请教php上传文件出错求解

include "../connss.php";
include "../checkA.php";
?>



  


 




$uptypes=array(  
    'image/jpg',  
    'image/jpeg',  
    'image/png',  
    'image/pjpeg',  
    'image/gif',  
    'image/bmp',  
    'image/x-png',
);  
$max_file_size=2000000;
$destination_folder="../../img/slider/";

$filesname=$_POST[title];
$id=$_POST[id];
$link=$_POST[linke];
if ($_SERVER['REQUEST_METHOD'] == 'POST')  
{  
    if (!is_uploaded_file($_FILES["upfile"][tmp_name]))  
    //是否存在文件  
    {  
         echo "图片不存在!";  
         exit;  
    }  
    
    $file = $_FILES["upfile"];  
    if($max_file_size < $file["size"])  
    //检查文件大小  
    {  
        echo "文件太大!";  
        exit;  
    }  
  
    if(!in_array($file["type"], $uptypes))  
    //检查文件类型  
    {  
        echo "文件类型不符!".$file["type"];  
        exit;  
    }  
  
    if(!file_exists($destination_folder))  
    {  
        mkdir($destination_folder);  
    }  
  
    $filename=$file["tmp_name"];  
    $image_size = getimagesize($filename);  
    $pinfo=pathinfo($file["name"]);  
    $ftype=$pinfo['extension'];  
    $destination = $destination_folder.time().".".$ftype;