Codice PHP:
function resizeImage($filename)
{
    
$width 50;
    
$height 50;

    
header('Content-type: image/jpeg');

    list(
$width_orig$height_orig) = getimagesize($filename);

$width=100;
$height=80;

    
$image_p imagecreatetruecolor($width$height);
    
$image imagecreatefromjpeg($filename);
    
imagecopyresampled($image_p$image0000$width$height$width_orig$height_orig);


    
imagejpeg($image_pnull100);
}




resizeImage($img); 
mi stampa da solo

codice:
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e non mi crea la thumbnail..come mai?