /application/forms/elements/SwfUpload.php

class Custom_Form_Element_SwfUpload extends Zend_Form_Element
{
    public $helper = 'swfUpload'; # maps to method name in SwfUpload helper
    public function init()
    {
        $view = $this->getView();
        $view->addHelperPath(APPLICATION_PATH.'/views/helpers/', 'Custom_Form_Helper');
    }
}

在 /application/views/helpers/SwfUpload.php

class Custom_Form_Helper_SwfUpload extends Zend_View_Helper_FormElement
{
    public function init(){} 

    public function swfUpload()
    {
        $html = '

                    
Upload upto 5 image files(jpg, png, gif), each having maximum size of 1MB(Use Ctrl/Shift to select multiple files)
                    
                    

                    

                
';
        return $html;
    }
}