Fublin,
include 'koeimg.php';
$all = glob('./files/users/photo/*.jpg');
#echo '<pre>';
#print_r($all); exit;
foreach ($all as $k => $pic) {
$fn = basename($pic);
$fn = strstr($fn, '.', 1);
$img = new Koeimg($pic);
$img->resize(100, 100)->out('jpg', './av/minifoto/' . $fn . '_resize');
}