图像在本地上传，但在托管后不上传

Question

图片上传在本地成功。但在托管后，它无法正常工作。

    $imgname=$_FILES["imgfile"]["name"];
        if($imgname!=''){
            if ((($_FILES["imgfile"]["type"] == "image/jpeg")
            || ($_FILES["imgfile"]["type"] == "image/jpg"))
            && ($_FILES["imgfile"]["size"] < 200000))
            {
                list($img)=explode("@",$mail); $img=$img.".jpg";
                $extension=end(explode(".", $_FILES["imgfile"]["name"]));
                move_uploaded_file($_FILES["imgfile"]["tmp_name"],"dpstaff/".$img);
            } else { ?> <script type="text/javascript"> alert(" Type mismatch or Exceed Size "); window.location = "reg2.php";  </script> <?php }
        } else { ?> <script type="text/javascript"> alert(" No Image Selected "); window.location = "reg2.php"; </script> <?php  }

    header("location:staf2.php");
    }
    else
    {   ?>
    <script type="text/javascript">
        alert("Exist same value (mobile no.)");
    </script>
    <?php
    }

和html代码是：

<form method="post" action="staf1.php" enctype="multipart/form-data" >
<tr>
    <td> Photo </td>
    <td> <input type="file" name="imgfile" id="imgfile" <?php if(!(isset($_GET["edit"]))) echo "required"; ?> /> 
    <mandatory>( < 200KB , jpg format) </mandatory></td>
</tr>
</form>

还有一个问题，信息没有显示。