function changeImage(&$im, $data)
{
$image = new Image();
foreach ($data as $action => $val) {
switch ($action) {
case 'rotate':
$image->rotate($im, $val);
break;
case 'size':
$image->resize($im, $val);
break;
case 'filter':
$image->filter($im, $val);
break;
}
}
}