php for simple file upload

         /*************start file upload************************/
         $target = "upload/";
         $target = $target . basename( $_FILES['uploaded']['name']) ;
         $ok=1;
         if(move_uploaded_file($_FILES['uploaded']['tmp_name'], $target))
         {
         echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded";
         }
         else {
         echo "Sorry, there was a problem uploading your file.";
         }
          /*************end file upload************************/
         $file_name=$_FILES["uploaded"]["name"] ;
         $file_type= $_FILES["file"]["type"];
         $file_size =$_FILES["file"]["size"] / 1024);// in KB