file rename while uploading

Question

I have a problem here im trying to upload a file

first time it is moving the filename from temp it its respective directory,

but again i try ot upload the a

Answer 1

What about...

$place_file = "$path/$upload_to/$file_name";     

if (file_exists($place_file)) {
   $place_file = date("mdYHis")."_".$file_name;
}

if (!move_uploaded_file($tmp, $place_file)) {
   echo "Could not move file";
   exit;
}