将文件上传器添加到 Joomla 管理组件

我根据 Joomla 指南制作了 Joomla 管理组件 -http://docs.joomla.org/Developing_a_Model-View-Controller_Component/2.5/Developing_a_Basic_Component http://docs.joomla.org/Developing_a_Model-View-Controller_Component/2.5/Developing_a_Basic_Component

因为我需要有文件上传器，让用户上传单个文件。

在administrator\components\com_invoicemanager\models\forms\invoicemanager.xml中我定义了

<field name="invoice" type="file"/>

在控制器administrator\components\com_invoicemanager\controllers\invoicemanager.php中，我尝试检索该文件，如下所示。但它不起作用（无法检索文件）

我哪里做错了？

我如何获取文件并将其保存在磁盘上？

class InvoiceManagerControllerInvoiceManager extends JControllerForm
{
    function save(){
        $file = JRequest::getVar( 'invoice', '', 'files', 'array' );
        var_dump($file);
        exit(0);
    }
}

确保您已包含enctype="multipart/form-data"以文件正在提交的形式。这是一个常见的错误

/// Get the file data array from the request.
$file = JRequest::getVar( 'Filedata', '', 'files', 'array' ); 

/// Make the file name safe.
jimport('joomla.filesystem.file');
$file['name'] = JFile::makeSafe($file['name']);

/// Move the uploaded file into a permanent location.
if (isset( $file['name'] )) {

/// Make sure that the full file path is safe.
$filepath = JPath::clean( $somepath.'/'.strtolower( $file['name'] ) );

/// Move the uploaded file.
JFile::upload( $file['tmp_name'], $filepath );}