Problem s nahravanim obrazkov

<?php
$uploadedfile = $_FILES['uploadfile']['tmp_name'];
$id=$_GET['id'];
$src = imagecreatefromjpeg($uploadedfile);
list($width,$height)=getimagesize($uploadedfile);
$newwidth=120;
$newheight=50;
   if ($width>$newwidth || $height>$newheight)
   {
    if ($width>120)
    {
    $newwidth=120;
    $newheight=($height/$width)*120;
     $tmp=imagecreatetruecolor($newwidth,$newheight);
    }
    if ($height>50)
    {
    $newheight=50;
    $newwidth=($width/$height)*50;
     $tmp=imagecreatetruecolor($newwidth,$newheight);
    }
   }
imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);
$ext = explode('.',$_FILES['uploadfile']['name']);
$ext = $ext[count($ext)-1];
$filename = "imgs/".$id.".".$ext;
imagejpeg($tmp,$filename,100);
imagedestroy($src);
imagedestroy($tmp);
?>