Php 文件名不能为空上载图像时出错

我在我的数据库中存储了2个图像。如果我一次上传两张图片，那么它的存储成功了。但是如果我只上传图片1，或者我上传图片2，或者我没有上传任何图片，那么我会收到这个警告

警告：文件\u get\u contents（）[function.file get contents]：第24行C:\wamp\www\print\main.php中的文件名不能为空

我的代码是：

    <label for="certificate">Upload Scaned Document:</label>
     <input type="file"  name="image" /> 
                 OR
     <label for="certificate">Upload Scaned QR Code</label>
     <input type="file" name="QRimage"  />

就连我也试过这么做：

    if(isset($_FILES["image"]) && (!empty($_FILES["image"])) && ($_FILES['image']['error'] == 0))

及

然后我就能克服这个警告

如果我尝试上传Image1

         Notice: Undefined variable: QRimageName in C:\wamp\www\print\main.php on line 59
         Notice: Undefined variable: QRimageData in C:\wamp\www\print\main.php on line 59

如果我尝试上传Image2的话

         Notice: Undefined variable: imageName in C:\wamp\www\print\main.php on line 59
         Notice: Undefined variable: imageData in C:\wamp\www\print\main.php on line 59

我受够了这个错误请帮我解决这个问题试试这个

$imageName = "";
$imageData = "";
$QRimageName = "";
$QRimageData = "";
if(!empty($_FILES["image"]["name"])){ 
    $imageName = mysql_real_escape_string($_FILES["image"]["name"]);
    $imageData = mysql_real_escape_string(file_get_contents($_FILES["image"]["tmp_name"]));
}
if(!empty($_FILES["QRimage"]["name"])){
    $QRimageName = mysql_real_escape_string($_FILES["QRimage"]["name"]);
    $QRimageData = mysql_real_escape_string(file_get_contents($_FILES["QRimage"]["tmp_name"]));
}

         Notice: Undefined variable: imageName in C:\wamp\www\print\main.php on line 59
         Notice: Undefined variable: imageData in C:\wamp\www\print\main.php on line 59

$imageName = "";
$imageData = "";
$QRimageName = "";
$QRimageData = "";
if(!empty($_FILES["image"]["name"])){ 
    $imageName = mysql_real_escape_string($_FILES["image"]["name"]);
    $imageData = mysql_real_escape_string(file_get_contents($_FILES["image"]["tmp_name"]));
}
if(!empty($_FILES["QRimage"]["name"])){
    $QRimageName = mysql_real_escape_string($_FILES["QRimage"]["name"]);
    $QRimageData = mysql_real_escape_string(file_get_contents($_FILES["QRimage"]["tmp_name"]));
}