$imagepath = $imagename;
            $pic1 =  $imagepath; 
          $save = "http://www.giorgiotave.it/forum/images/" . $imagepath; //This is the new file you saving
          $file = "http://www.giorgiotave.it/forum/images/" . $imagepath; //This is the original file

          list($width, $height) = getimagesize($file) ; 
                                                     
          $modwidth = 150; 
                                                     
          $diff = $width / $modwidth;
                                                    
          $modheight = $height / $diff; 
          $tn = imagecreatetruecolor($modwidth, $modheight) ; 
          $image = imagecreatefromjpeg($file) ; 
          imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ; 
                                                    
          imagejpeg($tn, $save, 100) ; 

          $save = "http://www.giorgiotave.it/forum/images/sml_" . $imagepath; //This is the new file you saving
          $file = "http://www.giorgiotave.it/forum/images/" . $imagepath; //This is the original file
          list($width, $height) = getimagesize($file) ; 
                                              
      }        

[/php]Se ho selezionato un immagine lo script non da problemi.
Se invece non seleziono nessun file mi genera sta sfilza di errori

Warning: Division by zero in

Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in

Warning: imagecreatefromjpeg() [function.imagecreatefromjpeg]: gd-jpeg: JPEG library reports unrecoverable error: in

Warning: imagecreatefromjpeg() [function.imagecreatefromjpeg]: 'images/' is not a valid JPEG file in

Warning: imagecopyresampled(): supplied argument is not a valid Image resource in

Warning: imagejpeg(): supplied argument is not a valid Image resource in

Teoricamente la clausola if (isset ($_FILES['new_image'])){ non dovrebbe bloccare l'esecuzione di tutte le istruzioni sottostanti? Perchè vengono eseguite comunque?

Aiutatemi! E grazie in anticipo