文件输入在joomla 2.5组件中不起作用

Question

I have a simple component that must upload a file to the server, but when submit form I see this error:

Notice: Undefined index: uploaded_file in D:\wamp\www\joomla2.5\components\com_print\print.php on line 13

component is in frontend and my code is:

<?php
// no direct access
defined('_JEXEC') or die;
jimport('joomla.application.component.controller'); 
?>
<form enctype="multipart/form-data" action="<?php $_SERVER['PHP_SELF']; ?>" method="post">
    <input type="hidden" name="MAX_FILE_SIZE" value="1000000" />
    Choose a file to upload: <input name="uploaded_file" type="file" />
    <input type="submit" value="Upload" />
</form>
<?php
echo $_POST['uploaded_file'];
echo $_POST['MAX_FILE_SIZE'];
?>

please help.

Answer 1

The datas for an input of type "file" are in $_FILES not $_POST

var_dump($_FILES['uploaded_file']);