走投无路啦，关于表单的两步提交传递数组的有关问题

<?php<br /> session_start();<br /> require_once('pic_fns.php');<br /> include("upload.class.php");<br /><br /><br /> $edit_me = $_POST['edit_me'];                    //checkbox选中的数据储存在 edit_me数组中<br /> $valid_user = $_SESSION['valid_user'];          //检测是否登录<br /><br /> do_html_header("上传图片广告 Upload pic for machine");  <br />   try{<br /> 	   check_valid_user();                            //检测是否登录<br />   }catch(Exception $e){<br />       echo $e->getMessage();<br /> 	   do_html_url('login_admin.php','返回');<br /> 	   do_html_footer();<br /> 	   exit;<br />   }<br />   <br /> foreach ($edit_me as $k){                        //循环上传图片，提交后显示WARNING foreach的数据为空<br /><br />      if($_POST['submit']){                      //图片上传部分<br />          $image = new upload_image();<br />          $image->get_file_dir("pic/".$k."/");   //文件存放目录<br />          $image->get_upload_name($_FILES['file']['name']);<br />          $image->get_upload_size($_FILES['file']['size']);<br />          $image->get_upload_type($_FILES['file']['type']);<br />          $image->get_upload_tamp($_FILES['file']['tmp_name']);<br /><br />          $image->upload();<br />           display_user_menu();<br />           do_html_footer;<br />      }<br />   }<br /><br />  ?><br />  <form action="" method="post" enctype="multipart/form-data"><br />    <table align="center"><br />       图片来源：<input type="file" name="file"><br />           <input type="hidden" name="hidden" value="a"><br />                <input type="submit" name="submit" value="上传"><br />    </table><br />  </form><br /><br /><br />  <?php<br /><br /> display_user_menu();                <br /> do_html_footer;<br /><br />?>