Ciao, ho ancora un problema.

Questo è il mio codice:
Codice PHP:
if(strlen($testo_form_photo) > 0)
{
 $FilePointer = fopen($testo_form_photo, "r");
 if($FilePointer)
 {
  $FileHeaders = stream_get_meta_data($FilePointer);
  foreach($FileHeaders as $FileHeader)
  {
   foreach($FileHeader as $HeaderValue)
   {
    if(strpos(strtolower($HeaderValue), "image/jpg"))
    {echo "ok";}
   }
  }
 }
} 
Mi restituisce questo errore:

[24-Apr-2012 15:55:49 UTC] PHP Warning: strtolower() expects parameter 1 to be string, array given in index.php on line 1292
[24-Apr-2012 15:55:49 UTC] PHP Warning: strtolower() expects parameter 1 to be string, resource given in index.php on line 1292
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in /home/worldte1/public_html/user/index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290
[24-Apr-2012 15:55:49 UTC] PHP Warning: Invalid argument supplied for foreach() in index.php on line 1290

Ho notato che $FilePointer contiene "Resource id #30"

Che dite?