"；致命错误:类'；mod_virtuemart_product'；找不到

我试图安装我的模块，以便在mod_virtuemat_product模块内进行实时搜索。我以这种方式更改了mod_virtuemat_product.xml：

旧代码

<install type="module" version="1.5.0">
    <name>mod_virtuemart_product</name>
    <creationDate>March 17 2013</creationDate>
    <author>The VirtueMart Development Team</author>
    <authorUrl>http://www.virtuemart.net</authorUrl>
    <copyright>Copyright (C) 2004-2012 Virtuemart Team. All rights reserved.</copyright>
    <license>http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL</license>
    <version>2.0.20b</version>
    <description>MOD_VIRTUEMART_PRODUCT_DESC</description>
    <files>
    <filename module="mod_virtuemart_product">mod_virtuemart_product.php</filename>
    <filename>index.html</filename>
    <filename>helper.php</filename>
    <filename>tmpl/default.php</filename>
    <filename>tmpl/default2.php</filename>
    <filename>tmpl/default3.php</filename>
    <filename>tmpl/index.html</filename>
    </files>
    <params addpath="/administrator/components/com_virtuemart/elements">
    <param  name="layout" type="filelist" label="MOD_VIRTUEMART_PRODUCT_LAYOUT"
                description="MOD_VIRTUEMART_PRODUCT_LAYOUT_DESC"
                directory="/modules/mod_virtuemart_product/tmpl"
                default="default" hide_default="1" hide_none="1"
                stripext="1" filter="'.php$" exclude="^_" />
.
.
.

新代码

<extension type="module" version="2.5" method="upgrade">
    <name>mod_virtuemart_product</name>
    <creationDate>March 17 2013</creationDate>
    <author>The VirtueMart Development Team</author>
    <authorUrl>http://www.virtuemart.net</authorUrl>
    <copyright>Copyright (C) 2004-2012 Virtuemart Team. All rights reserved.</copyright>
    <license>http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL</license>
    <version>2.0.20b</version>
    <description>MOD_VIRTUEMART_PRODUCT_DESC</description>
    <files>
    <filename module="mod_virtuemart_product">mod_virtuemart_product.php</filename>
    <filename>index.html</filename>
    <filename>helper.php</filename>
    <filename>tmpl/default.php</filename>
    <filename>tmpl/index.html</filename>
    <filename>tmpl/quicksearch.php</filename>
    </files>
    <params addpath="/administrator/components/com_virtuemart/elements">
.
.
.

我在mod_virtuemart_product/tmpl文件夹中以这种方式创建了新的php文件和javascript文件：

我在mod_virtuemart_product/tmpl文件夹中以这种方式创建了新的php文件和javascript文件：

mod_virtuemart_product/tmpl/quicksearch.php
mod_virtuemart_product/tmpl/default.php - used by virtuemart (I just add to this code 
my search input code)
mod_virtuemart_product/tmpl/head.php
mod_virtuemart_product/tmpl/config.php
mod_virtuemart_product/tmpl/js/javascript.js
mod_virtuemart_product/tmpl/css/css.css

一切都是相连的。我的代码是功能性的，但当我想将此代码添加到我的quicksearch.php文件时：echo mod_virtuemat_product:：addtocart（$product）；

它给我写了一个错误：

"致命错误：在第34行的/www/t/r/u46223/public_html/modules/mod_virtuemart_product/tmpl/quicksearch.php中找不到类'mod_virtuemart_product'"

你能告诉我怎么了吗？

谢谢。

这是mod_virtuemart_product.php文件。我想把这个函数"mod_virtuemart_product:：addtocart（$product）"添加到我的文件quicksearch.php中，该文件位于modules/mod_virtutMart_production/tmpl文件夹中。谢谢

<?php
defined('_JEXEC') or die( 'Direct Access to '.basename(__FILE__).' is not allowed.' );
/*
* featured/Latest/Topten/Random Products Module
*
* @version $Id: mod_virtuemart_product.php 2789 2011-02-28 12:41:01Z oscar $
* @package VirtueMart
* @subpackage modules
*
*   @copyright (C) 2010 - Patrick Kohl
*
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
* VirtueMart is Free Software.
* VirtueMart comes with absolute no warranty.
*
* www.virtuemart.net
*/

if (!class_exists( 'VmConfig' )) require(JPATH_ADMINISTRATOR . DS . 'components' . DS . 'com_virtuemart'.DS.'helpers'.DS.'config.php');
VmConfig::loadConfig();
VmConfig::loadJLang('mod_virtuemart_product', true);
// Setting
$max_items =        $params->get( 'max_items', 2 ); //maximum number of items to display
$layout = $params->get('layout','default');
$category_id =      $params->get( 'virtuemart_category_id', null ); // Display products from this category only
$filter_category =  (bool)$params->get( 'filter_category', 0 ); // Filter the category
$display_style =    $params->get( 'display_style', "div" ); // Display Style
$products_per_row = $params->get( 'products_per_row', 4 ); // Display X products per Row
$show_price =       (bool)$params->get( 'show_price', 1 ); // Display the Product Price?
$show_addtocart =   (bool)$params->get( 'show_addtocart', 1 ); // Display the "Add-to-Cart" Link?
$headerText =       $params->get( 'headerText', '' ); // Display a Header Text
$footerText =       $params->get( 'footerText', ''); // Display a footerText
$Product_group =    $params->get( 'product_group', 'featured'); // Display a footerText
$mainframe = Jfactory::getApplication();
$virtuemart_currency_id = $mainframe->getUserStateFromRequest( "virtuemart_currency_id", 'virtuemart_currency_id',JRequest::getInt('virtuemart_currency_id',0) );

$key = 'products'.$category_id.'.'.$max_items.'.'.$filter_category.'.'.$display_style.'.'.$products_per_row.'.'.$show_price.'.'.$show_addtocart.'.'.$Product_group.'.'.$virtuemart_currency_id;
$cache  = JFactory::getCache('mod_virtuemart_product', 'output');
if (!($output = $cache->get($key))) {
    ob_start();
    // Try to load the data from cache.

    /* Load  VM fonction */
    if (!class_exists( 'mod_virtuemart_product' )) require('helper.php');
    $vendorId = JRequest::getInt('vendorid', 1);
    if ($filter_category ) $filter_category = TRUE;
    $productModel = VmModel::getModel('Product');
    $products = $productModel->getProductListing($Product_group, $max_items, $show_price, true, false,$filter_category, $category_id);
    $productModel->addImages($products);
    $totalProd =        count( $products);
    if(empty($products)) return false;
    $currency = CurrencyDisplay::getInstance( );
    if ($show_addtocart) {
        vmJsApi::jPrice();
        vmJsApi::cssSite();
    }
    /* Load tmpl default */
require(JModuleHelper::getLayoutPath('mod_virtuemart_product',$layout));
    $output = ob_get_clean();
    $cache->store($output, $key);
}
echo $output;
?>