Upload of files gives Mimetype on header

Hi When I try to upload files using the example in the PHP documentation, i get uploaded files with the first two lines being e.g.: " Content-type : image/jpeg " How can I remove this mime type from the images that I upload (so I can perform some manipulation of the images) The code : echo "<FORM ENCTYPE=\"multipart/form-data\" ACTION=\"$PHP_SELF\" METHOD=\"POST\">"; //echo "<FORM ACTION=\"$PHP_SELF\" METHOD=\"POST\">"; echo "<INPUT TYPE=\"hidden\" name=\"MAX_FILE_SIZE\" value=\"10000000\">"; echo "Send this file: <INPUT NAME=\"userfile\" TYPE=\"file\">"; echo "<INPUT TYPE=\"submit\" name=\"upload\" VALUE=\"upload\">"; echo "</FORM>"; if ($upload) { echo "Userfile : $userfile<BR>"; if (is_uploaded_file($userfile)) { copy($userfile, "/tmp/WynnBase.tmp"); } else { echo "Possible file upload attack: filename '$userfile'."; } }