图像无法在PHP上传

Question

好吧，我试图上传一个类别为tittle和description的图片，但是没有用，请帮帮我。我的代码是。

if(isset($_POST['save']))
{

    //for getting the file type
    echo $_FILES['file']['type'];   
    //verifying the images 
    if($_FILES['file']['type']=='image/jpeg' || $_FILES['file']['type']=='image/png'|| $_FILES['file']['type']=='image/gif' && $_FILES['file']['size']>0)
    {
    //protecting from injection somewhat
        $category=mysql_real_escape_string($_POST['category']);
        $category=stripslashes($category);
        $tittle=mysql_real_escape_string($_POST['tittle']);
        $tittle=stripslashes($tittle);
        $description=mysql_real_escape_string($_POST['description']);
        $description=stripslashes($description);

    //storing file in filename variable
    $fileName = $_FILES["file"]["name"];
    //destination dir
    $to="file/".$fileName;

if(move_uploaded_file($_FILES['file']['tmp_name'],$to))
{  
    if($query=mysql_query("INSERT INTO `soft_upload_category`(`id`, `soft_tittle`, `soft_url`, `soft_category`, `soft_description`) VALUES(NULL,'".$tittle."','".$to."','".$category."','".$description."');"))
        {
            echo '<script type="text/javascript">alert("Successfully Uploaded")</script>' ;
        }
            else{  echo '<script type="text/javascript">alert("Sorry Couldnt Move the File")</script>' ;   }
}
    else{'couldnt upload the file';}
    }
    else { echo '<script type="text/javascript">alert("Please Choose only the Image files")</script>' ; }
}

?>

当我按下保存按钮时，它会给我一个错误：

else{  echo '<script type="text/javascript">alert("Sorry Couldnt Move the File")</script>' ;   }