PHP works in a folder but not in another

Ok, so I have made a form on a .html page and a .php page to upload an image and then save som data from the form along with the filepath for the image. The problem is when I move it from the root folder to root/backweb it wont work. I have created a new uploads folder in the backweb folder and also copied the conn.inc.php file over to the backweb folder for simplicity.

When I run it from the root foler it says "Releasen sparades!" (Release saved) but when I run it from the backweb server it says "Ogiltig filtyp!..." (Invalid filetype). Any ideas?

Here's the code:

<?
require_once 'conn.inc.php';

if (($_FILES["cover"]["type"] == "image/gif")
|| ($_FILES["cover"]["type"] == "image/png")
|| ($_FILES["cover"]["type"] == "image/jpeg")
|| ($_FILES["cover"]["type"] == "image/pjpeg"))
  {
  if ($_FILES["cover"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["cover"]["error"] . "<br />";
    }
  else
    {

    if (file_exists("uploads/" . $_FILES["cover"]["name"]))
      {
      echo $_FILES["cover"]["name"] . " finns redan på servern. ";
      }
    else
      {
      move_uploaded_file($_FILES["cover"]["tmp_name"],
      "uploads/" . $_FILES["cover"]["name"]);
      $cover = "uploads/" . $_FILES["cover"]["name"];
      }
    }
  }
else
  {
  echo "Ogiltig filtyp! Endast bilder &auml;r till&aring;tna (.jpg, .png och .gif)</br>
  <a href=\"uploadform.html\">F&ouml;rs&ouml;k igen</a>";
  }


$band = $_REQUEST["band"];
$title = $_REQUEST["title"];
$catnum = $_REQUEST["catnum"];
$format = $_REQUEST["format"];

$query = "INSERT INTO releases (band,title,catnum,format,cover) VALUES ('$band','$title','$catnum','$format','$cover')";

$result = mysql_query($query);
    if ($result == NULL)
    {
        echo "N&aring;got gick fel, releasen sparades ej!";
        ?>
        <br/&g开发者_运维百科t;
        <br/>
        <a href="editreleases.php">Försök igen!</a>
        <?
    }
    else
    {
        echo "Releasen sparades!";
    }
?>

You have to give correct paths to your directories, ie

if (file_exists("../uploads/" . $_FILES["cover"]["name"]))

vs

if (file_exists("uploads/" . $_FILES["cover"]["name"]))

sound like folder permissions are not set for PHP to access files in the non-root folder

Maybe you should use is_uploaded_file instead of file_exists? And use $_FILES["cover"]["tmp_name"] for the path to the file. Example from PHP manual:

if (is_uploaded_file($_FILES['userfile']['tmp_name']))
{
   echo "File ". $_FILES['userfile']['name'] ." uploaded successfully.\n";
   echo "Displaying contents\n";
   readfile($_FILES['userfile']['tmp_name']);
}
else
{
   echo "Possible file upload attack: ";
   echo "filename '". $_FILES['userfile']['tmp_name'] . "'.";
}

In addition, as @trailmax notes, check that PHP can actually access the folder files are uploaded to.