$files = $db->query("SELECT * FROM `table` WHERE `user` = '".$profile['id']."'")->fetch_assoc();
sizeconvert(array_sum($files))
function sizeconvert($size) {
$iec = array('б', 'Кб', 'Мб', 'Гб', 'Тб', 'Пб', 'Эб');
$i = 0;
while (($size/1024)>1) {
$size = $size/1024;
$i++;
}
$echo = round($size,2).' '.$iec[$i];
return $echo;
}